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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1245

When the students heard the alarm, they all hurried to        they thought was an emergency exit door.

A.what B.which C.where D.who
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Whenthestudentsheardthealarm,t