We last night, but we went to the concert instead, so we failed in the examinati
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We ________ last night, but we went to the concert instead, so we failed in the examination．
[]A．should study
B．must study
C．should have studied
D．must have studied
试题答案
答案：C
解析：观察题干可知：有表示过去的时间状语last night。后面又有表示转折的连词but，下文所提供的选项是学习。综合在一起：我们昨天晚上应学习，而我们却去听音乐会，所以我们考试不及格。上引可知句意是责备我们昨晚本该学习而没有学习，却去听音乐会。 |