高分求一篇英语作文。（关于大学生用手机的利弊）有资料的帮忙发下。

In 1999, only 3 percent of the students had cell phones while in 2001 the rate rose to 18 percent. In 2003, however, the rate soared to 56 percent.And now,today there are more than 70 percent students who from the college.
Several factors have attribute to this significant change. The most important is the development of the cell phone industry which has made the cell phone cheap, and the telecommunication industry which provides the users with a better service. Many years ago, for example, it took about several thousand, or even more than ten thousand yuan to buy a cett phone. Now, however, a cett phone of excellent quality costs onty about one thousand yuan. The next important reason is that many students now hold a part time job, which enables them to have more pocket money. They can spend this money on anything they like.
Although cett phones bring college students a tot of benefits, they have atso caused some problems. Some students, for instance, do not turn