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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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___ had they reached the 30th floor ____ they realized that they had forgotten to take the key.

A.Hardly; than B.Hardly; when C.No sooner; when D.No sooner; then
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hadtheyreachedthe30thfloorthey