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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1470

—The light in his room is still on.Do you know________?
—In order to prepare for the coming exam.

A.if he works hard
B.why he stays up so late
C.why is he so busy
D.when he will stop working
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—Thelightinhisroomisstillon.Do