2．Someone says，"Time is money，"but I think time is even（76）more important（important）than money．Why？Because when money is spent，we can get it back．However，when time is（77）gone（go），it will never（78）return/come back/be back（回来）．That's why we mustn't waste time．It goes without（79）saying（say） that the time is usually limited（有限的）．Even a second is very important．We should make full use of our time to do something（80）useful（有用的）．But it is a pity that there are a lot of people who（81）don't know（not know） the importance of time．They spent their limited time smoking，drinking and（82）playing（play）．They can't understand that wasting time means wasting part of their own（83）lives（生命）．In a word，we should save time．We shouldn't（84）leave （留下） today's work for tomorrow．Remember we have no time（85）to lose（lose）．
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