Great changes have taken place in the way of communication in people's life in recent years. In the past, people kept in touch with each other mainly by writing letters or using pubilc telephones,which was inconvenient and took much time. but now almost everyone has his own mobile phone and people can communicate with each other almost at any place and at any time. What's more , people have easy access to the internet, which enables them to send and receive e-mails whenever they like .hich these changes,people's pace of life has quickened and people's work has been more efficient. it used to take several days to receive a letter , but now it takes only several seconds, even if they are in different countries. In a word, people are having a much easier life.