3、toteachstudentssomegoodwaystousetheInternet.Itgivesusefuladvice. Some studentsalsomake____9____ontheInternet.Butifyouwanttohaveaface-to-face____10_____(meet)withyouronlinefriends,letyourparentsknowandmeetinaproperplace. (2) Rivers areoneofourmostimportantna
4、turalresources.Manyoftheworld’sgreat_____1____arelocatedonrivers,andalmost____2_____countryhasatleastoneriverflowingthroughitthatplays_____3_____importantpartinthelivesofitspeople. Since thebeginningofhistory,people_____4_____(use)riversfortransportation.Thelongestoneintheisthe,andthelifelin
5、eofisthe._____5_____transportation,riversgivewatertodrink,waterforcrops,andchancesforfunandrecreationforthepeople_____6___livealongtheirbanks. However, largecitiesandindustriesthatarelocatedonriversoftenmakeproblems.Asthecitiesgrow____7_____sizeandindustriesincreaseinnumber,thewaterintherive
6、rsbecomes_____8_____(pollute)withchemicalsandothermaterials.Peoplearelearningthe_____9_____(important)ofdoingmoretokeeptheirriversclean____10______theywanttoenjoythebenefitsofthisnaturalresource. (3) Liu XiangwasthefirstAsian______1_____(win)themen’s110mhurd