Unit 4 Astronomy: the science of the stars
Ⅰ.单词拼写
1．What do you think of the new ________ (制度)?
2．“What happened？” John's mother asked him in a ________ (温和的) voice.
3．Before the Earth's protective ________ (大气层) was formed, there was no life except in the sea.
4．With the ________ (引力) of the moon and the sun each day, tides (潮汐) roll in and roll away.
5．He managed to finish the race, ________ (不像) more than half of the competitors.
6．His face wore a ________ (困惑的，迷惑的) expression.
7．Eating too many desserts can be ________ (有害的) to one's teeth.
8．The plane ________ (坠毁，碰撞) into the mountain.
9．According to the ________ (理论) of relativity (相对论), nothing can travel faster than light.
10．Most of the evidence had been destroyed. ________ (因此，于是), it was almost impossible to prove him guilty.
答案：1.system 2.gentle 3.atmosphere 4.pull 5.unlike 6.puzzled 7.harmful 8.crashed 9. theory 10.Thus
Ⅱ.完成句子
1．既然已做完了作业，你可以去玩会足球休息一下。
________ ________you've finished your homework, you can go and play football to have a rest.
2．没有什么可以阻止我爱她。
Nothing on earth can________me________loving her.
3．努力干好你的工作，你一定会成功的。
Do your best in your career, and you'll succeed________ ________.
4．甲型流感今年在全球多个国家爆发。
H1N1 flu________ ________in many countries all over the world this year.
5．给玛丽打个电话，她需要鼓励。
Give Mary a call; she needs________ ________.
答案：1.Now that 2.prevent; from 3.in time 4.broke out 5.cheering up
