—Would you like to join me for a quick lunch before class? — but I promised Nancy to go

问题补充：

—Would you like to join me for a quick lunch before class?

— , but I promised Nancy to go out with her.

A. I’d like to

B. I like it.

C. I don’t

D. I will

答案：

(答案→)A. I’d like to

B. I like it.

C. I don’t

D. I will

解析：从对话上文可知是回答对方的请求。I’d like to 与上文呼应。