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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1655

While I_______ a detective story, someone_______ at the door.

A.read, was knocking
B.read, knocked
C.was reading, knocked
D.was reading, was knocking
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WhileIadetectivestory,someonea