问题补充：
The teacher went up to the sleeping student and patted him on the head, .
A. waking him up
B. to wake him away
C. woke him up
D. waken him away
答案：
(答案→)A. waking him up
B. to wake him away
C. woke him up
D. waken him away
解析： 考查现在分词做伴随状语：句意：老师朝睡觉的学生走过去，拍拍他的头，把他叫醒。这里的把他叫醒和前面的拍拍头，是同时发生，是伴随状语，因为是主动，所以是现在分词，不是不定式，如果是不定式做目的状语，前面是没有逗号的，“叫醒”是wake up，选A。
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