I to my cousin’s birthday party last night，but I was not available. (2013·安徽，28)
A. went
B. had gone
C. would go
D. would have gone
网友回答
A. went
B. had gone
C. would go
D. would have gone
解析：D
解析 考查虚拟语气。句意为：昨晚，我本该去参加我表弟的生日聚会，但我没有时间。would have done“本该做(但未做)”。