I to my cousin’s birthday party last night but I was not available.A. went B. had goneC.

问题补充：

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

答案：

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。