题目内容

【题目】______ has caused great confusion is ______ he made it without anyone else’s help.

A. What; that. B. What; how. C. It; how. D. It; that.

【答案】B

【解析】

考查名词性从句。句意：让人极大困惑的是他如何在没有别人帮助的情况下做到这一点的。表示“让人困惑的事情”用what引导主语从句，表示“如何做到的”用how表方式，引导表语从句。故选B.

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