专业四级是针对英语专业同学的重要考试，其真题的参考价值无可比拟，希望同学们能够吃透真题，通过专四。
Hints：
stereo
scratch
Yes, can I help you? Yes, you see I bought this personal stereo at your shop three days ago. And I'm afraid that it hasn't really matched up to what I was told about it. I see. What exactly is the matter? Well, first of all, there's this large scratch across the front of it. But you should have noticed that when you bought it. But it was in the box and all sealed up. Well, I am sorry, but it really is your responsibility to check the goods when you buy them. How were we to know that it wasn't you who made the scratch? That's ridiculous. But, anyway, it's not the most important thing. I really am not happy about this the other thing. And what is that? Look, it says here that the noise from it should be undetectable by other people. Yes, that's right. But people can hear it and it's really embarrassing on the bus and the underground. Well, I am sorry. But it must be the way you are wearing the headphones. Look, I know how to put earphones in my ears. Thank you very much. But what I want to know is what you are going to do about it all. Well, I suppose we could exchange it for another model if you really aren't happy with it. No, I certainly am not. Well, if I just could have the receipt. Yes, well there is a slight problem about this receipt.