—I have to be at the office by noon tomorrow. My co-workers are taking me out for a final

问题补充：

—I have to be at the office by noon tomorrow. My co-workers are taking me out for a final good-bye lunch.

— Where are you going to eat?

—I don’t know. They want to treat me.

A. I don’t know.

B. How nice!

C. It’s my pleasure.

D. It’s none of my business.

答案：

A. I don’t know.

(答案→)B. How nice!

C. It’s my pleasure.

D. It’s none of my business.

解析：考查交际用语;A. I don’t know. 我不知道，B. How nice!多好啊！C. It’s my pleasure. 不用谢，D. It’s none of my business.和我无关，句意是;--明天中午我要在办公室。我的同事要代我出去吃告别午餐。--真好，你们要去哪里吃？--我不知道，他们请我。选B。