We ______ last night, but we went to the cinema instead.
A. must have studied
B. might study
C. should have studied
D. would study
正确答案：C
7．答案为C我们昨晚本应学习但是我们去电影院了should+现在完成式表示过去应做却没有做到的事
We______lastnightbutwewenttothecinemainsteadAm
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