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素能提升演练（十四）
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.
