His a_______ is to become a great scientist in the future.

A camera, a glove, a hand tool, even a toothbrush… they are all up there, above the clouds, going around and around the Earth. There are also thousands of pieces of metal and plastic. Some of them are only about the size of a fingernail. Many are much larger. Scientists consider all these objects to be space junk, and they are a problem.

　　　 Since people first launched rockets into space in the 1950s, we have been leaving behind all sorts of things. Much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart. Sometimes larger pieces survive the extreme heat through the atmosphere and hit the ground or the ocean at great speeds.

　　　 But space junk falling on housetops is not the biggest worry. Scientists are concerned about the Kessler syndrome. It is named after the American scientist who first thought of the idea in 1978. Imagine what happens when an empty rocket strikes another while orbiting the Earth. Two big things become many smaller things. They then hit other things. The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.

　　　 Marco Castronuovo, an Italian Space Agency researcher, suggested launching a satellite into space that would get very close to some of the larger pieces of space junk. The satellite would connect a small rocket to the useless object. When the rocket explodes, it pushes the junk into a lower and slower orbit, nearer the Earth. After a time, the junk burns up in the atmosphere.

　　　 Scientists have been concerned about space junk for many years. Right now, the costs of the clean- up have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.

67.　 What does the underlined part “space junk” in Paragraph 1 refer to?

A.It refers to small pieces of things that were once bigger objects.

B.It refers to objects that survived the extreme heat through the atmosphere.

C.It refers to clouds that are made up of small objects in space.

D.It refers to all kinds of objects that have been left behind in space.

68.Why do scientists consider the Kessler syndrome a big problem?

A.Space junk clouds are likely to block the path of spacecraft.

B.An empty rocket might strike a spacecraft orbiting the Earth.

C.Space junk might fall onto the Earth, causing damage.

D.Space junk becomes bigger and bigger until hard to get rid of.

69.What is mainly talked about in the passage?

A.Smaller objects come together to form clouds of space junk.

B.Human beings are responsible for space junk.

C.Space junk is a big problem human beings have to find ways to solve.

D.An Italian researcher has found a good way to remove space junk.

70.What is the author’s attitude towards Marco Castronuovo’s method of cleaning up space junk?

A.　 Doubtful. 　　　　　　 B.　 Objective.　　　　　　 C.　 Favorable.　　 D.　 Disapproving.

阅读下列短文，从每题所给的四个选项A、B、C、D中，选出最佳选项.

　　What is good education? Is it one that covers as much as possible of human history and achievements, past and present? Or one that gives graduates the ability to find employment promptly when they leave school? Is it a broad education or a specialized one? Should it provide students with a vast collection of facts, or merely train them to think? Should a future engineer gain only the knowledge that will enable him to do his job properly, or would a richer background improve his professional ability as well as his personal life? The debate goes on and on, with good arguments on both sides.

　　In the eighteenth and the nineteenth centuries, the question was not even worth asking. A good education was, of course, a broad one based on the humanities. An educated man knew “something about everything”. He was familiar with the great deeds and the great ideas of the past. He had read extensively; He was able to use his own language correctly and often elegantly. He could join in any conversation about plants, planets, painters, or politics. He was at ease in the world, and he knew that his education world open to him any career that he might want to try. Even if he was mostly interested in literature, he had some knowledge of the sciences and the techniques of his time.

　　But sciences and techniques have changed a great deal since the part of the nineteenth century, and the world has changed too. It has become more complex and increasingly specialized．There is much more to know in every field．It is not only the scientist and the physician who need a long special training now. But the administrator, the computer expert, the accountant, and the business manager. Besides, the multiplication of college graduates had made the competition for jobs much harder than it used to be. The best qualified, the expert, wins.

(1)According to the passage, what is a good education?

[　　]

A．Education that makes college students find employment very quickly.

B．Education that provides a student with rich knowledge in every field．

C．Not mentioned in the passage.

D．Education that makes a person become the expert in his special field．

(2)Which of the following pairs of arguments is NOT on good education?

[　　]

A．Education throughout history and education for students finding jobs

B．Education in broad sense and education in special sense.

C．Education for examination and education for quality.

D．Education for finding employment and education for commanding knoeledge.

(3)Which of the following statements about an educated man in the 18~19th century is NOT true?

[　　]

A．He was able to use his own language gracefully.

B．If he was interested in literature, he had to learn some knowledge of science and technique.

C．He had read various books

D．he was familiar with much knowledge in various fields.

(4)What should a modern man do to find employment?

[　　]

A．No matter what career he wants to try, he needs a long special training.

B．He needs to command all the knowledge related to his career.

C．He has to read extensively.

D．He should be familiar with everything in every field．

(5)Why is it very difficult for a college student to find employment?

[　　]

A．Because college education is useless.

B．Because students didn't master adequate skills.

C．Because their education wouldn't open to them the career they wanted to try.

D．Because the number of college student is increasing.

阅读下列短文，从每题所给的四个选项A、B、C、D中，选出最佳选项.

　　What is good education? Is it one that covers as much as possible of human history and achievements, past and present? Or one that gives graduates the ability to find employment promptly when they leave school? Is it a broad education or a specialized one? Should it provide students with a vast collection of facts, or merely train them to think? Should a future engineer gain only the knowledge that will enable him to do his job properly, or would a richer background improve his professional ability as well as his personal life? The debate goes on and on, with good arguments on both sides.

　　In the eighteenth and the nineteenth centuries, the question was not even worth asking. A good education was, of course, a broad one based on the humanities. An educated man knew “something about everything”. He was familiar with the great deeds and the great ideas of the past. He had read extensively; He was able to use his own language correctly and often elegantly. He could join in any conversation about plants, planets, painters, or politics. He was at ease in the world, and he knew that his education world open to him any career that he might want to try. Even if he was mostly interested in literature, he had some knowledge of the sciences and the techniques of his time.

　　But sciences and techniques have changed a great deal since the part of the nineteenth century, and the world has changed too. It has become more complex and increasingly specialized．There is much more to know in every field．It is not only the scientist and the physician who need a long special training now. But the administrator, the computer expert, the accountant, and the business manager. Besides, the multiplication of college graduates had made the competition for jobs much harder than it used to be. The best qualified, the expert, wins.

(1)According to the passage, what is a good education?

[　　]

A．Education that makes college students find employment very quickly.

B．Education that provides a student with rich knowledge in every field．

C．Not mentioned in the passage.

D．Education that makes a person become the expert in his special field．

(2)Which of the following pairs of arguments is NOT on good education?

[　　]

A．Education throughout history and education for students finding jobs

B．Education in broad sense and education in special sense.

C．Education for examination and education for quality.

D．Education for finding employment and education for commanding knoeledge.

(3)Which of the following statements about an educated man in the 18~19th century is NOT true?

[　　]

A．He was able to use his own language gracefully.

B．If he was interested in literature, he had to learn some knowledge of science and technique.

C．He had read various books

D．he was familiar with much knowledge in various fields.

(4)What should a modern man do to find employment?

[　　]

A．No matter what career he wants to try, he needs a long special training.

B．He needs to command all the knowledge related to his career.

C．He has to read extensively.

D．He should be familiar with everything in every field．

(5)Why is it very difficult for a college student to find employment?

[　　]

A．Because college education is useless.

B．Because students didn't master adequate skills.

C．Because their education wouldn't open to them the career they wanted to try.

D．Because the number of college student is increasing.