根据情景选择句子补全对话（有两项是多余的）
A: ____
B: Yes, please. I want a skirt for my daughter.
A:____
B: Green or blue.
A: Look at the skirts over there. We have different colors. Which would you like?
B: I think the green one is nice.____
A: It's 150 yuan.
B: Oh, it's too expensive.
A:____ It's only 60 yuan.
B: It's cheap, but it is big.____
A: Yes. Here you are.
，则tanα＝