I to my cousin’s birthday party last night, but I was not available.
A. went
B. had gone
C. would go
D. would have gone
网友回答
A. went
B. had gone
C. would go
(答案→)D. would have gone
解析：句意：昨晚我本来会去参见我的表弟的生日聚会的，但是我没有空。从but I was not available.可知是表示对过去事情的假设，用“would+have+done”意思是“本来会做却没有做”。结合语境可知选D。