问题补充：
He was down all evening, but as soon as his girl friend came in he .
A. came to life
B. was free of charge
C. knocked into
D. got close to
答案：
(答案→)A. came to life
B. was free of charge
C. knocked into
D. got close to
解析：句意：一整个晚上他都闷闷不乐的，但是他的女朋友一进来，他就活跃起来。come to life 苏醒过来，活跃起来。所以选A。
