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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 580

– Why you didn’t handed in your exercise paper?
–Sorry, but I ____ that it should be turned in today.

A.didn’t know B.hadn’t known
C.haven’t known D.don’t know
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–Whyyoudidn’thandedinyourexerc