I was not in Beijing last June, otherwise I my son’s graduation ceremony．
A. would not miss
B. didn’t miss
C. would not have missed
D. had not missed
网友回答
A. would not miss
B. didn’t miss
(答案→)C. would not have missed
D. had not missed
解析：此句考察的是被动语态，意思是“我会参加我儿子的毕业典礼的”，事实上并未参加，与过去事实相反，固使用would have done