听短对话，从题中所给的A、B、C三个选项中选择正确答案。每段对话听两遍。
1. W: Do you want this red sweater?
M: No. It’s big. I want a small one.
2. W: Can I help you?
M: Yes, please. I want the big bag for 15 yuan and the small bag for 10 yuan.
3. W: Can I help you?
M: Yes, please. I want a pair of shoes.
4. M: What can I do for you?
W: I want a pair of black trousers.
5. M: How much is the brown sweater?
W: It’s nineteen dollars.
6. M: What color do you like?
W: I like red, black and brown. But I don’t like blue.