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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1341

I regret _____ hard at school, or I would have succeeded in passing the exam.

A.not to work B.having not worked
C.to have not worked D.not having worked
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Iregrethardatschool,orIwouldha