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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1342

They failed to finish the project before the deadline. I regretted __________.

A.to be not able to help B.being not able to help
C.being unable to help D.not to be able to help
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Theyfailedtofinishtheprojectbe