----You part in the party in time.
----Sorry I was delayed by the accident.
A. are supposed to take
B. have supposed to take
C. are supposed to have taken
D. supposed to take
网友回答
A. are supposed to take
B. have supposed to take
(答案→)C. are supposed to have taken
D. supposed to take
解析：考查固定用法。“你本应该及时参加晚会的。”“对不起，我被事故给耽搁了。”be supposed to do sth.“应该做某事”，相当于should do sth.，+have done意为“本应该做某事”。故选C。