-- I to your birthday party last Sunday!
-- Unfortunately, you were on business.
A. had e
B. came
C. would e
D. would have e
网友回答
A. had e
B. came
C. would e
(答案→)D. would have e
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。