阅读对话，补全空缺，把选项写在横线上。

Assistant(营业员)=A      Mary=M

A: Can I help you?

M: Yes. The shoes are nice.

A:

M: Blue.

A: OK.

M: They are nice, but too small.

A: Hmm.

M: OK. They're just right!

A: Forty-five yuan.

M: Well,

A. Try size 6, please.

B. Here you are.

C. I'll take them.

D. What color do you like?

E. How much are they?