Question

— The light is still on in his room. Do you know          ?
— Maybe he has to study for a test.

A．if he works hard	B．who he is studying with
C．what he is busy with	D．when he will stop working

Answer 1

C

试题分析：句意： --他房间里的灯仍然亮着。你知道他在忙你什么吗？---或许他必须为考试复习呢。此处考查宾语从句，根据答语“或许他必须为考试复习呢”，应该问他在做什么，应用what来提问。故选C。