【題目】______ 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】

考查名詞性從句。句意：讓人極大困惑的是他如何在沒有別人幫助的情況下做到這一點的。表示“讓人困惑的事情”用what引導主語從句，表示“如何做到的”用how表方式，引導表語從句。故選B.

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