——Guess what！I met an old school friend last week.
——How nice！How long each other？
A. didn't you see
B. haven't you seen
C. hadn't you seen
D. don't you see
网友回答
A. didn't you see
B. haven't you seen
(答案→)C. hadn't you seen
D. don't you see
解析：考查时态：句意：--猜怎么了！ 我上个星期遇到了一个老朋友。--真好！你们多长时间没有见面了？因为上星期见过面了，所以这里是指上星期前多久没有见面了，用过去完成时，选C。