14．You may open your electronic mail and find information about how to buy medicine，cheap airline tickets，and books and，of course，computers and computer products．There may also be offers for investment deals，bank loans and special holidays．However，to many computer users，this use of electronic spam to sell products has become a major problem as it makes computer communication more difficult．
Many companies who want to send a great deal of advertising might use the services of a"spammer．"A spammer is a person or company that uses computers to send out millions of copies of the same sales information．Spammers find e-mail addresses from websites，news groups and"chat rooms"where people send messages to each other．
Most spam is sent by companies who are trying to get you to buy their products．Some of these are honest companies that offer good products or services for fair prices．These companies can offer their products for a cheaper price than you might find in a store．However，much of the spam on the Internet is sent by criminals who are trying to sell products that do not exist or offer services they will not provide．They are only interested in stealing your money．When you answer their spam，you find you are expected to send them money and receive a gift．If you just follow what they ask you to do without any consideration，it is likely that you will be cheated and lose some money．
28．What does the word"spam"in the last sentence of the first paragraph probably refer to？A
A．Unwanted electronic information
B．serious computer viruses
C．Advertisements sent by dishonest companies
D．Companies sending out the same sales information．
29．Why do some companies send spam？B
A．to make friends on the Internet．
B．to promote their producta on the Internet．
C．to send some virses to your company．
D．to make computer communication much easier
30．According to the writer，how can we deal with spam？A
A．Look out for any spam that reaches your computer．
B．Don't trust any information on the Internet．
C．But the cheaper products advertised in the spam．
D．Don't buy anything advertised in the spams．
31．The auther's main purpose of writing this passage is toC．
A．explain what spam is
B．find out who send out spam
C．warn readers of the possible dangers of spam
D．show the advantages and disadvantages of spam．
分析 全文大意
邮箱里的各类产品推销的邮件使网上交流变得困难．有些邮件推销的产品，品质有保证，价格还合理，还会低于实体店．而大多数的邮件是骗人的．如果你轻易相信的话，很有可能就会上当受骗，损失钱财．
解答 28．A 词义猜测题．根据下文第二段第一句Many companies who want to send a great deal of advertising might use the services of a"spammer．"以及spam所在的句子…has become a major problem as it makes computer communication more difficult．"很多公司使用spammer提供的服务在网上发布广告，使网上交流变得困难"．两者结合起来可知，其含义是向网络用户发送用户不需要的商业广告信息．故选A．
29．B 细节理解题．根据第三段Most spam is sent by companies who are trying to get you to buy their products．可知，公司发送垃圾邮件的目的是为了销售产品．故选B．
30．A 推理判断题．根据第三段If you just follow what they ask you to do without any consideration，it is likely that you will be cheated and lose some money．可知，如果轻易相信垃圾邮件所说，很有可能就会上当受骗．所以一定要小心为妙，多个心眼，谨防上当．故选A．
31．C 写作意图题．根据作者的描述可知，邮箱里的邮件一类是真的推销物美价廉的产品，另一类是骗人钱财的邮件．作者提醒大家慎重对待，谨防上当．故选C．
点评 细节理解题可根据题干中的关键词定位到原文中相关的信息，从而找出答案．譬如29题，可根据题干中的关键词companies send spam定位到第三段第一句，从而找出答案．
