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【题目】I don’t know _________ . Can you help me?

A. how to do it. B. how to do. C. what to do it.

【答案】A

【解析】句意:我不知道如何做它。你能帮助我吗?作动词know的宾语,用疑问词+to do,what充当动词的宾语,故C项中的it是多于的。how作为状语,后面do有宾语,故排除B项。故选A。

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