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It is estimated that about three billion people use the Internet around the world. Most people use the Internet to (1) **get information** or for entertainment. A new study, however, shows us that almost ten per cent of Internet users are using it so often that it is seriously harming their lives. The study (2) **says** that these people may find it difficult to stop using the Internet because they have become addicted. Someone who is addicted finds it extremely (4) **difficult** to stop doing (3) **that activity**. According to a psychologist in (5) **the field**, thirty per cent of Internet users claim that they use the Internet to escape from their problems. The study also shows that having a chat, or discussion, with strangers on the Internet is one of the most (6) **addictive** activities.