选择合适的选项补全对话。
A．much
B．Can
C．cheap
D．at
E. expensive
A：Good evening.1. I help you?
B：Yes，I want a dress，please.
A：Please look 2. this one. It's very pretty.
B：But it's too 3.．It's 350 yuan.
A：How about this one? It's ．
B：But I don't like the colour. It's too colourful.
A：Do you like that yellow one?
B：It is nice. How is it?
A：It's 100 yuan.
B：OK. I'll take it. Here is the money.
A：Thank you. Anything else?
B：No，thanks. Goodbye!