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【题目】I have no doubt that he will make it, but I wonder ______ he is really ready enough.

A.what B.why C.whether D.that

【答案】C

【解析】句意:我不怀疑他会成功,但是我很疑惑他是否真的准备好了。本题考查宾语从句。宾语从句的成分完整,所以排除连接代词what;根据句意,此处缺少“是否”的意思,所以答案选择whether;B项why表示“为什么”;D项that在宾语从句不缺主要成分,不缺意思时使用。

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