We last night but we went to the cinema instead . A. must have studied B. might studyC.

问题补充：

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

A. must have studied

B. might study

C. should have studied

D. would study

答案：

A. must have studied

B. might study

(答案→)C. should have studied

D. would study

解析：“should + have +p . p”表示过去本应该做而实际未做之事，有抱怨、责备之意。