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 Someonecalledmeupinthemiddleofthenight,buttheyhungup

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问题详情:

 Someonecalledmeupinthemiddleofthenight,buttheyhungup

 Someone called me up in the middle of the night,but they hung up ________ I could answer the phone. A. as        B. since        C. until        D. before

【回答】

D

知识点:连词

题型:选择题

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