A Excuse me,could you do me a favor? 打扰一下，能帮我个忙吗?
B Of couse, what's the matter? 当然，什么事?
A We are busy in preparing for the train.Would you please buy us some fruit? 我们现在忙着为坐火车准备东西，你能帮我们买点水果吗?
B What kind of fruit do you want? 你们想要什么水果?
A Apples and pears,one kilo for each of them,please. 苹果和梨各买一斤。
B Sure,please give me $10 in advance.l wil have them bought for you. 好的，先给我10美元吧，我去给你们买。