Question

【题目】—The light in his office is still on. Do you know ?

—To work on a very important project.

A. if he works hard B. why he keeps working

C. why is he so busy D. when he will stop working

Answer 1

【答案】B

【解析】句意：——他的办公室的灯仍然亮着，你知道他为什么一直工作吗？——为了完成一个非常重要的项目。根据Do you know可知，本题考查宾语从句，宾语从句中一般为陈述语序，选项C是疑问语序，所以排除掉；再根据“To work on a very important project.”可知，动词不定式to引导的句子在这里表示原因，提问的话应该用why，故答案选B。