It is human activity has caused this global warming.A. whichB. thatC. whatD. why

发布时间：2020-08-16 21:10:58

It is human activity      has caused this global warming.
A. which
B. that
C. what
D. why

网友回答

A. which
(答案→)B. that
C. what
D. why
解析：考查强调句型。本句强调句子的主语。可以把it is 和that去掉，句子Human activity has caused this global warming.句意：正是人类的活动导致了全球变暖。
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