– Did Alan enjoy seeing his old friend yesterday?
-- Yes, he did. He his old friend for a long time.
A. didn’t see
B. hadn’t seen
C. hasn’t seen
D. wouldn’t see
网友回答
A. didn’t see
(答案→)B. hadn’t seen
C. hasn’t seen
D. wouldn’t see
解析：这题考查时态，句意是：Alan昨天喜欢看见老朋友吗？--是，他很长时间没看见老朋友了。因为没看见老朋友是在昨天之前，所以用过去完成时。选B。