问题补充：
—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
答案：
(答案→)A. why he stays up so late
B. if he works hard
C. what he is doing
D. when he will stop working
解析：
试题分析: 句意：他屋内的灯还亮着，你知道为什么他熬夜那么晚吗？为的准备即将到来的考试。why he stays up so late 你知道为什么他熬夜那么晚， if he works hard是否他努力学习，what he is doing他在做什么，when he will stop working他什么时候停下工作。In order to为了， get ready for为……做准备， the coming exam.即将到来的考试。根in order to为了，可知是问原因，故选A
