individuals，only without their names, and sells the profiles to companies seeking customers."可知A错误。根据第五段"spying on Internet users is one of the fastest­growing businesses on the World Wide Web."可知B错误。根据倒数第二段"some of the biggest websites in the US don't know that they were installing intrusive files on visitors'computers."可知C错误。根据第二段可知D正确。]

3．It can be inferred that________.

　　A．because the data is used harmlessly，Internet users

around the world will not face threats

B．when a person surfs the Internet，his personal details may be let out without his knowledge

　　C．your computer can really read your mind

答案　B　[推理判断题。根据文章第一段以及下文可知，当一个人上网时，他的信息有可能在自己不知道的情况下被别人所泄露或出售。]

4．According to the passage，"beacon"________．

　　A．is a tiny text file put on your PC by websites

　　B．is a software that can package that data into profiles about individuals

C．can assess the Internet user's location，income，shopping interests and even medical conditions

　　D．is not more complex than the "cookie"

答案　C　[细节理解题。根据第六段"beacons instantly assess the Internet user's location, income, shopping interests and even medical conditions."可知选C。根据第六段"The"cookie"-a tiny text file put on your PC by websites"可知A错误。根据第四段"Lotame packages that data into profiles(个人资料)about individuals"可知B错误。根据第六段"there are new and more complex tools such as"beacons"可知D错误。]

5．What's the writer's attitude to this problem?

　　A．Neutral.　　　　　　 B．Worried.

　　C．Optimistic. D．Indifferent.

答案　B　[观点态度题。根据文章倒数第三段"Millions of Internet users around the world also face unprecedented threats.Private，sensitive，personal and business information is being