问题补充:
-- Why didn’t you go to Mike’s birthday party yesterday?
-- Well, I , but I forgot it.
A. should
B. would
C. should have
D. must have
答案:
A. should
B. would
(答案→)C. should have
D. must have
解析:这是一组对话。上文,昨天,你为什么没去参加Mike的生日聚会?下文,我本应该去的,但是我忘记了。Should have done本该做某事,而实际上没有做某事。