题目内容
The question that puzzled them is_____ they can get rid of the air pollution in the area.
A. how is it that B. that how C. what is it D. how it is that
D
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题目内容
The question that puzzled them is_____ they can get rid of the air pollution in the area.
A. how is it that B. that how C. what is it D. how it is that
D