近年来我国经济社会快速发展，从下图中可以看出（ ）
Mum：Mary. ____
Mary：It's very pretty.
Assistant: ____
Mum：Yes. ____
Assistant：It's $ 99.
Mum：Oh， that's expensive.
Assistant：Do you like that blue skirt？
Mary：Yes. ____
Mum：OK. How much is it？
Assistant：It's $ 50.
Mum： ____
A. Can I help you?
B. OK. I'll take it.
C. How do you like this dress?
D. I like blue.
E. How much is it?
