根据对话内容，在空白处写出恰当的句子，使对话意思连贯完整。所写句子应与所给的标点符号一致。

A: ?

B: I need a pair of black shoes for a basketball game.

A: OK. ?

B: Size 39.

A: How about this pair?

B: I love it. ?

A: They are made in china.

B: Cool! How much are they?

A: They're on sale for twenty-two dollars.

B: Fantastic! .

A: Here you are.

B: Thank you!

A: .