题目内容

【题目】There is no difference between the two words. I really don't know________.

A. what to choose B. which to choose C. to choose which D. to choose what

【答案】B

【解析】know, expect, decide等动词后面可以接疑问词加to do不定式结构，句子意思为“不知道该选择哪一个”。故选B

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