题目内容
【题目】—The light in his office is still on. Do you know __________?
—To prepare for the mid-term exam.
A.if he works hard
B.why he keeps working
C.why is he so busy
D.when he will stop working
【答案】B
【解析】句意：--他的办公室的灯还亮着。你知道他为什么一直在工作吗？--为了期中考试做准备。宾语从句用陈述句语序，故排除C，根据回答可知提问原因。故选B
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