Question

We      last night, but we went to the party instead.

A．must have studied

B．might study

C．should have studied

D．would study

Answer 1

C

试题分析：考查should have done本该做…而没做，句意：我们昨晚本该学习的，但去参加聚会了。Must have done过去一定做了。选C。
点评：考查情态动词+have done的用法：指过去情况对推测和虚拟，should have done本该做…而没做，shouldn’t have done本不该做…而做，Must have done过去一定做了might have done过去可能做了，等。