Unit 2 Saving the Earth
词句巩固练习
I. 单项选择。
1.— How long ________ you ________ here?
— For about two years so far.
A.have; studied B.did; live C.do; stay D.were; swimming
2.We have known each other ________ ten years ago.
A.for B.ever C.about D.since
3.There is ________pollution in the world. We must stop it.
A. much too B.too much C.many too D.too many
4.The boss made child laborers ________12 hours every day.
A.working B.works C.work D.to work
5.________ the environment is important for human beings.
A.Take care of B.Taking care of C.Took care of D.Take the care of
6.When I was walking in the street yesterday, I saw a UFO ________ over my head.
A.flying B.flies C.flew &
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