Why are mobiles so popular? Because people love to talk to each other. And it is easier with a mobile phone. In countries like Russia and China, people use the mobile phone in places where there is no ordinary telephone. Business people use mobiles when they"re traveling. In some countries, like Japan, many people use their mobile phones to send e-mail message and access the Internet. They use a new kind of mobile phone called "i-mode". You can even use a mobile phone to listen to music. Mobile phones are very fashionable with teenagers. Parents buy mobile phones for their children. They can call home if they are in trouble and need help. So they feel safer. But teenagers mostly use them to keep in touch with their friends or play simple computer games. It"s cool to be the owner of a small expensive mobile. Research shows that teenage owners of mobile phones smoke less. Parents and schools are happy that teenagers are safer and smoke less. But many people dislike them. They hate it when the businessman opposite them on the train has a loud conversation on his phone. Or when the mobile phone rings in a cafe or restaurant. But there is a much more serious problem. It"s possible that the mobile phone can heat up the brain because we hold the phone so close to our head. Scientists fear that mobiles can perhaps be bad for your memory and even give you cancer.

单选题 Mobiles are popular among people because ______.

单选题 It is stated in the passage that in Russia and China ______.

【正确答案】 C

【答案解析】解析：本题的题干中有地名Russia和China，是明显的信号词。只需在文章中找到这两个词出现的句子，就能够找到本题的依据句。where there is no…的意思是without。其他选择项的内容过于绝对。例如，A项选择中的everywhere就是绝对词，没有留有余地；D项选择的people一词前面没有加上some这一量词，所以也是太绝对了。因此A和D是错误答案。

单选题 Parents buy mobile phones for their children because ______.

【正确答案】 B

【答案解析】解析：本题的依据句是第2段第2—4句话：Parents buy mobile phones for their children. They can call home if they are in trouble and need help．So they feel safer．可以以本题题干中的信号词parents作为目标，就能很容易地找到依据句。其他选择项的内容与题干内容没有必然的因果关系，从常识来判断就属于没有道理的说法，所以是错误答案。

单选题 Why can mobile phone be a much more serious problem?

A、 Because people hate the businessmen using mobiles in public places.
B、 Because the use of mobile phones can be physically harmful.
C、 Because there is strong evidence for the problems of mobiles.
D、 Because people feel their privacy unprotected in a café or restaurant.

【正确答案】 B

【答案解析】解析：本句话的关键是正确理解题干中的主要信息：a much more serious problem。本题的依据句是：But there is a much more serious problem．It"s possible that mobile phone can heat up the brain because we hold the phone so close to our head．从一般的常识也可以判断出，手机的主要问题是手机的辐射，所以B项选择是最有道理的说法。

单选题 Which of the following can be the title of this passage?

【正确答案】 A

【答案解析】解析：本题的关键是判断出本题的题型是大意题。应该知道大意题的依据句是文章的主题句，其位置一般位于文章的第一句话或最后一句话。本题的依据句就是文章的第一个句子，与正确选择项用词完全一致。其他选择项属于无关信息或细节信息。