单选题
Cell Phones: Hang Up or Keep Talking?

Millions of people are using cell phones today. In many places it is actually considered unusual not to use one. In many countries, cell phones are very popular with young people. They find that the phones are more than a means of communication--having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England. there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.
On the other hand, why do some medical studies show changes in the brain cells of some people who use mobile phones? Signs of change in the tissues of the brain and head can be detected with modern scanning(扫描) equipment. In one case, a traveling salesman had to retire at a young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.
As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

单选题 People buy cell phones for the following reasons EXCEPT that
【正确答案】 B
【答案解析】[解析] 题意:人们因下列原因而买手机,除哪一项之外?
题干中的关键词为“buy cell phones买手机;EXCEPT除…之外”。
第1段的第2行可找到A项;在最后1段的第3行可找到C项和D项。以此判断B项正确。
单选题 The word "detected" in paragraph 3 could be best replaced by
【正确答案】 C
【答案解析】[解析] 题意:第3段中的“detected”一词可由下列哪一项得到最好的替换。
题干中的关键词为“could be best replaced by由…得到最好的替换”。
“detected”词意为“发现”。以下4选项含意分别为:A选项cured治疗;B项removed移掉;C选项discovered发现;D选项caused引起。很明显C选项正确。
单选题 The salesman retired young because
【正确答案】 C
【答案解析】[解析] 题意:年轻的推销员离职了,因为______。
题干中的关键词为“The salesman retired推销员离职了;because因为”。
根据文中第3段的第4行:“一个很年轻的流动推销员因严重地失记而不得不离职。”以此判断C项正确。
单选题 On the safety issue of mobile phones, the manufacturing companies
【正确答案】 D
【答案解析】[解析] 题意:有关手机的安全问题,制造公司______。
题干中的关键词为“On the safety issue有关安全问题;the manufacturing companies制造公司”。根据文中第4段的最后1句:“手机公司认为确实有些辐射,但他们说辐射量很小无需担忧”。以此判断D项正确。
单选题 The writer's purpose of writing this article is to advise people
【正确答案】 C
【答案解析】[解析] 题意:作者写本文的目的是建议人们______。
题干中的关键词为“The writer's purpose作者的目的;to advise people建议人们”。
根据文中最后1段的第1句:“随着有关安全问题讨论的继续,似乎最好少用手机。”最后1句:“因此,最聪明的做法是少用手机。”以此判断C项正确。