No one is smiling more than Larry Page,27，and Sergey Brin,26，who seem certain to become billionaires when the company goes public，probably sometime next year.They make a great comedy duo.When they first met as Ph.D.students，the pair say，they found each other horrible－“I still find him horrible，” adds Brin—but were driven together by a computer­science project aimed at coming up with better ways of searching the Web.

　　The idea behind Google is that traditional search engines are stupid.They think relevance is based on repetition: if you type in a request for Tiger Woods，say，you'll get websites listed according to how many times those words appear.Not only is this no guarantee of quality，but it's also open to abuse.If you own a Tiger fan site and want to lead more people to it，simply type his name thousands of times in the site's source code.

　　6．The first paragraph serves to________.

　　A．compare two websites

　　B．bring out the topic

　　C．put blame on Yahoo

　　D．give the background of the topic

　　【解析】　第一段告诉我们和雅虎相比，还有更好的搜索引擎(超级速度和准确性)，下文就是介绍的这一更好的搜索引擎：谷歌。由此可以看出，本段的主要作用就是引出下文。

　　【答案】　B

　　7．What does the underlined word “them” in the third paragraph refer to?

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