俗话说“多个朋友多条路”，但是出门在外甚至是在异国他乡，在无法确保自己处处有朋友的时候，就需要用自己的嘴巴来为自己谋便利了。请求人办事无处不在，如何获得比较好的效果?后一组对话中，" I was wondering if I could...”将客气的表达could和I was wondering相结合可使我们的话语更显礼貌。
　　熟人之间 　　A: Hi，can you do me a favor, please? 　　B: Sure. What is it? 　　A:Can you keep an eye on my back-pack, please? My mom is calling me. 　　B:Sure. Will it be very long? I have something to deal with in a few minutes. 　　A:No，not much long. I will not talk long with her. 　　B:Go ahead. It'll be safe with me. 　　A:Thank you very much.
　　A:嗨，麻烦帮我一下，好吗? 　　B:当然。什么事? 　　A:你能帮我看一下包吗?我妈妈给我打电话了。 　　B:当然。要用很长时间吗?几分钟后我有事要去做。 　　A:不，用不了很久。我跟她不会聊很长。 　　B:去吧。你的包很安全。 　　A:感谢你。
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