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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 297

The scientists are beating their brains trying to _______ a solution to the problem.

A.come about B.come across C.come out D.come up with
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Thescientistsarebeatingtheirbr