—The light in his room is still on. Do you know ?
—Maybe at midnight again.
- A.what’s he doing
- B.why he stays up so late
- C.if he is busy studying
- D.when he will stop working
答案
正确答案：D
知识点：宾语从句
根据选项和答语“也许又到半夜了”可知，询问的应该是“他什么时候会停止工作”。所以只有D选项比较符合题意。
略
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