2. Passage Twenty-One What will man be like in the future—in 5，000 or even 50，000 years from now? We can only make guesses， of course， but we can be sure that he will be different from what he is today. For man is slowly changing all the time. Let us take an obvious example. Man， even five hundred years ago， was shorter than he is today. Now， on average， men are about three inches taller. Five hundred years is relatively short period of time， so we may assume that man will continue to grow taller. Again， in the modern world we use our brains a great deal. Even so， we still make use of only about 20% of the brain’s capacity. As time goes on， however， we shall have to use our brains more and more， and eventually we shall need larger ones. This is likely to bring about a physical change to the head， in particular the forehead will grow larger. Nowadays our eyes are in constant use. In fact， we use them so much that very often they become weaker and we have to wear glasses. But over very long period of time it is likely that man’s eyes will grow stronger. On the other hand， we tend to make less use of our arms and legs. These， as a result， are likely to grow weaker. At the same time， however， our fingers will grow more sensitive because they are used a great deal in modern life. But what about hair? It will probably disappear from the body altogether in course of time because it does not serve a useful purpose any longer. In the future， then， both sexes are likely to be bald. Perhaps all this gives the impression that future man will not be a very attractive creature to look at. This may well be true. All the same， in spite of all these changes， future man will still have a lot in common with us. He will still be a human being， with thoughts and emotions similar to our own.The evidence that man is changing is that ( ) .

35. People who won’t work should be made (_____)_.

A. 　 to work

B. 　 work

C. 　 has been done

D. 　 to be working

3. Passage Sixteen Justin was always prepared. His motto was “Never throw anything out， you never know when it might come in handy.” His bedroom was so full of flat bicycle tires， bent tennis rackets， deflated basketballs， and games with missing pieces that you could barely get in the door. His parents asked him to clean out his room. “What use is a fish tank with a hole in the bottom?” his father asked. But Justin simply smiled and repeated his motto， “Never throw anything out， you never know when it might come in handy.” When Justin was away from home， he always carried his blue backpack. He liked to think of it as a smaller version of his bedroom——a place to store the many objects that he collected. It was so worn and stretched that it hardly resembled a backpack anymore. It was full of the kind of things that seemed unimportant， but when used with a little imagination， might come in handy. Justin had earned a reputation for figuring things out and getting people out of otherwise hopeless situations. Many of his classmates and neighbors sought him out when they needed help with a problem. On the first day of school， his friend Kenny， came looking for Justin. “Do you think you have something in your bag that could help me remember my locker code?” he asked. “I lost the paper it was written on. I have science class in two minutes and if I’m late on the first day it’ll make me look bad for the rest of the year.” Kenny looked genuinely worried. “Relax，” Justin said， taking his backpack off and opened it. “Remember how you borrowed my notebook in hometown to write the code down? Well， I know how we can recover what you wrote. ” He took the notebook and a soft lead pencil out of his bag. The page that Kenny had written on had left faint indentations (旧凹痕) on another page in the notebook. Justin held the pencil on its side and rubbed it lightly over the indentations. Slowly but surely the numbers of the locker code appeared in white， set off by the gray pencil rubbings. “That’s amazing!” Kenny said. “I owe you one.” And he dashed off to open his locker. How does Justin help his friends?

A. He offers them advice.

B. He loans them his backpack.

C. He listens to their problems.

D. He uses the objects in his backpack.

34. The terrible weather eventually (_____) our holiday

A. 　 destroyed

B. 　 damaged

C. 　 spoiled

D. 　 defeated

48. It wasn’t until nearly a month later () I received the manager’s reply.

A. 　 since

B. 　 when

C. 　 as

D. 　 that

1. Passage One There are three separate sources of danger in supplying energy by nuclear power. First， the radioactive material must travel from its place of production to the power station. Although the power stations themselves are strongly built， the containers used for the transport of the materials are not. Normally， only two methods of transport are in use， namely road or rail. Unfortunately， both of these may have an effect on the general public， since they are sure to pass near， or even through， heavily populated areas. Second， there is the problem of waste. All nuclear power stations produce wastes that in most cases will remain radioactive for thousands of years. It is impossible to make these wastes nonradioactive， so they must be stored in one of the inconvenient ways that scientists have invented. For example， they may be buried under the ground， or dropped into deserted mines， or sunk in the sea. However， these methods do not solve the problem， since an earthquake could easily break the containers.
Third， there may occur the danger of a leak or an explosion at the power station. Compared with the other two dangers， this is not very likely， so it does not provide a serious objection to the nuclear program. However， it can happen. Separately， these three types of dangers are not a great cause for worry. Taken together， though， the probability of disaster is extremely high. Which of the following is FALSE?

A. It is possible that a leak or an explosion occurs at a power station.

B. It is unusual for radioactive materials to be transported across land.

C. The containers are likely to be broken by an earthquake.

D. Nuclear wastes remain dangerous in most cases for many years.

37. Does everyone on earth have an equal right (_____)_ an equal share of its resources?

A. 　 by

B. 　 at

C. 　 to

D. 　 over

47. The Great Wall is a great tourist (_____)drawing millions of visitors every year.

A. 　 attention

B. 　 arrangement

C. 　 attraction

D. 　 appointment

5. Passage Thirteen Trees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they help to prevent droughts and floods. Unfortunately， in many parts of the world， man has not realized that the third of these services is the most important. In his eagerness to make money from trees， he has cut them down in large numbers， only to find that without them he has lost the best friends he had. And besides， he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees， their roots break up soil——allowing the rain to sink in——and also bind the soil， thus preventing it from being washed away easily; but where there are no trees， the rain falls on hard ground and flows away， causing floods and carrying away the rich top-soil. When all the top-soil is gone， nothing remains but worthless desert. Two thousand years ago a rich and powerful country cut down its trees to build warships， with which to gain itself an empire. It set up the empire but， without its trees， its soil became poor and it grew weak. When the empire fell to pieces， the home country found itself faced with floods and starvation.What does the author tell us in this passage?

A. How trees help prevent droughts and floods.

B. The relationship between trees and man.

C. How an empire fell to pieces in ancient times.

D. A story of trees.

31. The conference (_____)_ a full week by the time it ends.

A. 　 must have lasted

B. 　 will have lasted

C. 　 would last

D. 　 has lasted

45. They consider (_____)_ the budget should be adjusted each time it is implemented.

A. 　 it necessary that

B. 　 that it necessary

C. 　 necessary that

D. 　 necessary of it that