I think that something has to be done to stop the air from being polluted, _____

题干

I think that something has to be done to stop the air from being polluted, ______ ?

A．doesn't it

B．don’t I

C．don't they

D．haven't they

上一题下一题 0.64难度单项选择更新时间:2013-11-13 10:53:23

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