The worsening of global warming, human activities are to blame, has led to frequently extr

发布时间：2020-08-16 18:39:24

The worsening of global warming,     human activities are to blame, has led to frequently extreme weather.
A. by which
B. for which
C. that
D. what

网友回答

A. by which
(答案→)B. for which
C. that
D. what
解析：blame后面接宾语需要加介词for,故选B.
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