选择相应的句子补全对话。
A:
1．B: Yes, please. I want to buy a cap.
A: I’ll show you. This way, please. Here they are.
B: Thanks.
A:
2．B: Black.
A: How about this one?
B: Cool! I like it.
3．A: 80 yuan.
B: Okay.
4．| A．What colour do you like? |
| B．May I help you? |
| C．How much is it? |
| D．I’ll take it. |
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