A.No, no way.
B.No, I couldn't.  
C.No, I can't. 
D.Sorry I can't. I have to go to a meeting right now.

A.No, no way.  
B.No, I couldn't.
C.No, I can't. 
D.Sorry I can't. I have to go to a meeting right now.

A.No, no way
B.No, I couldn't.
C.No, I can't.
D.Sorry I can't. I have an appointment right now.

A.No  problem 
B.I hope so
C.That's all right
D.That's a good idea

A.How's that.  
B.Sure. What can I do for you? 
C.Not at all.
D.Which one?

A.I could not
B.Yes．I think so
C.I'm afraid so
D.I'm afraid not

A.All right. 
B.Is that all?
C.Just a few.  
D.Let me see.

A.It's well.
B.It doesn't matter.
C.By all means
D.I have no idea.

A.Speaking, please.
B.Oh, how are you？
C.I'm listening.    
D.I'm Don't

A.I'm listening.
B.Oh, how are you？
C.Speaking, please.
D.I'm Don't