People use the Internet for many purposes: education, communication, entertainment and commerce. However, the Internet has limitations. It is not only time - consuming and costly but also dangerous because of viruses and bad programs. Moreover, Internet users sometimes have to suffer various risks such as spam or electronic junk mail, and personal information leaking. So, while enjoying surfing, be alert! 76. What do People use the Internet for? ....................................................................................................................................... 77. The Internet has also disadvantages, doesn't it ? ....................................................................................................................................... 78. Is using the Internet time-consuming and costly? ....................................................................................................................................... 79. Why is Internet dangerous? ....................................................................................................................................... 80. What do Internet users sometimes have to suffer? .......................................................................................................................................