-- I to your birthday party last Sunday!-- Unfortunately you were on business.A. had com

问题补充：

-- I to your birthday party last Sunday!

-- Unfortunately, you were on business.

A. had come

B. came

C. would come

D. would have come

答案：

A. had come

B. came

C. would come

(答案→)D. would have come

解析：考查时态，根据第二句Unfortunately, you were on business可知，第一个人没有参加生日聚会，因此第一空是虚拟语气，意为，我本打算要去参加你的生日聚会的，---不幸的是，你当时在出差。