1. (2016·海南) 根据句意及所给的词首字母或汉语提示，补全单词。（注意： 须把完整的单词写在答题卡的相应位置）

1. （1） As we know, the m goes round the earth.

3. （2） Bill u gets home at 6:00, but today he didn't gethome until 7:00.
   

5. （3） After working for several hours, he was t and fell asleep soon.

7. （4） The student s are having a (化学) class in the lab.

9. （5） We shouldn't waste water. Instead, we should (节约) it.