根据所给汉语完成下列句子.
吴老师告诉我们不要浪费水
Mr.wu told us __ __ __ __.
我们必须阻止他们污染空气.
We must prevent __ __ __ __.
对我们来说,学好英语很重要.
It's __ __ __ __ learn english well.
小明知道完成作业才睡觉
Xiaoming __ go to bed __ he finishes his homework
他记得已经打扫了教室
He remembered __ the __.
用英语解释下列句子
1.Why don't you pump the bike?
2.Saving water is very important.
3.It took me 5 years to learn english.
4.We can't live without water.
5.I didn't go to bed until he came back.