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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 476

While I _________ a novel, someone_________ at the door.

A.read; was knocking
B.read; knocked
C.was reading; knocked
D.was reading; was knocking
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WhileIanovel,someoneatthedoor.