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- 目录
篇1：托福真题练习TOEFL
托福阅读文本：
Rent control is the system whereby the local government tells building owners how much they can charge their tenants in rent. In the United States, rent controls date back to at least World War II.
In 1943 the federal government imposed rent controls to help solve the problem of housing shortages during wartime. The federal program ended after the war, but in some locations, including New York City, controls continued. Under New York's controls, a landlord generally cannot raise rents on apartments as long as the tenants continue to renew their leases. In places such as Santa Monica, California, rent controls are more recent. They were spurred by the inflation of the 1970's, which, combined with California's rapid population growth, pushed housing prices, as well as rents, to record levels. In 1979 Santa Monica's municipal government ordered landlords to roll back their rents to the levels charged in 1978. Future rents could only go up by two-thirds as much as any increase in the overall price level.
In any housing market, rental prices perform three functions: (1) promoting the efficient maintenance of existing housing and stimulating the construction of new housing, (2) allocating existing scarce housing among competing claimants, and (3) rationing use of existing housing by potential renters.
One result of rent control is a decrease in the construction of new rental units. Rent controls have artificially depressed the most important long-term determinant of profitability — rents. Consider some examples. In a recent year in Dallas, Texas, with a 16 percent rental vacancy rate but no rent control laws, 11,000 new housing units were built. In the same year, in San Francisco, California, only 2,000 units were built. The major difference? San Francisco has only a 1.6 percent vacancy rate but stringent rent control laws. In New York City, except for government-subsidized construction, the only rental units being built are luxury units, which are exempt from controls. In Santa Monica, California, new apartments are not being constructed. New office rental space and commercial developments are, however. They are exempt from rent controls.
托福阅读题目：
1. What does the passage mainly discuss?
(A) The construction of apartments in the United States.
(B) Causes and effects of rent control
(C) The fluctuations of rental prices
(D) The shortage of affordable housing in the United States.
2. The word “They” in line 9 refers to
(A) the tenants
(B) their leases
(C) places
(D) rent controls.
3. Which of the following was NOT a reason for the introduction of rent controls in Santa Monica,
California?
(A) rapid population growth
(B) inflation
(C) economic conditions during wartime
(D) record-high housing prices
4. The phrase “roll back” in line 11 is closest in meaning to
(A) credit
(B) measure
(C) vary
(D) reduce
5. The word “stimulating” in line 15 is closest in meaning to
(A) experimenting with
(B) identifying
(C) estimating
(D) encouraging
6. It can be inferred that the purpose of rent control is to
(A) protect tenants
(B) promote construction
(C) increase vacancy rates
(D) decrease sales of rental units
7. The word “depressed” in line 19 is closest in meaning to
(A) saddened
(B) created
(C) lowered
(D) defeated
8. The information in the last paragraph supports which of the following statements?
(A) San Francisco has eliminated its rent control laws.
(B) Rent control leads to a reduction in the construction of housing units
(C) Luxury apartments are rarely built when there is rent control
(D) There is a growing need for government-subsidized housing.
9.According to the passage , which of the following cities does NOT currently have rent controls?
(A) Santa Monica
(B) Dallas
(C) San Francisco
(D) New York City
10. The word “stringent” in line 23 is closest in meaning to
(A) straightforward
(B) strict
(C) expanded
(D) efficient
11.According to the passage , which of the following is NOT exempt from rent control?
(A) Luxury apartments
(B) Commercial development
(C) Moderately priced apartments
(D) Office space.
托福阅读答案：
BDCDDACBBB C
篇2：托福真题练习TOEFL
托福阅读文本：
Butterflies are among the most extensively studied insects — it is estimated that 90 percent of the world's species have scientific names. As a consequence, they are perhaps the best group of insects for examining patterns of terrestrial biotic diversity and distribution. Butterflies also have a favorable image with the general public. Hence, they are an excellent group for communicating information on science and conservation issues such as diversity.
Perhaps the aspect of butterfly diversity that has received the most attention over the past century is the striking difference in species richness between tropical and temperate regions. For example, in 1875 one biologist pointed out the diversity of butterflies in the Amazon when he mentioned that about 700 species were found within an hour's walk, whereas the total number found on the British islands did not exceed 66, and the whole of Europe supported only 321. This early comparison of tropical and temperate butterfly richness has been well confirmed.
A general theory of diversity would have to predict not only this difference between temperate and tropical zones, but also patterns within each region, and how these patterns vary among different animal and plant groups. However, for butterflies, variation of species richness within temperate or tropical regions, rather man between them, is poorly understood. Indeed, comparisons of numbers of species among the Amazon basin, tropical Asia, and Africa are still mostly “personal communication” citations, even for vertebrates. In other words, unlike comparison between temperate and tropical areas, these patterns are still in the documentation phase.
In documenting geographical variation in butterfly diversity, some arbitrary, practical decisions are made. Diversity, number of species, and species richness are used synonymously;little is known about the evenness of butterfly distribution. The New World butterflies make up the preponderance of examples because they are the most familiar species. It is hoped that by focusing on them, the errors generated by imperfect and incomplete taxonomy will be minimized.
托福阅读题目：
1. Which aspect of butterflies does the passage mainly discuss?
(A) Their physical characteristics
(B) Their names
(C) Their adaptation to different habitats
(D) Their variety
2. The word “consequence” in line 2 is closest in meaning to
(A) result
(B) explanation
(C) analysis
(D) requirement
3. Butterflies are a good example for communicating information about conservation issues
because they
(A) are simple in structure
(B) are viewed positively by people
(C) have been given scientific names
(D) are found mainly in temperate climates
4. The word “striking” in line 8 is closest in meaning to
(A) physical
(B) confusing
(C) noticeable
(D) successful
5. The word “exceed” in line 11 is closest in meaning to
(A) locate
(B) allow
(C) go beyond
(D) come close to
6. All of the following are mentioned as being important parts of a general theory of diversity EXCEPT
(A) differences between temperate and tropical zones
(B) patterns of distribution of species in each region
(C) migration among temperate and tropical zones
(D) variation of patterns of distribution of species among different animals and plants
7. The author mentions tropicalAsia in lines 19 as an example of a location where
(A) butterfly behavior varies with climate
(B) a general theory of butterfly diversity has not yet been firmly established
(C) butterflies are affected by human populations
(D) documenting plant species is more difficult than documenting butterfly species
8. Which of the following is NOT well understood by biologists?
(A) European butterfly habitats
(B) Differences in species richness between temperate and tropical regions
(C) Differences in species richness within a temperate or a tropical region
(D) Comparisons of behavior patterns of butterflies and certain animal groups
9. The word “generated” in line 26 is closest in meaning to
(A) requested
(B) caused
(C) assisted
(D) estimated
托福阅读答案：
DABCC CBCB
篇3：托福真题练习TOEFL
托福阅读文本：
During the second half of the nineteenth century, the production of food and feed crops in the United States rose at an extraordinarily rapid rate. Corn production increased by four and a half times, hay by five times, oats and wheat by seven times. The most crucial factor behind this phenomenal upsurge in productivity was the widespread adoption of labor-saving machinery by northern farmers. By 1850 horse-drawn reaping machines that cut grain were being introduced into the major grain-growing regions of the country. Horse-powered threshing machines to separate the seeds from the plants were already in general use. However, it was the onset of the Civil War in 1861 that provided the great stimulus for the mechanization of northern agriculture.
With much of the labor force inducted into the army and with grain prices on the rise, northern farmers rushed to avail themselves of the new labor-saving equipment. In 1860 there were approximately 80,000 reapers in the country; five years later there were 350,000.
After the close of the war in 1865, machinery became ever more important in northern agriculture, and improved equipment was continually introduced. By 1880 a self-binding reaper had been perfected that not only cut the grain, but also gathered the stalks and bound them with twine. Threshing machines were also being improved and enlarged, and after 1870 they were increasingly powered by steam engines rather than by horses. Since steam-powered threshing machines were costly items — running from $ 1,000 to $4,000 — they were usually owned by custom thresher owners who then worked their way from farm to farm during the harvest season. “Combines” were also coming into use on the great wheat ranches in California and the Pacific Northwest. These ponderous machines — sometimes pulled by as many as 40 horses — reaped the grain, threshed it, and bagged it, all in one simultaneous operation.
The adoption of labor-saving machinery had a profound effect upon the sale of agricultural operations in the northern states — allowing farmers to increase vastly their crop acreage. By the end of century, a farmer employing the new machinery could plant and harvest two and half times as much corn as a farmer had using hand methods 50 years before.
托福阅读题目：
1. What aspect of farming in the United States in the nineteenth century does the passage mainly discuss?
(A) How labor-saving machinery increased crop Production
(B) Why southern farms were not as successful as Successful as northern farms
(C) Farming practices before the Civil War
(D) The increase in the number of people farming
2. The word “crucial” in line 4 is closest in meaning to
(A) obvious
(B) unbelievable
(C) important
(D) desirable
3. The phrase “avail themselves” in line 11 is closest in meaning to
(A) take care
(B) make use
(C) get rid
(D) do more
4.According to the passage , why was the Civil War a stimulus for mechanization?
(A) The army needed more grain in order to feed the soldiers.
(B) Technology developed for the war could also the used by farmers.
(C) It was hoped that harvesting more grain would lower the price of grain.
(D) Machines were needed to replace a disappearing labor force.
5. The passage supports which of the following statements about machinery after the Civil War?
(A) Many farmers preferred not to use the new machinery.
(B) Returning laborers replaced the use of machinery.
(C) The use of farm machinery continued to increase.
(D) Poor-quality machinery slowed the pace of crop production.
6. Combines and self-binding reapers were similar because each
(A) could perform more than one function
(B) required relatively little power to operate
(C) was utilized mainly in California
(D) required two people to operate
7. The word “they” in line 19 refers to
(A) grain stalks
(B) threshing machines
(C) steam engines
(D) horses
8. It can be inferred from the passage that most farmers did not own threshing machines because
(A) farmers did not know how to use the new machines
(B) farmers had no space to keep the machines
(C) thresher owner had chance to buy the machines before farmers did
(D) the machines were too expensive for every farmer to own
9. The word “ponderous” in line 21 is closest in meaning to
(A) advanced
(B) heavy
(C) complex
(D) rapid
托福阅读答案：
ACBDCABDB
篇4：托福真题练习TOEFL
By 1776 the fine art of painting as it had developed in western Europe up to this time had been introduced into theAmerican colonies through books and prints, European visitors and immigrants,and traveling colonists who brought back copies (and a few original) of old master paintings and acquaintance with European art institutions.
By the outbreak of the revolution against British rule in 1776, the status of the artists had already undergone change. In the mid-eighteenth century, painters had been willing to assume such artisan-related tasks as varnishing, gilding teaching, keeping shops, and painting wheel carriages, houses, and signs. The terminology by which artists were described at the time suggests their status: “limner” was usually applied to the anonymous portrait painter up to the 1760's;“painter” characterized anyone who could paint a flat surface. By the second half of the century,colonial artists who were trained in England or educated in the classics rejected the status of laborer and thought of themselves as artists. Some colonial urban portraitists, such as John Singleton Copley, Benjamin West, and Charles Wilson Peale, consorted with affluent patrons.
Although subject to fluctuations in their economic status, all three enjoyed sufficient patronage to allow them to maintain an image of themselves as professional artists, an image indicated by their custom of signing their paintings. A few art collectors James Bowdoin III of Boston, William Byrd of Virginian, and the Aliens and Hamiltons of Philadelphia introduced European art traditions to those colonists privileged to visit their galleries, especially aspiring artists, and established in their respective communities the idea of the value of art and the need for institutions devoted to its encouragement.
Although the colonists tended to favor portraits, they also accepted landscapes, historical works, and political engravings as appropriate artistic subjects. With the coming of independence from the British Crown, a sufficient number of artists and their works were available to serve nationalistic purposes. The achievements of the colonial artists, particularly those of Copley, West,and Peale, lent credence to the boast that the new nation was capable of encouraging genius and that political liberty was congenial to the development of taste — a necessary step before art could assume an important role in the new republic.
托福阅读题目：
1. What does the passage mainly discuss?
(A) European influence on colonialAmerican painting
(B) The importance of patronage to artist
(C) The changing status of artists in theAmerican colonies in the eighteenth century
(D) Subjects preferred by artists in theAmerican colonies in the eighteenth century.
2. The word “outbreak” in line 5 is closest in meaning to
(A) cause
(B) beginning
(C) position
(D) explanation
3. The word “undergone” in line 6 is closest in meaning to
(A) led to
(B) transformed
(C) preferred
(D) experienced
4.According to the passage , before the American Revolution the main task of limners was to
(A) paint wheel carriages
(B) paint portraits
(C) varnish furniture
(D) paint flat surfaces
5. It can be inferred from the passage that artists who were trained in England
(A) considered artists to be superior to painters
(B) barely painted portraitists
(C) were often very wealthy
(D) imitated English painters
6. The word “consorted” in line 14 is closest in meaning to
(A) made decisions
(B) studies
(C) agreed
(D) associated
7. The word “sufficient” in line 16 is closest in meaning to
(A) adequate
(B) temporary
(C) friendly
(D) expensive
8.According to the passage , artists such as Copley, West and Peal signed their paintings
(A) increased the monetary value of the paintings
(B) made it more difficult for other artists to copy the paintings
(C) supported the artists' image of professionalism
(D) distinguished colonialAmerican artists from European artists
9. The author mentions James Bowdoin III and William Byrd in line 17 as examples of which of
the following?
(A)Art gallery owners who displayed only European art
(B)Art collectors who had a profound influence on American attitudes toward art
(C)Artists who gave financial support to other artists
(D) Patrons whose helped to encourage artisans to become artists
10. With which of the following would the author be most likely to agree?
(A) Countries that have not had a political revolution are unlikely to develop great art.
(B) The most successful art collectors are usually artists themselves.
(C) The value of colonialAmerican paintings decreased after the Revolution.
(D) Colonial artists made an important contribution to the evolving culture of the new nation.
托福阅读答案：
CBDBADACBD
篇5：TOEFL托福真题练习
TOEFL真题1
托福阅读文本：
Fungi, of which there are over 100,000 species, including yeasts and other single-celled organisms as well as the common molds and mushrooms, were formerly classified as members of the plant kingdom. However, in reality they are very different from plants and today they are placed in a separate group altogether. The principal reason for this is that none of them possesses chlorophyll, and since they cannot synthesize their own carbohydrates, they obtain their supplies either from the breakdown of dead organic matter or from other living organisms. Furthermore the walls of fungal cells are not made of cellulose, as those of plants are, but of another complex sugarlike polymer called chitin, the material from which the hard outer skeletons of shrimps,spiders, and insects are made. The difference between the chemical composition of the cell walls of fungi and those of plants is of enormous importance because it enables the tips of the growing hyphae, the threadlike cells of the fungus, to secrete enzymes that break down the walls of plant cells without having any effect on those of the fungus itself. It is these cellulose-destroying enzymes that enable fungi to attack anything made from wood, wood pulp, cotton, flax, or other plant material.
The destructive power of fungi is impressive. They are a major cause of structural damage to building timbers, a cause of disease in animals and humans, and one of the greatest causes of agricultural losses. Entire crops can be wiped out by fungal attacks both before and after harvesting. Some fungi can grow at +50°C, while others can grow at -5°C, so even food in cold storage may not be completely safe from them. On the other hand, fungi bring about the decomposition of dead organic matter, thus enriching the soil and returning carbon dioxide to the atmosphere. They also enter into a number of mutually beneficial relationships with plants and other organisms. In addition, fungi are the source of many of the most potent antibiotics used in clinical medicine, including penicillin.
托福阅读题目：
1. What does paragraph 1 mainly discuss?
(A) differences between simple and complex fungi
(B) functions of chlorophyll in plants
(C) functions of sugar in the walls of fungal cells
(D) differences between fungi and plants
2. Which of the following is mentioned as a major change in how scientists approach the study of
fungi?
(A) Fungi are no longer classified as plants
(B) Some single-cell organisms are no longer classified as fungi.
(C) New methods of species identification have been introduced
(D) Theories about the chemical composition of fungi have been revised.
3. The word “principal” in line 4 is closest in meaning to
(A) true
(B) main
(C) logical
(D) obvious
4.According to the passage , how do fungi obtain carbohydrates?
(A) The absorb carbohydrates from their own cell walls.
(B) They synthesize chlorophyll to produce carbohydrates.
(C) They produce carbohydrates by breaking down chitin.
(D) They acquire carbohydrates from other organic matter, both living and dead.
5. The passage mentions shrimps, spiders, and insects in line 9 because their skeletons
(A) can be destroyed by fungi
(B) have unusual chemical compositions
(C) contain a material found in the walls of fungal cells
(D) secrete the same enzymes as the walls of fungal cells do
6. Which of the following terms is defined in the passage ?
(A) “chlorophyll” (line 5)
(B) “polymer” (line 8)
(C) “hyphae” (line 12)
(D) “enzymes” (line 14)
7. The word “those” in line 13 refers to
(A) tips
(B) hyphae
(C) enzymes
(D) walls
8. Fungi have all of the following characteristics EXCEPT
(A) They grow hyphae.
(B) They secrete enzymes.
(C) They synthesize cellulose.
(D) They destroy crops.
9. The word “Entire” in line 18 is closest in meaning to
(A) certain
(B) whole
(C) mature
(D) diseased
10. The passage describes the negative effects of fungi on all the following EXCEPT
(A) buildings
(B) animals
(C) food
(D) soil
11. The phrase “bring about” in line 21 is closest in meaning to
(A) cause
(B) join
(C) take
(D) include
12. The passage mentions “penicillin” in line 25 as an example of
(A) a medicine derived from plants
(B) a beneficial use of fungi
(C) a product of the relationship between plants and fungi
(D) a type of fungi that grows at extreme temperatures.
托福阅读答案：
DABDC CDCBD AB
TOEFL真题2
托福阅读文本：
Television has transformed politics in the United States by changing the way in which information is disseminated, by altering political campaigns, and by changing citizen's patterns of response to politics. By giving citizens independent access to the candidates, television diminished the role of the political party in the selection of the major party candidates. By centering politics on the person of the candidate, television accelerated the citizen's focus on character rather than issues.
Television has altered the forms of political communication as well. The messages on which most of us rely are briefer than they once were. The stump speech, a political speech given by traveling politicians and lasting 11/2 to 2 hours, which characterized nineteenth-century political discourse, has given way to the 30-second advertisement and the 10 second “sound bite” in broadcast news. Increasingly the audience for speeches is not that standing in front of the politician but rather the viewing audience who will hear and see a snippet of the speech on the news.
In these abbreviated forms, much of what constituted the traditional political discourse of earlier ages has been lost. In 15 or 30 seconds, a speaker cannot establish the historical context that shaped the issue in question, cannot detail the probable causes of the problem, and cannot examine alternative proposals to argue that one is preferable to others. In snippets, politicians assert but do not argue.
Because television is an intimate medium, speaking through it require a changed political style that was more conversational, personal, and visual than that of the old-style stump speech.Reliance on television means that increasingly our political world contains memorable pictures rather than memorable words. Schools teach us to analyze words and print. However, in a word in which politics is increasingly visual, informed citizenship requires a new set of skills.
Recognizing the power of television's pictures, politicians craft televisual, staged events,called pseudo-event, designed to attract media coverage. Much of the political activity we see on television news has been crafted by politicians, their speechwriters, and their public relations advisers for televised consumption. Sound bites in news and answers to questions in debates increasingly sound like advertisements.
托福阅读题目：
1. What is the main point of the passage ?
(A) Citizens in the United States are now more informed about political issues because of television coverage.
(B) Citizens in the United States prefer to see politicians on television instead of in person.
(C) Politics in the United States has become substantially more controversial since the introduction of television.
(D) Politics in the United States has been significantly changed by television.
2. The word “disseminated” in line 2 is closest in meaning to
(A) analyzed
(B) discussed
(C) spread
(D) stored
3. It can be inferred that before the introduction of television, political parties
(A) had more influence over the selection of political candidates
(B) spent more money to promote their political candidates
(C) attracted more members
(D) received more money
4. The word “accelerated” in line 5 is closest in meaning to
(A) allowed
(B) increased
(C) required
(D) started
5. The author mentions the “stump speech” in line 7 as an example of
(A) an event created by politicians to attract media attention
(B) an interactive discussion between two politicians
(C) a kind of political presentation typical of the nineteenth century
(D) a style of speech common to televised political events
6. The phrase “given way to” in line 10 is closest in meaning to
(A) added interest to
(B) modified
(C) imitated
(D) been replaced by
7. The word “that” in line 12 refers to
(A) audience
(B) broadcast news
(C) politician
(D) advertisement
8. According to the passage , as compared with televised speeches, traditional political discourse
was more successful at
(A) allowing news coverage of political candidates
(B) placing political issues within a historical context
(C) making politics seem more intimate to citizens
(D) providing detailed information about a candidates private behavior
9. The author states that “politicians assert but do not argue” (line 18) in order to suggest that
politicians
(A) make claims without providing reasons for the claims
(B) take stronger positions on issues than in the past
(C) enjoy explaining the issue to broadcasters
(D) dislike having to explain their own positions on issues to citizens
10. The word “Reliance” in line 21 is closest in meaning to
(A) abundance
(B) clarification
(C) dependence
(D) information
11. The purpose of paragraph 4 is to suggest that
(A) politicians will need to learn to become more personal when meeting citizens
(B) politicians who are considered very attractive are favored by citizens over politicians who are
less attractive
(C) citizens tend to favor a politician who analyzed the issue over one who does not
(D) citizens will need to learn how to evaluate visual political images in order to become better
informed
12.According to paragraph 5, staged political events are created so that politicians can
(A) create more time to discuss political issues
(B) obtain more television coverage for themselves
(C) spend more time talking to citizens in person
(D) engages in debates with their opponents
13. Which of the following statements is supported by the passage ?
(A) Political presentations today are more like advertisements than in the past.
(B) Politicians today tend to be more familiar with the views of citizens than in the past.
(C) Citizens today are less informed about a politician's character than in the past.
(D) Political speeches today focus more on details about issues than in the past.
托福阅读答案：
DCABC DABAC DBA
TOEFL真题3
托福阅读文本：
Any rock that has cooled and solidified from a molten state is an igneous rock. Therefore, if the Earth began as a superheated sphere in space, all the rocks making up its crust may well have been igneous and thus the ancestors of all other rocks. Even today, approximately 95 percent of the entire crust is igneous. Periodically, molten material wells out of the Earth's interior to invade the surface layers or to flow onto the surface itself. This material cools into a wide variety of igneous rocks. In the molten state, it is called magma as it pushes into the crust and lava when it runs out onto the surface.
All magma consists basically of a variety of silicate minerals (high in silicon-oxygen compounds), but the chemical composition of any given flow may differ radically from that of any other. The resulting igneous rocks will reflect these differences. Igneous rocks also vary in texture as well as chemistry. Granite, for instance, is a coarse-grained igneous rock whose individual mineral crystals have formed to a size easily seen by the naked eye. A slow rate of cooling has allowed the crystals to reach this size. Normally, slow cooling occurs when the crust is invaded by magma that remains buried well below the surface. Granite may be found on the surface of the contemporary landscape, but from its coarse texture we know that it must have formed through slow cooling at a great depth and later been laid bare by erosion. Igneous rocks with this coarse-grained texture that formed at depth are called plutonic.
On the other hand, if the same magma flows onto the surface and is quickly cooled by the atmosphere, the resulting rock will be fine-grained and appear quite different from granite, although the chemical composition will be identical. This kind of rock is called rhyolite. The most finely grained igneous rock is volcanic glass or obsidian, which has no crystals. Some researchers believe this is because of rapid cooling; others believe it is because of a lack of water vapor and other gases in the lava. The black obsidian cliffs of Yellowstone National Park are the result of a lava flow of basalt running head on into a glacier. Some of the glacier melted on contact, but suddenly there also appeared a huge black mass of glassy stone.
托福阅读题目：
1. In the first paragraph, the author mentions that 95% of the Earth's crust is composed of igneous rock to support the idea that
(A) the Earth began as a molten mass
(B) a thin layer of magma flows beneath the Earth's crust
(C) the minerals found in igneous rock are very common
(D) igneous rock is continually being formed
2. The word “invade” in line 5 is closest in meaning to
(A) move into
(B) neutralize
(C) cover
(D) deposit
3. The word “contemporary” in line 15 is closest in meaning to
(A) vast
(B) natural
(C) existing
(D) uneven
4. The word “it” in line 16 refers to
(A) granite
(B) surface
(C) landscape
(D) texture
5. Granite that has been found above ground has been
(A) pushed up from below the crust by magma
(B) produced during a volcanic explosion
(C) gradually exposed due to erosion
(D) pushed up by the natural shifting of the Earth
6. Which of the following is produced when magma cools rapidly?
(A) granite
(B) plutonic rock
(C) rhyolite
(D) mineral crystals
7. The word “finely” in line 22 is closest in meaning to
(A) minutely
(B) loosely
(C) sensitively
(D) purely
8. Which of the following is another name for volcanic glass?
(A) Plutonic rock
(B) Crystal
(C) Lava
(D) Obsidian
托福阅读答案：
AACAC CAD
TOEFL真题4
托福阅读文本：
Plants are subject to attack and infection by a remarkable variety of symbiotic species and have evolved a diverse array of mechanisms designed to frustrate the potential colonists. These can be divided into preformed or passive defense mechanisms and inducible or active systems.
Passive plant defense comprises physical and chemical barriers that prevent entry of pathogens,such as bacteria, or render tissues unpalatable or toxic to the invader. The external surfaces of plants, in addition to being covered by an epidermis and a waxy cuticle, often carry spiky hairs known as trichomes, which either prevent feeding by insects or may even puncture and kill insect larvae. Other trichomes are sticky and glandular and effectively trap and immobilize insects.
If the physical barriers of the plant are breached, then preformed chemicals may inhibit or kill the intruder, and plant tissues contain a diverse array of toxic or potentially toxic substances, such as resins, tannins, glycosides, and alkaloids, many of which are highly effective deterrents to insects that feed on plants. The success of the Colorado beetle in infesting potatoes, for example,seems to be correlated with its high tolerance to alkaloids that normally repel potential pests.
Other possible chemical defenses, while not directly toxic to the parasite, may inhibit some essential step in the establishment of a parasitic relationship. For example, glycoproteins in plant cell walls may inactivate enzymes that degrade cell walls. These enzymes are often produced by bacteria and fungi.
Active plant defense mechanisms are comparable to the immune system of vertebrate animals,although the cellular and molecular bases are fundamentally different. Both, however, are triggered in reaction to intrusion, implying that the host has some means of recognizing the presence of a foreign organism. The most dramatic example of an inducible plant defense reaction is the hypersensitive response. In the hypersensitive response, cells undergo rapid necrosis — that is, they become diseased and die — after being penetrated by a parasite; the parasite itself subsequently ceases to grow and is therefore restricted to one or a few cells around the entry site.
Several theories have been put forward to explain the basis of hypersensitive resistance.
托福阅读题目：
1. What does the passage mainly discuss?
(A) The success of parasites in resisting plant defense mechanisms
(B) Theories on active plant defense mechanisms
(C) How plant defense mechanisms function
(D) How the immune system of animals and the defense mechanisms of plants differ
2. The phrase “subject to” in line 1 is closest in meaning to
(A) susceptible to
(B) classified by
(C) attractive to
(D) strengthened by
3. The word “puncture” in line 8 is closest in meaning to
(A) pierce
(B) pinch
(C) surround
(D) cover .
4. The word “which” in line 12 refers to
(A) tissues
(B) substances
(C) barriers
(D) insects
5. Which of the following substances does the author mention as NOT necessarily being toxic to
the Colorado beetle?
(A) resins
(B) tannins
(C) glycosides
(D) alkaloids
6. Why does the author mention “glycoproteins” in line 17?
(A) to compare plant defense mechanisms to the immune system of animals
(B) to introduce the discussion of active defense mechanisms in plants
(C) to illustrate how chemicals function in plant defense
(D) to emphasize the importance of physical barriers in plant defense
7. The word “dramatic” in line 23 could best be replaced by
(A) striking
(B) accurate
(C) consistent
(D) appealing
8. Where in the passage does the author describe an active plant-defense reaction?
(A) Lines 1-3
(B) Lines 4-6
(C) Lines 13-15
(D) Lines 24-27
9. The passage most probably continues with a discussion of theories on
(A) the basis of passive plant defense
(B) how chemicals inhibit a parasitic relationship.
(C) how plants produce toxic chemicals
(D) the principles of the hypersensitive response.
托福阅读答案：
CAABD CADD
篇6：TOEFL真题练习
托福阅读文本：
The mineral particles found in soil range in size from microscopic clay particles to large boulders. The most abundant particles — sand, silt, and clay — are the focus of examination in studies of soil texture. Texture is the term used to describe the composite sizes of particles in a soil sample, typically several representative handfuls.
To measure soil texture, the sand, silt, and clay particles are sorted out by size and weight. The weights of each size are then expressed as a percentage of the sample weight. In the field, soil texture can be estimated by extracting a handful of soil and squeezing the damp soil into three basic shapes; (1) cast, a lump formed by squeezing a sample in a clenched fist; (2) thread, a pencil shape formed by rolling soil between the palms; and (3) ribbon, a flatfish shape formed by squeezing a small sample between the thumb and index finger. The behavioral characteristics of the soil when molded into each of these shapes, if they can be formed at all, provide the basis for a general textural classification. The behavior of the soil in the hand test is determined by the amount of clay in the sample. Clay particles are highly cohesive, and when dampened, behave as a plastic. Therefore the higher the clay content in a sample, the more refined and durable the shapes into which it can be molded.
Another method of determining soil texture involves the use of devices called sediment sieves,screens built with a specified mesh size. When the soil is filtered through a group of sieves, each with a different mesh size, the particles become grouped in corresponding size categories. Each category can be weighed to make a textural determination. Although sieves work well for silt, sand, and larger particles, they are not appropriate for clay particles. Clay is far too small to sieve accurately; therefore, in soils with a high proportion of clay, the fine particles are measured on the basis of their settling velocity when suspended in water. Since clays settle so slowly, they are easily segregated from sand and silt. The water can be drawn off and evaporated, leaving a residue of clay, which can be weighed.
托福阅读题目：
1. What does the passage mainly discuss?
(A) Characteristics of high quality soil
(B) Particles typically found in most soils
(C) How a high clay content affects the texture of soil
(D) Ways to determine the texture of soil
2. The author mentions “several representative handfuls” in line 4 in order to show
(A) the range of soil samples
(B) the process by which soil is weighed
(C) the requirements for an adequate soil sample
(D) how small soil particles are weighted
3. The phrase “sorted out” in line 5 is closest in meaning to
(A) mixed
(B) replaced
(C) carried
(D) separated
4. It can be inferred that the names of the three basic shapes mentioned in paragraph 2 reflect
(A) the way the soil is extracted
(B) the results of squeezing the soil
(C) the need to check more than one handful
(D) the difficulty of forming different shapes
5. The word “dampened” in line 14 is closest in meaning to
(A) damaged
(B) stretched
(C) moistened
(D) examined
6. Which of the following can be inferred from the passage about a soil sample with little or no
clay in it?
(A) It is not very heavy.
(B) It may not hold its shape when molded.
(C) Its shape is durable
(D) Its texture cannot be classified
7. The word “they” in line 21 refers to
(A) categories
(B) sieves
(C) larger particles
(D) clay particles
8. It can be inferred from the passage that the sediment sieve has an advantage over the hand test
in determining soil texture because
(A) using the sieve takes less time
(B) the sieve can measure clay
(C) less training is required to use the sieve
(D) the sieve allows for a more exact measure
9. During the procedure described in paragraph 3, when clay particles are placed into water they
(A) stick to the sides of the water container
(B) take some time to sink to the bottom
(C) separate into different sizes
(D) dissolve quickly
10. The word “fine” in line 24 is closest in meaning to
(A) tiny
(B) many
(C) excellent
(D) various
11.All of the following words are defined in the passage EXCEPT
(A) texture (line 3)
(B) ribbon (line 10)
(C) sediment sieves (line 18)
(D) evaporated (line 25)
托福阅读答案：
DADBC BBDBA D
篇7：TOEFL真题练习
In July of 1994, an astounding series of events took place. The world anxiously watched as,every few hours, a hurtling chunk of comet plunged into the atmosphere of Jupiter. All of the twenty-odd fragments, collectively called comet Shoemaker-Levy 9 after its discoverers, were once part of the same object, now dismembered and strung out along the same orbit. This cometary train, glistening like a string of pearls, had been first glimpsed only a few months before its fateful impact with Jupiter, and rather quickly scientists had predicted that the fragments were on a collision course with the giant planet. The impact caused an explosion clearly visible from Earth, a bright flaming fire that quickly expanded as each icy mass incinerated itself. When each fragment slammed at 60 kilometers per second into the dense atmosphere, its immense kinetic energy was transformed into heat, producing a superheated fireball that was ejected back through the tunnel the fragment had made a few seconds earlier. The residues from these explosions left huge black marks on the face of Jupiter, some of which have stretched out to form dark ribbons.
Although this impact event was of considerable scientific import, it especially piqued public curiosity and interest. Photographs of each collision made the evening television newscast and were posted on the Internet. This was possibly the most open scientific endeavor in history. The face of the largest planet in the solar system was changed before our very eyes. And for the very first time, most of humanity came to fully appreciate the fact that we ourselves live on a similar target, a world subject to catastrophe by random assaults from celestial bodies. That realization was a surprise to many, but it should not have been. One of the great truths revealed by the last few decades of planetary exploration is that collisions between bodies of all sizes are relatively commonplace, at least in geologic terms, and were even more frequent in the early solar system.
托福阅读题目：
1. The passage mentions which of the following with respect to the fragments of comet
Shoemaker-Levy 9?
(A) They were once combine in a larger body.
(B) Some of them burned up before entering the atmosphere of Jupiter.
(C) Some of them are still orbiting Jupiter.
(D) They have an unusual orbit.
2. The word “collectively” in line 3 is closest in meaning to
(A) respectively
(B) popularly
(C) also
(D) together
3. The author compares the fragments of comet Shoemaker-Levy 9 to all of the following
EXCEPT
(A) a dismembered body
(B) a train
(C) a pearl necklace
(D) a giant planet
4. Before comet Shoemaker-Levy 9 hit Jupiter in July 1994, scientists
(A) had been unaware of its existence
(B) had been tracking it for only a few months
(C) had observed its breakup into twenty-odd fragments
(D) had decided it would not collide with the planet
5. Before the comet fragments entered the atmosphere of Jupiter, they were most likely
(A) invisible
(B) black
(C) frozen
(D) exploding
6. Superheated fireballs were produced as soon as the fragments of comet Shoemaker- Levy 9
(A) hit the surface of Jupiter
(B) were pulled into Jupiter's orbit
(C) were ejected back through the tunnel
(D) entered the atmosphere of Jupiter
7. The phrase “incinerated itself” in line 9 is closest in meaning to
(A) burned up
(B) broke into smaller pieces
(C) increased its speed
(D) grew in size
8. Which of the following is mentioned as evidence of the explosions that is still visible on
Jupiter?
(A) fireballs
(B) ice masses
(C) black marks
(D) tunnels
9. Paragraph 2 discusses the impact of the comet Shoemaker-Levy 9 primarily in terms of
(A) its importance as an event of great scientific significance
(B) its effect on public awareness of the possibility of damage to Earth
(C) the changes it made to the surface of Jupiter
(D) the effect it had on television broadcasting
10. The “target” in line 20 most probably referred to
(A) Earth
(B) Jupiter
(C) the solar system
(D) a comet
托福阅读答案：
ADDBC DACBA
篇8：TOEFL真题练习
The history of clinical nutrition, or the study of the relationship between health and how the body takes in and utilizes food substances, can be divided into four distinct eras: the first began in the nineteenth century and extended into the early twentieth century when it was recognized for the first time that food contained constituents that were essential for human function and that different foods provided different amounts of these essential agents. Near the end of this era, research studies demonstrated that rapid weight loss was associated with nitrogen imbalance and could only be rectified by providing adequate dietary protein associated with certain foods.
The second era was initiated in the early decades of the twentieth century and might be called “the vitamin period.” Vitamins came to be recognized in foods, and deficiency syndromes were described. As vitamins became recognized as essential food constituents necessary for health, it became tempting to suggest that every disease and condition for which there had been no previous effective treatment might be responsive to vitamin therapy. At that point in time, medical schools started to become more interested in having their curricula integrate nutritional concepts into the basic sciences. Much of the focus of this education was on the recognition of vitamin deficiency symptoms. Herein lay the beginning of what ultimately turned from ignorance to denial of the value of nutritional therapies in medicine. Reckless claims were made for effects of vitamins that went far beyond what could actually be achieved from the use of them.
In the third era of nutritional history in the early 1950's to mid-1960s, vitamin therapy began to fall into disrepute. Concomitant with this, nutrition education in medical schools also became less popular. It was just a decade before this that many drug companies had found their vitamin sales skyrocketing and were quick to supply practicing physicians with generous samples of vitamins and literature extolling the virtue of supplementation for a variety of health-related conditions.
Expectations as to the success of vitamins in disease control were exaggerated. As is known in retrospect, vitamin and mineral therapies are much less effective when applied to health-crisis conditions than when applied to long-term problems of undernutrition that lead to chronic health problems.
托福阅读题目：
1. What does the passage mainly discuss?
(A) The effects of vitamins on the human body
(B) The history of food preferences from the nineteenth century to the present
(C) The stages of development of clinical nutrition as a field of study
(D) Nutritional practices of the nineteenth century
2. It can be inferred from the passage that which of the following discoveries was made during the
first era in the history of nutrition?
(A) Protein was recognized as an essential component of diet.
(B) Vitamins were synthesized from foods.
(C) Effective techniques of weight loss were determined.
(D) Certain foods were found to be harmful to good health.
3. The word “tempting” in line 12 is closest in meaning to
(A) necessary
(B) attractive
(C) realistic
(D) correct
4. It can be inferred from the passage that medical schools began to teach concepts of nutrition in
order to
(A) convince medical doctors to participate in research studies on nutrition
(B) encourage medical doctors to apply concepts of nutrition in the treatment of disease
(C) convince doctors to conduct experimental vitamin therapies on their patients
(D) support the creation of artificial vitamins
5. The word “Reckless” in line 18 is closest in meaning to
(A) recorded
(B) irresponsible
(C) informative
(D) urgent
6. The word 'them“ in line 19 refers to
(A) therapies
(B) claims
(C) effects
(D) vitamins
7. Why did vitamin therapy begin losing favor in the 1950's
(A) The public lost interest in vitamins.
(B) Medical schools stopped teaching nutritional concepts.
(C) Nutritional research was of poor quality
(D) Claims for the effectiveness of vitamin therapy were seen to be exaggerated.
8. The phrase ”concomitant with“ in line 21 is closest in meaning to
(A) in conjunction with
(B) prior to
(C) in dispute with
(D) in regard to
9. The word ”skyrocketing“ in line 23 is closest in meaning to
(A) internationally popular
(B) increasing rapidly
(C) acceptable
(D) surprising
10. The word ”extolling" in line 24 is closest in meaning to
(A) analyzing
(B) questioning
(C) praising
(D) promising
11. The paragraph following the passage most probably discusses
(A) the fourth era of nutrition history
(B) problems associated with undernutrition
(C) how drug companies became successful
(D) why nutrition education lost its appeal
托福阅读答案：
CABBB DDABCA
★ 托福阅读真题解析
★ 雅思写作真题练习
★ 托福写作进阶练习
★ TOEFL试题3
托福真题练习TOEFL（共8篇）
