—The light in his room is still on. Do you know??____________? —In order to prepare for

题目内容(请给出正确答案)

—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

参考答案和解析
正确答案:B
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