听力材料：

　　Hi, my name is Bill. I was talking your professor in the subway about the greatest phone service I used. And it turned out we both interested in marketing, so he asked me to talk to the marketing class. You see I am a buzzer, part time you know. During the day, I am a student just like you. Now I had read that piece of tacking buzzing, it is really misleading. How it described buzzing leads out a lot and gives the wrong impression

　　大家好，我是比尔。我刚才在地铁上跟你们教授谈论我用过的最好的电话服务，然后他让我来市场营销课堂上讲一讲。大家知道我是一个兼职托儿。在白天我跟你们一样是个学生。我看到了这个关于口碑营销的偏见的文章，这是一种误导。里面对于口碑营销的描述是错误的。

　　First, it makes a sound that buzzing do not tell the truth about the products they are buzzing. That is not true. How buzzing work is this：companies find people who use the product and who really think the product is good. So, buzzing is not like ordinary advertisement when an actress is paid to read some lines. Yes, I get pay for telling what I think, but you get the truth from buzzers. I really do think my phone service is great. That is why the company hired me.