Would you like to join me for a quick lunch before class? （） but I promised Tom to go out with him.

A.I'm afraid so
B.No, I'm sorry not
C.I'm afraid not
D.It's my pleasure

A.No, I already have plans.
B.I'd love to, but I'm busy tonight
C.No, I really don't like being with you
D.I'm ill, so I shouldn't go out.

A.OK. Let's go.
B.You are welcome
C.But I have nothing else to do.
D.Not bad.