Decades ago, no one thought that using computers could become compulsive behaviour that could affect the social and physical life of computer users. This obsessional behaviour has affected teenagers and college students. They are likely to log on computers and spend long hours at different websites.

　　They become hooked on computers and gradually their social and school life is affected by this situation. They spend all free time surfing and don't concentrate on homework, so this addiction influences their grades and success at school. Because they can find everything on the websites, they hang out there. Moreover, this addiction to websites influences their social life.

　　They spend more time in front of computers than with their friends. The relation with their friends changes. The virtual life becomes more important than their real life. They have a new language that they speak in the chatrooms and it muses cultural changes in society.

　　Because of the change in their behaviour，they begin to isolate themselves from the society and live with their virtual friends. They share their emotions and feelings with friends who they have never met in their life. Although they feel confident on the computer, they are not confident with real live friends they have known all their life. It is a problem for the future. This addictive behavior is beginning to affect the entire world.

　　5．The underlined word “obsessional” in the second paragraph probably means ________.

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