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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 2103

When you are sleeping, you had better______ all the windows closed.                                    

A.don’t keep B.not keep
C.not to keep D.not keeping
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Whenyouaresleeping,youhadbette