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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 653

In our class,when the bell rang and the teacher closed his book,it was a ________for everyone to stand up.

A.signal
B.chance
C.mark
D.measure
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Inourclass,whenthebellrangandt