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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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—Have you found the missing?couple in the mountain ?
—No, but we     hard to get in touch with them.     

A.have tried B.have been trying
C.had tried D.had been trying .
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—Haveyoufoundthemissing?couple