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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 900


The students were studying in     classroom when, all of      sudden,the lights went out.

A.不填;不填 B.a;the C.the;a D.the;不填
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Thestudentswerestudyinginclass