补全对话。 A: 1._____can I do for you? B: I 2._____ a bag of sports. A: We have bags 3._____ all colors. They are on 4._____ now. B: Oh, that's great. A: 5._____ 6._____ do you want? B: Green. A: Let 7._____ have a look. What 8._____ this one? B: It's too big. Do you have a 9._____ one? A: Yes. How about this green one? B: It is very nice. I'll 10._____ it. 11._____ 12._____ is it? A: Twenty dollars. B: 13._____ is the money. A: Thank you. B: You're 14._____.