We last night , but we went to the cinema instead .
A. must have studied
B. might study
C. should have studied
D. would study
网友回答
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。