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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1898

The doctors in Shenzhen did all they ______ to save Yao Beina, a famous singer, but she still died.

A.would B.could C.must D.Might
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ThedoctorsinShenzhendidallthey