We are faced with the problem _________ we should do with so much pollution.A．wh_刷题宝

题干

We are faced with the problem _________ we should do with so much pollution.

A．what

B．why

C．that

D．That

上一题下一题 0.64难度单项选择更新时间:2015-03-26 07:34:30

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