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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1740

—Obviously, the boss looks happy again, doesn’t he?
—Yes. It’s said that he has ______ the difficult problem.

A.succeeded in solve B.tried to solve
C.managed to solve D.been solved
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—Obviously,thebosslookshappyag