1.A. All right. B. Fine, thank you. C.The same to you.
2.A.You are welcome. B. That's OK. C.It 's not allowed.
3. A.Good idea. B. I like it. C. It's delicious.
4.A. It's my pleasure. B. I'm surprised. C. Just a little, please.
5.A. I'd love to. B.It's interesting. C. Sorry to hear that.