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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1698

-----Why? I didn’t get you on the phone.
-----We ________ football on the playground when you phoned.

A.must be playing B.must play
C.must have played D.must have been playing
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Why?Ididn’tgetyouonthephone.We