—Sorry the tickets have already been sold out.—Really? Maybe I a little earlier.A. shoul

问题补充：

—Sorry, the tickets have already been sold out.

—Really? Maybe I a little earlier.

A. should come

B. should have come

C. could have come

D. must have come

答案：

A. should come

(答案→)B. should have come

C. could have come

D. must have come

解析：考查情态动词表推测。根据句意：—票都已经卖完了。—真的吗？或许我本该早点来。用should have done表示“本应该干某事”对过去的猜测。C项为“本可以早点来”；D项为“肯定早来了”。所以答案选B。