Ithinkthemostusefulinventionintheworldsofarisinternet.Wecansearchforinformationweneedintheinternet,knowingmoreabouttheworld.Itmakeslifemoreconvenient.Wecandomerelyeverythingthroughinternet,includingorderingfoods,buyingbooks,reading,studying,talkingwithfriendsandmakingnewfreinds.Internetalsoenablesustoexpressourselvesfreelybecausethelifeininternetisvirtual,nobodyknowswhoyoureallyare. 　　Inaword,internetisthemostusefulinventionintheworldwithoutwhichhumancannotliveabetterlife. 　　满意还望采纳哟