【正确答案】
With the development of the information technology, the cell phone has become a necessity for most people. Obviously, it shortens the distance between people and makes our life more convenient. With its help, it is becoming much easier for people to contact each other almost anywhere and anytime.
However, cell phones sometimes may be very annoying to others. Some people use the cell phone and shout loudly in public as if there were no others present. Moreover, we may frequently hear the ringing of the cell phones on formal occasions, even at a meeting, in class, and in a hospital ward.
Therefore, we should always bear it in mind that cell phones may disturb others while they bring oneself conveniences. So it is necessary for one to turn off his cell phone on those occasions when quietness and peace are required, for it conveys one's respect for others, and for oneself.