题目内容

She doesn't know . If you have time, you can give her a hand.

A. how to do B. what can she do

C. what to do it D. how to do it

D 【解析】句意:她不知道怎么做它,如果你有时间,你帮她一下。疑问词引导的宾语从句用陈述语序,所以排除B;疑问词后用不定式做宾语,因为do后要有宾语,how是疑问副词,不能做宾语,所以排除A;what是疑问代词可以做宾语,所以do后不用再接it,所以排除C;故选D
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