A.the 
B.an 
C.a 
D./

A.You have it too.
B.You do too.
C.The same as you
D.The same to you.

A.You got it too 
B.The same to you 
C.Yes, thank you 
D.The same as you

A.don't you 
B.haven't you 
C.shall we 
D.will you

A.No,thank you 
B.You are happy, too 
C.Yes, we are happy 
D.The same to you

A.Happy birthday to you
B.I'm very glad 
C.That's all right
D.Thank you

A.Happy birthday to you! 
B.I am very glad． 
C.That's all right．
D.Thank you．

A.would catch
B.would have caught
C.could catch 
D.should catch

A.The same to you. 
B.That's OK. 
C.See you.  
D.Long time no see.

A.I don't know. 
B.I'd rather not say. 
C.Well, guess.
D.Yes, we have.

A.I'm pleased. 
B.Good night. 
C.Not so bad. And you? 
D.How do you do?