Question

一Why didn't you come to Mike’s birthday party yesterday?

—Well，I　　 , but I had something important to do at the moment.

A．should　 　 B．must　 　 C．should have 　 　　　 D．must have

 

Answer 1

C

 

考查情态动词和省略。should have在这里相当于should have come to Mike’s birthday party，即“我本应该去参加Mike的生日晚会的”。should have done表“本应该做某事(但实际上未做)”，其他选项不合题意。