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选项: What size do you need try this shirt on I will take it on sale I like shopping I am just browsing don’t mention it 对话: A: What can I do for you? B: No, thank you, 1 . A: Ok, if you need any help, please let me know. B: Can I 2 ? A: Of course. 3 ? B: Do you have size M in blue color? A: Yes, here you are. B: Is this shirt 4 ? A: Yes, you can get 40% off. B: Good, 5 !