— I missed the earliest flight in the morning. It was really a pity. —You to the airport

问题补充：

— I missed the earliest flight in the morning. It was really a pity.

—You to the airport by taxi instead of by bus.

A. should go

B. should have left

C. should leave

D. must have gone

答案：

A. should go

(答案→)B. should have left

C. should leave

D. must have gone

解析：考查情态动词的完成式的用法：句意：--我今天早上错过了最早的航班，真遗憾。--你本应该乘出租车而不是乘公共汽车去机场的。从时态看是说过去的事情，用情态动词+完成式，should havedone本应该做而没有做，must have done过去一定做了，选B。