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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 273

The boy         the first prize, but he was so careless as to make a foolish mistake.

A.must have gained B.need have gained
C.could have gained D.shall have gained
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Theboythefirstprize,buthewasso