4. 虽然我很喜欢它，但我不会买它，因为它太贵了。

　　________________， I won't buy it, for it's too expensive.

　　5. 那一事件引出一连串谁都没有料到的事。

　　The incident sparked off ________________ events that nobody had foreseen.

　　Ⅳ.完形填空

　　For thousands of millions of years the moon has been going round the earth. During this time, the moon has been the __1__ satellite of the earth. Today, __2__， the earth has many other satellites all __3__ by man. These man­made satellites are very much smaller than the moon. However, some of them will still be going __4__ the earth thousands of years from now.

　　Man­made satellites do not __5__ because they are going too fast to do so. As they speed along, they __6__ to go straight off into space. They __7__ out of the earth, or its gravity, which __8__ them from doing this. As a result, they travel in an orbit round the earth.

　　If a man­made satellite travels about at a certain height, it can keep going __9__ round the earth, just like the moon. This is __10__ it is above the atmosphere, and there is nothing to __11__ it down. If it travels __12__ than that, it will be slowed down so much that it will __13__ the earth.

　　Men have __14__ spaceships to the moon and to the two __15__ planets: Mars (火星) and Venus (金星). By putting a camera on __16__ the spaceship to the moon, men have been able to __17__ photographs of the other side of the moon. This side is always __18__ from us as the moon circles the earth. The __19__ are later transmitted by radio to the earth. They showed that the other side of the __20__ is very much the same as the side that turns towards us.　　　　　　　　　　　　　　　　　

　　1. A.biggest B. brightest

　　C. last D. only

　　2. A.besides B. however

　　C. though D. therefore

　　3. A.assumed B. discovered

　　C. made D. foresaw

　　4. A.through B. round

　　C. behind D. after

　　5. A.fall B. rise

　　C. burst D. pause

　　6. A.decide B. wish

　　C. plan D. tend

7. A.pull B. reach