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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 718

—Look! Somebody ______the blackboard.
—Well, it wasn't me.I didn't do it.

A.is cleaning B.was cleaning
C.had cleaned D.has cleaned
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—Look!Somebodytheblackboard.—W