Before a problem can be solved, it must be obvious the problem itself is. A. whatB. thatC.

发布时间：2020-08-17 06:08:21

Before a problem can be solved, it must be obvious     the problem itself is.
A. what
B. that
C. which
D. why

网友回答

(答案→)A. what
B. that
C. which
D. why
解析：考查主语从句：句意：在问题解决之前，问题本身是什么必须明确。it在句中做形式主语，真正的主语是what the problem itself is ，what在主语从句中做表语，选A。
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