Now a days ,Social networking sites has gained a very important role in our life.Social networking sites includes facebook,twitter,wahtsapp ,myspace and many more.when we see it from a positive side ,these  sites have many advantages.Its helps us to connect to our friends,relatives world over.We get current news , even we can chat with our friends. But if we see it from a negative sides it has more disadvantages than its advantages.Firstly it had bad impact on our social life.As we see most of peole specially teenagers spend a lot of timing in accesing such sites.Sometimes we get traped  and cheated by fake identities.So, these sites should be used only for limited time and in useful manner. 
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500 words
Mark the stress in the following words: special specialist , lonely, loneliness flexible