含答案
二、翻译(根据中文提示完成句子)（共5小题；共5分）
18. 大部分水不可饮用。
isn't drinkable.
19. 他每两小时休息一下。
He rests .
20. 早起不容易。
get up early.
21. 我们通过修理滴水的水龙头节约水。
We save water by tap.
22. 人们怎样处理脏水？
How do people ?
三、选词填空(单句选词填空)（共5小题；共5分）
23. About 70 of our body is made up of water. (percent; percentage)
24. What can we do to save water? (else; other)
25. Oceans about 75% of the Earth. (cover; make )
26. A bath uses about as much water as a shower. (two; twice )
27. can we save water at home? (What; How )