[外语类试卷]大学英语四级(阅读)模拟试卷24及答案与解析.doc
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1、大学英语四级(阅读)模拟试卷 24及答案与解析 Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice. 0 The greenhouse effect causes trouble by raisi
2、ng the temperature of the planet. The【 1】 rise is not very much, but the Earths ecosystem is very weak, and small changes can have large effects. It has been believed that this【 2】 of one degree will happen by the year 2025. This could probably【 3】 the North American corn belt, which produces much o
3、f the worlds grain,【 4】 to much higher food prices, and even less food for the Third World than they already have. However, it would also mean that some countries which are further north would be able to【 5】 crops they had never been able to before, although there is less land as you move north from
4、 the corn belt. The other serious worry is that rising sea levels from the melting of the polar ice could【 6】 flood many countries. A rise in sea levels of one meter, which many experts are【 7】 by the year 2100 (and some as soon as 2030), would flood 15 percent of Egypt, and 12 percent of Bangladesh
5、. The Maldives in the Indian Ocean would almost【 8】disappear. Most of the countries which would suffer most from a rise in sea levels are the poor【 9】 states, so the islands in the Caribbean, South Pacific, Mediterranean and Indian Ocean have formed the Alliance of Small Island States, AOSIS, so the
6、y have a【 10】voice in international politics and can make the richer developed world listen to their problems. A. severely B. damage C. island D. critical E. grow F. mainland G. louder H. predicting I. rise J. completely K. geometry L. actual M. extending N. leading O. develop 1 【 1】 2 【 2】 3 【 3】 4
7、 【 4】 5 【 5】 6 【 6】 7 【 7】 8 【 8】 9 【 9】 10 【 10】 10 Many people wonder why some men want to live on the moon. It is【 1】 not the kind of place where most men would choose to live. But man has always moved to new areas. Some scientists hope that continued work will be done on the moon. Many experimen
8、ts will be done there more【 2】 . Some large【 3】 are very easy to do in a place without air. Matter can be heated to very high temperatures without【 4】 change when it is in such a place. Air, dust, and clouds cannot【 5】 mans view of space from the moon. The very high or very low temperatures and low
9、gravity on the moon will be used for many experiments. One very important use of the moon will be to【 6】 spaceship. Man might be able to learn much about his own body by living on the moon. He would be living in a habitat that he made for himself. Man would be in control of the【 7】 of life in which
10、he lives.【 8】 could be removed from the air in this community. Gravity is the one thing that would not be under mans control. Some scientists believe the low gravity of the moon would be【 9】 for man. The heart would not have to work so hard. The body would need less energy to move than it does on th
11、e earth. However, the human body might change during long stays on the moon. Much exercise would probably be needed to keep the body in good【 10】 . A. community B. condition C. launch D. insight E. chemical F. mysterious G. experiments H. probably I. healthful J. easily K. extend L. render M. prompt
12、ly N. block O. bacteria 11 【 1】 12 【 2】 13 【 3】 14 【 4】 15 【 5】 16 【 6】 17 【 7】 18 【 8】 19 【 9】 20 【 10】 20 People who live in heavily industrialized areas do not get as much sunlight as they should. Dust【 1】 over a city at altitudes (海拔 ) of between 4,000 and 8,000 feet cuts out between 20 and 50 p
13、ercent of the sunlight and up to 90 percent of the ultraviolet light (紫外线 ). But dust is not the only thing to【 2】 about. When fuels are burned, whether in a factory, or in a home, or in the engine of a car, CO2 is given off. CO2 in the atmosphere acts as a kind of 【 3】 around the earth, keeping war
14、ms in and so slowly raising the【 4】of the earth. This could really change the climate all over the world. Everybody wants to have a car.【 5】 , while they are giving us so much pleasure, cars are also poisoning us. The amount of dangerous substances sent out by a car is quite【 6】 . Did you know, for
15、example, that a hundred cars produce on【 7】 a third of a ton of CO, as well as many other【 8】 substances every day? Now, more and more people are realizing the importance of clean air. Schools are now teaching about the pollution problems. Scientists and engineers are trying to【 9】 new engines for c
16、ars. But what about the millions of cars already in use? Must they all be dirown away? It might be very【 10】 to change them so that they, too, are pollution-free. A. forge B. screen C. expensive D. floating E. unfortunately F. average G. poisonous H. develop I. temperature J. surprising K. overtakin
17、g L. essential M. regulation N. generously O. worry 21 【 1】 22 【 2】 23 【 3】 24 【 4】 25 【 5】 26 【 6】 27 【 7】 28 【 8】 29 【 9】 30 【 10】 30 Unless measures are taken at once, there is a possibility that all the oceans of the world will be dead by the next century. How can this possibly happen? We have a
18、lready seen that people【 1】 all kinds of waste products to be thrown into the sea. It is almost【 2】 to measure how much industrial waste ends up in our oceans, but we can【 3】 how much oil is poured into them according to the law and against the law. It is against the law to pour oil into the sea【 4】
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