问题补充:
The questionnew measures should be taken to control the terrible air pollution ispuzzles scientists a lot.
A. that; what
B. which; that
C. what; what
D. which; that
答案:
A. that; what
B. which; that
(答案→)C. what; what
D. which; that
解析:考查同位语从句和表语从句。句意:应该采取什么样的新措施来控制空气污染的问题,是让科学家非常困惑的事情。根据句意可知,既然是question,就说明措施并不明确,应该是“什么样的new measures”,that引导同位语从句时,没有词义,不选A;is后的表语从句缺少主语,排除B、D;故选C。
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