◎ 题干
— Henry doesn't seem to be what he was, does he?
— No. ________ so much in the war has made him more thoughtful.
 [     ]
A. Seen  
B. His seeing
C. Having seen 
D. To have seen
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Henry doesn't seem to be what he was, does he?— No. ________ so much in the war has made him more thoughtful.[ ]A. SeenB. His seeingC. Having seenD. To…”主要考查了你对  【动名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。