补全对话

A．May I try it on?

B．OK．I'll take it．

C．How much is it?

D．Yes, I'd like to have a hat．

E．Size L．

A：What can I do for you?

B：　　1　　

A：What size do you wear?

B：　　2　　

A：Here you are．

B：Oh, a red one．I don't like red．Have you got any blue ones?

A：I'm sorry we haven't got any at the moment．What about a white one?

B：That's all right．　　3　　

A：Certainly．

B：　　4　　

A：200 yuan, please．

B：　　5