—Sorry indeed I to your birthday party if …—Forget it. I know you were out on business.A

问题补充：

—Sorry indeed, I to your birthday party if …

—Forget it. I know you were out on business.

A. must come

B. would come

C. must have come

D. would have come

答案：

A. must come

B. would come

C. must have come

(答案→)D. would have come

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