问题
选择题
The old teacher lay wide awake on his bed, ___________ all the problems he had to deal with the next day.
A．thought about
B．to think about
C．thinking about
D．having thought about
答案
答案：C
这位老教师在床上行者想着第二天不得不解决所有问题。考查分词作伴随状语。to do表目的结果，having done发生在位于动作之前。