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  • 更新 2022-09-03
  • 科目 英语
  • 题型 选择题
  • 难度 中等
  • 浏览 2047

—Has David finished his project yet?
—I guess not. He        on it at lunchtime. Do you want me to confirm it?

A.is working B.was working
C.has worked D.had worked
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—HasDavidfinishedhisprojectyet