2. 移动电话得到广泛使用的原因：非常有用的通信工具，举例;流行的产品;价格下降。
3. 但是移动电话也可能成为令人讨厌的东西：举例，考试中。
范文：
Telephone
Nowadays, more and more people are usingmobile phones. In the street, on a bus, in arestaurant, actually in every other public places, youcan hear someone speaking with a mobile phone.Many college students have bought mobile phones,too.
The mobile phone is so popular because of many reasons. First of all, it is a very usefulcommunication tool. When you are out and you need to contact someone urgently, a mobilephone will enable you to do this if there is no telephone box nearby. A beeperis not alwayssufficient for your purposes. Second, it is a fashionable product which many youths want tohave. Mobile phone manufacturers have used famous stars as their propagandists. At last, theprices of mobile phones are dropping as a result of the scientific development. Ordinary peoplecan afford a mobile phone now. The mobile phone is getting more and more accepted by thecommon public.
However, the mobile phone can also become a nuisance sometimes. In a classroom wheneverybody is taking an important exam, the ring of a mobile phone causes almost some kind ofsound pollution. Those who have mobile phones should avoid disturbing others in publicplaces.
