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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 272

— What were you and your sister doing when the telephone rang?
— I          while my sister was eating.

A.sleep B.am sleeping
C.slept D.was sleeping
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—Whatwereyouandyoursisterdoing