在公园预见陌生人:A: Where shall we go now, Lily?B: I want to see go to zoo to see monkey. Lets go now?A: OK.C: Excuse me, could you please do me a favor?A: Yes, with pleasure. What can i do for you?C: I lost my bag in the park. I don't know what to do now.B: Oh, sorry to hear that. Here, the policeman is there and maybe he can help you.D:Hello, can i help you?C: I lost my bag in the park. Can you help me?D: Yes. I have one bag. Is it yours?C: Yes. Thank you very much.A: Please take care of your bag in the future.B: Nice to see you. We have to go to the zoo now. Bye.C: Bye.