Who has eyes can see what great achievements we have made si

29． When it thunders, we always see the light before we hear the sound．______ It’s because

A． our eyes are in front of our ears

B． our eyes are cleverer than our ears

C． our eyes can see but our ears can-t

D．light goes faster than sound

It is reported ________great changes have been made.

A.which

B.that

C.while

D.what

A.option

B.energy

C.ideas

D.potential

If we work with a strong will, we can overcome any difficulty, what great it is.()

You can’t imagine what she had gone ( ) before she made such great achievements.

A、along

B、around

C、through

D、by

听力原文：W: How are you getting on with your experiment?

M: In spite of my continuous failure, I have already made some progress.

What can we learn about the man's enperiment ?

A．It is going on well.

B．It has failed several times.

C．It will soon be finished.

D．It may have to be stopped.

Passage Two

When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.

People who are nearsighted can only see things that are very close to their eyes. Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly'.

People who are nearsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.

Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.

Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out

of the other eye. You will find the object's relation to the background (背景) and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.

40. We should take good care of our eyes ______.

A. only when we cannot see perfectly

B. only when we can see well

C. even if we can see well

D. only when we realize how important our eyes are

189. What will man be like in the future—in 5,000 or even 50,000 years from now? We can only make a guess, 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 a 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 too: 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 a 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? This 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. [共5题]

(1) Future man is likely to be different from us ________.

(A) in quite a few ways (B) in almost every way

(C) in great many ways (D) in one or two ways

(2) The reason for believing that future man will be different is that man ________.

(A) began to change five hundred years ago

(B) never stops changing

(C) never stops growing

(D) has recently begun to change

(3) People’s heads will eventually grow larger. This is because their brains ________.

(A) will grow faster than at present

(B) will need more room than at present

(C) will play an important part

(D) will be in constant use

(4) Future man will probably ________.

(A) have bigger eyes (B) get weaker eyes

(C) see better (D) have to wear better glasses

(5) Future man’s hair will ________.

(A) grow darker (B) stop growing completely

(C) fall out more often (D) get longer

A.advance

B.progress

C.contribution

D.Achievement

What can we infer from the passage?

A) Human can be totally replaced by machines in agriculture.

B) We cannot see mechanization in Africa,

C) As long as adaptations been made, mechanization will be used in agriculture in tropical area.

D) The number of farmers who run a farm in America is less then thai of the farmer who run a farm of under developed countries.