It is interesting how NASA(美国航空航天管理局)chose their astronauts for landing them on the moon. They chose men  26  the age of twenty and thirty-five. There were about fifty of them, Many were  27  air pilots.  28 were scientists with two or three degrees. NASA telephoned each man they were going to choose; told him the plans and the  29  they might get in. They then asked him if he was willing to be trained as an astronaut. “How could any man  30 such an exciting job?” One of them said, “Dangerous? Of course. It’s dangerous  31 most exciting”
The health and physical condition of  32 was, of course, very necessary.  33  those in very good health and physical condition were chosen.
While being trained to be astronauts. They went through many  34 . They studied the star and the moon, and they also studied geology, the science of rocks. This was necessary  35  astronauts would have to look for rocks on the moon. They would try to find rocks which might help to tell the  36 of the moon. They were all  37 to fly in helicopters （直升飞机）。These helicopters landed  38 down to give them some experience of the way the spaceship would  39 land on the moon , They were also taught the  40  facts about the conditions in space. They learnt all the technical details of the spaceships and rockets. They visited the scientists and engineers who  41 them. They visited the factories where they were  42. They learnt how every 43 of a space-ship and its instruments work. They also learnt every detail of ground-control  44 .
In a word, to be chosen as an astronaut. One must be in good health,  45  in science and good at piloting.

It is interesting how NASA(美国航空航天管理局)chose their astronauts for landing them on the moon. They chose men  26  the age of twenty and thirty-five. There were about fifty of them, Many were  27  air pilots.  28 were scientists with two or three degrees. NASA telephoned each man they were going to choose; told him the plans and the  29  they might get in. They then asked him if he was willing to be trained as an astronaut. “How could any man  30 such an exciting job?” One of them said, “Dangerous? Of course. It’s dangerous  31 most exciting”

The health and physical condition of  32 was, of course, very necessary.  33  those in very good health and physical condition were chosen.

While being trained to be astronauts. They went through many  34 . They studied the star and the moon, and they also studied geology, the science of rocks. This was necessary  35  astronauts would have to look for rocks on the moon. They would try to find rocks which might help to tell the  36 of the moon. They were all  37 to fly in helicopters （直升飞机）。These helicopters landed  38 down to give them some experience of the way the spaceship would  39 land on the moon , They were also taught the  40  facts about the conditions in space. They learnt all the technical details of the spaceships and rockets. They visited the scientists and engineers who  41 them. They visited the factories where they were  42. They learnt how every 43 of a space-ship and its instruments work. They also learnt every detail of ground-control  44 .

In a word, to be chosen as an astronaut. One must be in good health,  45  in science and good at piloting.

A man living absolutely alone in a desert or forest is free from other people; but he is not absolutely free. His freedom is limited in several ways. Firstly, by the things around him, such as wild animals or cliffs too steep (陡峭的) to climb. Secondly, by his own needs: he must have sleep, water, food and shelter from extreme heat or cold. Lastly, by his own nature as a man: disease may attack him, and death will certainly come to him sooner or later.

When men live together, on the other hand, protection against wild animals is easier and they can work together to get food and build shelters; but each man has to give up some of his freedom so that he can live happily with the others.

When men become organized into very large groups, and civilization (文明) develops, it is possible to get freedom from hunger, thirst, cold, heat and many diseases, so that each person can live a happier life than he could if he were living alone; but such a society can not work successfully unless the freedom of each human being is to some extent limited so that he is kept from hurting others. I am not free to kill others, nor to steal someone else's property, nor to behave in a way that offends (触犯) against the moral sense of the society in which I live. I have to limit my own freedom myself so that others will not limit it too much: I agree to respect the rights of others, and in return they agree to respect mine.

   The advantages of such an agreement are great: one man can become a doctor, knowing that others will grow food, make clothes and build a house for him, in return for the work he does to keep them healthy. If each man had to grow his own food, make his own clothes, build his own house and learn to be his own doctor, he would find it impossible to do any one of these jobs really well. By working together, we make it possible for society to provide us all with food, clothes, shelter and medical care, while leaving each of us with as much freedom as it can.

A man living alone in a desert or forest ______.

A. is completely free      B. feels rather lonely 

C. has limited freedom     D. enjoys no freedom

The author suggests that when men live together ______.

A. they will have no freedom and have to help others.

B. they can help each other protect against wild animals.

C. they have to work for their own food and shelters

D. everyone’s happiness is at the expense of other people’s freedom.

According to the passage, to do all his own jobs one would ______.

A. enjoy a complete freedom.

B. find it a happy thing to do everything at his own will

C. find it a very hard job to deal with everything by himself

D. feel quite fantastic and encouraged.

We may infer from the passage that the author ____.

A. is against separation from a civilized society.

B. is in favor of a well-organized society.

C. is against freedom gained at others.

D. denies the existence of many-sided people

According to an old story, a farmer once found that a bag of corn had been stolen from his house. He went to the judge and told him about his loss. The judge ordered all the people of the farm to come before him. He took a number of sticks of equal length and gave one stick to each man.

　 He then said, “Come before me again tomorrow. I shall then know which of you is the thief because the stick given to the thief will be one inch longer than the others.”

　 The thief was afraid of being found out, and so he cut an inch off his stick. The next day the thief’s stick was found to be one inch shorter than any of the others. In this way the thief was found out, and was at once taken away to prison.

1.The judge gave each man a stick _______.

A. to change back the farmer’s corn

B. to beat the thief

C. as a tool to find out the thief

D. so as to play a game together

2.Since the thief cut the stick short, ________.

A. he was found out

B. the judge couldn’t catch him

C. his stick had an equal length with the others’

D. his stick wouldn’t be any longer

3.The wise way the judge found out the thief in the end was to make ______.

A. the thief cut the stick off

B. the thief cut an inch off the stick

C. the stick grow an inch longer

D. the other’s sticks would become one inch shorter

A recent experiment held in Japan shows that it is almost impossible for people to walk exactly straight for 60 metres. Tokyo University of Agriculture and Technology found 20 healthy men and asked them to walk as straight as possible to a target 60 metres away at normal speed. Each man had to walk on white paper fixed flat to the floor wearing wet colored socks. The footprints revealed that all walked in a winding rather than a straight line. Researchers found that people readjust the direction of walking every few seconds. The amount of the winding differed from subject to subject. This suggests that none of us can walk in a strictly straight line. We walk in a winding way mainly because of a slight structural or functional imbalance of our limbs (四肢). Although we may start walking in a straight line, several steps afterwards we have changed direction.

?? Eyesight helps us to correct the direction of walking and leads us to the target. Your ears also help you walk. After turning around a lot with your eyes closed, you can hardly stand still, let alone walk straight.

?? It’s all because your ears help you balance. Inside your inner ear there is a structure which contains liquids. On the sides of the organ are many tiny hair-like structures that move around as the liquid flows. When you spin (旋转) the liquid inside also spins. The difference is that when you stop, the liquid continues to spin for a while. Dizziness is the result of these nerves in your ear. When you open your eyes, although your eyesight tells you to walk in a straight line, your brain will trust your ears more, thus you walk in a curved line.

1.The experiment held in Japan proved that _______.

A. the participants kept readjusting their direction of walking

B. all the participants had a good sense of direction

C. the experiment was done in different ways

D. none of the participants finished the 60 metres

2.The underlined word “subject” in Para. 1 refers to ________.

A. a person with a functional imbalance

B. a person chosen to be studied in an experiment

C. the subject one studies at school

D. the direction of walking

3.The purpose of writing the article is to ________.

A. prove that ears and eyes help us to walk straight

B. explain why we can hardly walk in a strictly straight line

C. point out the importance of noticing everyday science

D. give background information about a latest study