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-Hi, Marta. How are u? U look so unhappy\devastated\blue\depressed\upset\mournful(сами выбирайте). Are u alright?\ Are u ok? Marta... Ответы на вопросы: I suppose that teenagers nowadays use internet very often. Firstly, they are very communicative and internet gives lots of opportunities in order to speak with a person, even if this person is in another country. There are lots of social networks or groups like vk, facebook, twitter and others. Secondly, teenagers want to be uptodate. They want to learn more about celebreties, singers, they want to find out which book or film is very popular and  worth reading. Thirdly, internet helps a lot while a teenager is doing his homework. A teen can find a great deal of information, different kinds of materials about subject which is interesting for a teenager. However, young person can face up to contents which is for over 18`s only and this information might do harm for him.