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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 1665

—The light is still on in his room. Do you know ___________ ?
—Maybe he has to study for a test.

A.if he works hard
B.who he is studying with
C.what he is busy with
D.when he will stop working
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—Thelightisstilloninhisroom.Do