Thatroom________myfather'slibraryb

发布时间：2020-07-26 00:56:45

That room ________ my father's library but now it is my bedroom．A.was used to beB.used to beingC.used to beD.is used to be

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C解析be used to do sth．“被用来做某事”；used to doing sth．无此结构；used to do sth．“过去常常做某事”，隐含有现在不再如此了．
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