补全对话（每空1分，共5分）。
从题后方框中选出能填入空白处的最佳选项。
A: Good morning.   .
B: Thank you. I’m looking for a hat.
A: 
B: Blue.
A: What about this one?
B: No,     Can you show me another one?
A: What about this one?
B: The colour is very nice. How much is it?
A: Fifty yuan.
B: Oh,    Do you have a cheaper one?
A: Yes, this one is thirty yuan.
B: OK. I want to buy it. Thank you.
A:    .

A.You are welcome. B.Can I help you? C.It’s too expensive. D.What colour would you like? E.I don’t like the colour.