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He was very busy yesterday, otherwise, he ____ to your birthday party.
A、would come
B、came
C、would have come
D、should come
【正确答案】：C
【题目解析】：本题考查虚拟语气。【要点透析】由 otherwise可知,后一分句描述的是与过去事实相反的推测,因此用 would havedone,表示与过去相反的情况。