Allthebooksarefine．Idon’tknow

发布时间：2020-07-27 20:32:51

All the books are fine．I don’t know ________．A.to choose which oneB.to choose what oneC.which one to chooseD.what one to choose

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C解析疑问词加动词不定式相当于名词性从句。
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