必修3 Unit 4
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
