—Thelightinhisroomisstillon.Doyouknow

问题详情：

—The light in his room is still on. Do you know _______?

—In order to get ready for the coming exam.

A. why he stays up so late       B. if he works hard

C. what he is doing                D. when he will stop working

【回答】

A

知识点：宾语从句

题型：选择题