补全对话

A．May I try it on? B．How much is it? C．Can I help you? D．I'll take it E．What size do you want? F．Black, please.

(In the shoe store)

Shop worker：

Lingling：I'd like a pair of shoes.

Shop worker：What color do you like?

Lingling：

Shop worker：

Lingling：Size 31

Shop worker：How about this pair?

Lingling：

Shop worker：Of course.

Lingling：

Shop worker：Only 30 yuan

Lingling：It' cheap.