As can be seen from the chart , great changes have been taking place in the ownership of mobile phones in China .At the end of 2002 , there were 20 million mobile phones . By year 2005 , the number will reach up to 30 million .
People have found mobile phones very convenient . They can get in touch with each other whenever and wherever they like . There are many different functions for different needs , such as sending short messages and surfing the internet . However it may also bring us some trouble . For example , you will have to pay for a wrong number and the radiation from the phone may do harm to our health. In spite of this , the number of people having mobile phones is still increasing steadily .
参考词汇：食堂canteen 给某人增加经济负担add financial burden to
sb
Dear
friends,
May I
have your attention, please? Now I’d like to make a speech here。 Nowadays, some of us students
have formed some bad habits in our school。 For example,
1．一位父亲在找儿子