根据对话内容，从所给的七个选项中选出可以填入空白处的最佳选项，使对话内容完整。（有两项为多余选项）

Shop worker: What can I do for you?

Betty:    

Shop worker: What colour do you like?

Betty: Purple.

Shop worker: All right.    

Betty: Small.

Shop worker: What about this one?

Betty:    

Shop worker: Certainly.

Betty: Oh, I like it.    

Shop worker: It's 198 yuan.

Betty:     

Shop worker: But wait a minute! There is a sale on today. Everything is half price.

Betty: OK! I'll take it.

A. That's too expensive. B. May I try it on? C. I'd like to buy a T-shirt. D. I'm afraid I don't like it. E. How much is it? F. What else would you like? G. What size do you take?