A. How much is it, please? B. Oh yes. We have blue, yellow and white ones. C. Which one would you like, please? D. I"ll take this one. E. Can I help you?
A: Excuse me. May I ask you some questions? B: __________________________________ A: What do you often do on the train? B: __________________________________ A: Where do you put the rubbish? B: __________________________________ A: __________________________________ B: __________________________________ A: __________________________________ B:___________________________________