从方框中选择恰当的句子，将对话补充完整。
A. Do you want it for your teacher?
B. How much is it?
C. Can I help you?
D. What is her favourite colour?
E. Can I look at that green one?
F. What about this one?
A: Good morning. ____
B: Yes, I'd like a birthday card.
A:____
B: No, I'd like one for my mother.
As What a good daughter! ____
B: It looks nice. But my mother doesn't like red.
A:____
B: She likes blue and green.____
A: Of course. Here you are.
B: It's nice. It's my mother's favourite. ____
A: Two yuan, please.
