问题补充：
---- Pity you missed the lecture on nuclear pollution.
---- I it, but was busy preparing for a job interview.
A. would have attended
B. had attended
C. would attend
D. attended
答案：
(答案→)A. would have attended
B. had attended
C. would attend
D. attended
解析：这是两个人之间的对话。第一个人说：“很遗憾你错过了核污染的讲座。” 第二个人说： “我本打算去的，但是忙于一次工作面试”。对过去情况的虚拟，主句用“ would/ should/ might/ could + have + 过去分词，所以选A。
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