托福阅读的思维方式就是托福阅读的出题方式，只有掌握了这种思维方式，才有可能在做题之前，预测到新托福阅读题的出题形式和特点，为找答案节省时间。老托福阅读试题的核心价值，在于其最贴近真题的阅读思维方式。此外老托福阅读真题比新托福IBT阅读文章要短，比较容易适应。这也是大家在备考托福的时候非常重要的一点。因为前期的入手如果能从容易的开始，就会形成一个循序渐进的过程方式，让大家的练习有一个提高的过程。
既然老托福阅读试题有这样的效果，那我们如何利用那有限的真题来达到锻炼自己的目的呢？事实上这就一个办法，就是坚持。本期为大家推荐老托福阅读的真题PASSAGE 15，附有原文及答案，希望对托福考生备考有所帮助。
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.
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.
正确答案： DABDC CDCBD AB
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