each other for years, they talked almost the whole night and had a wonderful time.
A. Not having seen
B. Having not seen
C. Not seen
D. Not to see
网友回答
(答案→)A. Not having seen
B. Having not seen
C. Not seen
D. Not to see
解析：句意：彼此几年没有见面了，他们谈论了一个晚上，玩得很愉快。这里需要非谓语动词做状语，因为they和see是主动关系，排除C，因为是先很多年没见，然后才交谈很久，所以用现在分词的完成式，否定词not放在having前面，所以选A。