补全对话，填写对话内容，使其完整、正确，每空词数不限

A: What's the date today, Alice?

B: It's December 28 th . It's my birthday.

A: Oh! !

B: Thanks.

A: I want to buy a gift for you.

B: Yeah! It's very nice of you.

C: ? (At the supermarket)

A: Yes, please. I want to buy a schoolbag for my friend.

C: ?

A: Oh! How about the red one, Alice?

B: It looks nice.

A: OK! ?

C: It's forty dollars.

A: Well, I'll take it. Thank you.

C: .