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  3. Cell Phones: Hang Up or Keep Talking? Millions of people are using cell phones today. In many countries, cell phones are ver

Cell Phones: Hang Up or Keep Talking? Millions of people are using cell phones today. In many countries, cell phones are ver

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问题                     Cell Phones: Hang Up or Keep Talking?
    Millions of people are using cell phones today. In many countries, cell phones are very【B1】______with young people. They find that the phones are more than a means of communication, 【B2】______a mobile phone shows that they are cool and connected.
    The explosions around the world in mobile phone use make some health professionals【B3】______Some doctors are concerned that in the future many people may【B4】______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【B5】______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【B6】______with modern scanning(扫描)equipment.
    What makes mobile phones potentially【B7】______? The answer is radiation. High-tech machines can detect very small amounts of【B8】______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【B9】______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【B10】______your mobile phone too often.

【B6】
选项
答案L
解析 通过分析此句发现此处旨在考查情态动词与被动语态的用法，can be后面需要接动词的过去分词，备选单词中只有detected一个过去分词，detect原意是“检测，发现”，此句意思是“大脑和头部组织的变化迹象可以用现代扫描检测设备检测出来”，因此此处应选L。
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