ShuQing________adoctor,butnowshe

发布时间：2020-07-26 04:13:48

Shu Qing ________ a doctor, but now she is a teacher.A.was used to beB.used toC.was used to beingD.used to be

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D解析used to do sth.“过去常常做某事”，固定搭配。
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