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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 643

There is a crowd of people in front of the house over there. What do you suppose
_____ there?

A.is happened B.has happened
C.happening D.to have happened
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Thereisacrowdofpeopleinfrontof