—Thelightsinhisroomarestillon．Doyouknow    ? —Theexamis...

问题详情：

—The lights in his room are still on．Do you know     ?  —The exam is coming．

    A．why does he stay up so late  B．why he stays up so late

    C．what is he doing                D．what he is doing

【回答】

B

知识点：宾语从句

题型：选择题