补全对话。(30分) A: (1)____ Can I help you? B: Yes. I (2)____ a schoolbag. A: (3)____do you like best? B: I like the blue one. Its colour is (4)____. A: All right.(5)____ It is 15 yuan. B: (6)____ Here is the money. Goodbye. A: Thank you. Goodbye. A Which one B Good morning. C very beautiful D Here you are. E I will take it. F want to buy