Whatdoyouthinkarethemostimportantinventionsofthepast2,000years?TheTV?Theprinting?Thetelephone?Orthecomputer?Areportshowsthatthesearenottheonlyimportantinventions.Herearefourotherimportantones.
Paperisoneofthemostimportantinventions.Youcan’thaveprintingwithoutpaper.In105AD,CaiLuninventedpaperinChina.LongbeforetheprintingandInternet,CaiLun’sinventionallowedustowritedowninformation,storiesandhistory.
Oneofthesimplest(最简单)inventionstosavelifeisthetoilet.Beforetoilets,wasteranintotheriversfrompeople’shouses.Illnesseswerecommon(普通的)inbigcities,anditwasoftendifficulttofindcleandrinkingwater.
Animalfoodisanotherinvention.Beforetheinvention,mostanimalswerekilledeveryautumnbecausetherewasnotenoughfoodfortheminthewinter.Afterhay(干草)becameakindofcommonanimalfood,animalscouldlivethroughthelongwinter.
Readingglassesisthefourthinvention.Peoplestartgettingfar-sighted(远视)fromtheageof45.Glassesmeanthatanyonecanread,writeanddo“closework”afterthatage.Withoutglasses,theworldwouldbedifficultforthepeopleabove45.
小题1:CaiLun’sinventionofpapermakesitpossibleto______.