. The child enjoyed _____ up the wooden bricks then knocking them down.

A. adding           B. pushing          C. piling            D. forming

　　Trees are useful to man in three very important ways: they provide him with wood and other products, they give him shade, and they help to prevent drought 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 draw quick profit from the trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had.

　　Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire but, without its trees, its soil became hard and poor. When the empire fell to pieces, the country found itself faced by floods and starvation.

　　Even though a government realizes the importance of a plentiful supply of trees, it is difficult for it to persuade the villager to see this. The villager wants wood to cook his food with, and he can earn money by making charcoal or selling wood to the townsman. He is usually too lazy or too careless to plant and look after trees. So unless the government has a good system of control, or can educate the people, the forests will slowly disappear.

　　This does not only mean that the villagers? sons and grandsons have fewer trees. The results are even more serious. For where there are trees their roots break the soil up—allowing the rain to sink in and also hold the soil, thus preventing it being washed away easily, but where there are no trees, the soil becomes hard and poor. The rain falls on hard ground and flows away on the surface, causing floods and carrying away with it the rich topsoil, in which crops grow so well. When all the topsoil is gone, nothing remains but a worthless desert.

63. The purpose that the writer wrote this article for is ____ .

　A. to tell people that trees are very useful to man

　B. to warn people not to cut down trees any more

　C. to warn that man mustn't destroy forests any more

　D. to explain how trees help to prevent drought and floods

64. In the writer's opinion, ____ , or the forests slowly disappear.

　A. measure must be taken                      B. people shouldn't draw benefit from the tree

　C. government must realize the serious results      D. unless trees never be cut down

65. According to the article we know it is ____ to prevent the forests from slowly disappearing.

　A. necessary but impossible                    B. necessary but difficult

　C. impossible and unimportant                  D. difficult and impossible

66. In the last two paragraphs the writer wanted to make it clear that ____ .

　A. where there are no trees, the soil becomes hard and poor

　B. where there are many trees, there are fewer floods

　C. where there are no trees, the land might become desert slowly

　D. floods will make the land become desert

  No race war is worse than _______ inside single family.

　 A. it 　 B. that C. one 　 D. war

  If you _____ it , I will lend the book to you.

　 A. read 　 B. will read C. have read 　 D. were reading

  After the new technique was introduced, the factory produced______ tractors in 1998 as the year before.

　 A. as many twice 　 B. as twice as many

　 C. twice as many 　 D. twice many as

  Instead, he seemed to see Tom ’s face, with the wide smile he ______ whenever he told a joke.

A. wore 　 B. brought  C. appeared 　 D. carried

  If my brother is allowed to go out, ______.

　 A. so should I 　 B. so am I  C. so should I 　 D. so I am

Washington — The largest ozone (臭氧)hole ever observed has opened up over Antarctica, according to the scientists of the US National Aeronautics and Space Administration (NASA). They believe it is a sign that ozone — destroying gases produced years ago are just now causing the largest quantities of ozone to disappear.

　　This year’s South Pole ozone hole spreads over about 28.5 million square kilometers, an area three times larger than the landmass of the United States.

　　Pictures of the hole have been offered by NASA. The hole appears as a giant blue mass, totally covering Antarctica and stretching to the southern tip of South America.

　　“The last time the ozone hole was close to this size was in 1998, when it spread over about 27.2 million square kilometers,” NASA said.

　　Paul Newman, who works with NASA’s Total Ozone Mapping Spectrometer (TOMS) instrument on a NASA satellite, said ozone watchers had expected a big hole this year, but not this big.

　　The Antarctica ozone hole, first observed in 1985, is caused by the depletion (損耗) of Earth protecting ozone by human-made chemicals such as chlorofluorocarbons, known as CFCs.

　　“Even though these chemicals were not allowed to use from the beginning of 1987, they remain in the atmosphere and will continue to do so for years,” Newman said.

　　“This year’s large hole may have been caused by a change in a swirling high-level air current over Antarctica, which circles the area and contains the zone hole,” Newman said.

56. The text is mainly about ____ .

　 A. the discovery of the largest ozone hole           B. the discovery of the Antarctica ozone hole

　 C. the history of the Antarctica ozone hole          D. the size of the largest ozone hole

57. The time 1985 was talked about in the text because it was when the Antarctica ozone hole ____ .

　 A. was watched by Newman   B. was first closed   C. disappeared   　 D. was first watched

58. There is a giant ozone hole over Antarctica because ____ over there.

　 A. human-made chemicals have protected ozone     B. ozone has protected the earth

　 C. human-made chemicals have destroyed ozone     D. human-made chemicals have increased ozone

You know that widely reading helps ______ your knowledge so I can’t help _____ the housework every day.

　 A. an large, doing 　 B. to rich, to do  C. add, to 　 D. add to, doing

The teacher asked us to put weekends ______ good use.

　 A. with 　 B. in   C. for 　 D. to