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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 531

After visiting Harbin, most of the foreign friends said they would never forget the time ________ they had spent.

A.that B.what
C.when D.at which
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AftervisitingHarbin,mostofthef