I don’t know .A．whattodoitB．howtodoC．whattodoD．todowhat 题目和参考答案——青夏教育精英家教网—

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I don’t know _________.

A．whattodoit

B．howtodo

C．whattodo

D．todowhat

考查非谓语动词. 疑问词加不定式作用相当于一个宾语从句，句意:我不知道做什么.选项AD结构有误,选项Bhow不能做宾语,故选C.

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