1.  From the foregoing, no matter which way you choose to maintain your friendships, you should remember that it is not the ways you use that affect your friendships but the attitude you hold that critically influences the quality of your friendships.

2.  It is so widely used that it can help people do almost everything, such as emailing friends, searching for information, shopping and so on.

3.  It's so widely used that it seems that people can't live without it.

4.  With the development of technology and economy, the Internet is so widely used that it plays an unprecedentedly essential and indispensable part in our daily life.

5.  For example, computer technology is so widely used that many people do not even want to use their brain to think about some easy questions.

6.  Some people hold the point that students should work hard in their own field and if they had spare time, they should use it to learn deeper in their own fields not others.