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. that it is how D. how it is that
【答案】
D
【解析】
试题分析:考查表语从句。此处是强调句型的特殊疑问句做表语从句,语序为:疑问词+it +is +that+被强调部分,故答案选D。句意:使他们困惑的是他们如何才能去除这个地区的空气污染。
考点:考查表语从句。
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