3．Many students like to work on the Internet．Of （81）course it can bring us many good things．We can learn more knowledge （82）outside our books，practice our spoken English with someone（83）elseand look up some useful information． At the same time，it can bring us some bad things．Some students have （84）made too many friends，seen some bad information that is no good for us and spent too much time on it．Some students even waste lot of time playing （85）games on the Internet．We should know what we can do and what we cannot do．
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