21. Einstein developed __________(理论)of relativity.

15．转折点____________________　　 20.worm virus ________________

14．登陆，着陆 ________________　　 19.give permission to _________

13．自由勋章___________________　　 18. one giant leap____________

12．试图_______________________　　 17. cut short________________　

11．海军飞行员_________________　　 16. out of control ____________

根据以下有关姜海个人情况介绍，以 My Friend Jiang Hai 　为题，写一篇介绍他的短文。

要求： 用第三人称; 所给信息必须全部用上;词数：80左右。

Name: Jiang Hai

Age: 16

Address: 69 Park Road Suzhou

Occupation(职业): student

Favourite subjects: art and music

Weekday activities: swimming and working

Usual Saturday activity: having parties

Usual Sunday activity: watching TV

______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

The year 1970 was World Conservation (保护)Year. Everyone must know that the world is in 51 . Here is one example of the problem. At one time there was 1300 different kinds of trees and flowers in Holland(荷兰), 52 only 866 remains(继续存在). The others have been destroyed by modern man. We are 　53 　the earth, the air and the water, and everything that grows and lives. If we go on like this, we shall destroy 　54 .

What will happen in the future? Perhaps it is more 　55 　to ask “ what must we do now?” The people 　56 　will be living in the world tomorrow are the young of today. A lot of them know that conservation is necessary. 57 　are helping to save our world. Now fifteen million young people in many countries are paying attention to the relationship(关系) between man and the country 　58 　them. In some countries they 　59 　much time as “conservation volunteers”. They plant trees and help to 　60 　wild birds and animals.

But everyone, not only young people, must work to save our world.

51.(　　 )A. safety　 　　　B. difficulty　　　 C. beauty　　　　 D. danger

52.(　　 )A. but　　　　 B. just　　　　 　　C. or　　　　　 D. and

53.(　　 )A. making　　　 B. building　　　 C. changing　　　 D. cleaning

54.(　　 )A. itself　　　 　B. us　　　　　　 C. themselves　 　D. ourselves

55.(　　 )A. interesting　　 B. difficult　 　　C. dangerous　 　　D. important

56.(　　 )A. whom　　　 　B. who　　　 　　C. whose　　　　 D. what

57.(　　 )A. Much　　 　　B. A few　　　 　C. Many　　　　 D. A little

58.(　　 )A. with　　　　 B. about　　　　 C. around　　 　D. among

59.(　　 )A. take　　　　　 B. cost　　　　 C. spend　　　 　D. have

60.(　　 )A. stop　　　　　 B. protect　　　 C. catch　　　 　D. keep