选择正确的句子，补全对话。

A. Can I help you? B. How much is it? C. What time is it? D. Can I try it on? E. It's just right.

Mum: Amy, hurry up.

Amy:

Mum: It's 9:00. Let's go shopping.

Saleswoman:

Amy: yes, this dress is pretty.

Salesman: Of course. Here you are.

Mum: Is it OK?

Amy: Yes.

Mum:

Saleswoman: It's 60 yuan.

Mum: OK. I'll take it.