A、To buy a sweater. B、To hold a birthday party. C、To exchange a sweater. D、To meet her boss. C

W1: Yes, ma’am. Can I help you?
W2: Yes, I’d like to exchange this sweater.
W1: What seems to be the matter?
W2: Well, you see, I got this as a birthday present, but it’s the wrong size.
W1: Do you have the receipt?
W2: Yes.
W1: Could I see it, please?
W2: Well, here you are.
W1: What size do you want?
W2: Just one size larger.
6．What does the buyer want to do?
7.What does the saleswoman see?