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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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There _____ a lot of coal mines in the south, but many of them have been closed or are _____ be closed.

A.use to having; about to B.used to be; to
C.use to having; going to D.used to be; supposed to
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Therealotofcoalminesinthesouth