A.It's a good line
B.The line is  bad 
C.I can hear you 
D.You can't hear me

A.Yes, I could.
B.Sure. 
C.I haven't got it with me.
D.I don't want to.

A.Certainly
B.That's nothing 
C.Yes, you are welcome 
D.Yes, I am glad about it

A.Sorry, I didn't know what you mean.
B.Ok, here you are. 
C.No, I won't.
D.I don't know.

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.