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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1929

Only when our project has been approved of by the committee ______ to carry it out.

A.did we start B.we started
C.can we start D.we start
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Onlywhenourprojecthasbeenappro