—Lucy doesn’t seem to be what she was.
—No. so much in the war has made her more thoughtful.
A. Seen
B. Her seeing
C. Having seen
D. To have seen
网友回答
A. Seen
(答案→)B. Her seeing
C. Having seen
D. To have seen
解析：本题易误选C。her seeing在句子中作主语，故只能用动名词，不能用分词。