A. B. C. D. E.
A.—Don't eat my cake! —I'm sorry.
B.—Would you like a sweet? —Yes, please.
C.—Is this your book? —Yes, it is.
D.—Don't sit here, Yang Ling. —OK
— ____ my new bag.
—____
A.What's this?
B.Would you like some milk?
C.Shh! Don't shout here.
D.Don't drink in the library.
A: Hello, Yang Ling!
B:
A: Oh, I'm sorry. Look at my shirt.
B: It's nice.
A: It's milk.
B: No, thank you.
A: Oh, I'm sorry.
B. 
C. 
D. 
E.