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UnitSixWhenwasitinvented?I.用所给词的适当形式填空There’san___________(electricity)heaterinthebedroom.Thistoolisoftenusedinour_____________(day)lives.Thegoodnews_________(please)allofus,andwearevery__________(please)withthe__________(please)news.Hewasagreat_________(invent).He_________(invent)manyuseful___________(invent).Doyouknowhowteatradehelpedtospreadthe____________(popular)ofteaandteaplant.Ourresponsibilityistolevelup(提高)thestandard(水平)ofthepeople'smaterialand__________(culture)life.Industryandagriculture(农业)arethetwoimportantsectors(部门)ofthe_______(nation)economy.She___________(accident)erasedthetape.Nowwetakethekidstotheparkorouttodosomethingmorefunand__________(creat).Therearetenpeopleintheroom,__________(include)me.II.用括弧里动词的适当形式填空WheneverImentioned_____________(have)dinnertogether,hesaysheisbusy.Ihavenoreason_________(doubt)him.Shefeltasleepwiththelights_____________(burn).Withoutanything___________(leave)intherefrigerator,shewentouttogetsomethingtoeat.Theteacherencouragesthestudents______________(work)hard____________(achieve)theirdreams.I’msorrytohavekeptyou___________(wait)foralongtime.Manyyoungpeopledreamof___________(become)famousoneday.Thiskindoftoolcanbeusedfor___________(cut)things.Henslayeggs,___________(give)birthtolife,soaneggisasymbolofnewlife.III.单项选择()1.TheOlympics_____________everyfouryears.A.isheldB.holdsC.areheldD.holds()2.Theysoldthevegetables__________ahighpriceinthecoldweather.A.atB.inC.onD.of()3.Manyyoungpeople__________themovieandsportsstarsandwouldliketobecomelikethem.LookupatB.lookuptoC.lookupinD.lookupdown()4.Somepeopledoubt__________theinventorcameupwiththeideahimself.whenB.whetherC.weatherD.that()5.Doyouuse_______________ideatocreatethisgame?SomeoneelseB.someoneelse’sC.someoneelses’D.someone’s()6.Thenumberoftheteachersinourschool___________450now.areB.isC.wereD.was()7.Anumberofengineers______toAfricabyourgovernmenttohelpthepeopletherelastweek.issentB.aresentC.wassentD.weresent()8.YesterdayItookTom’sschoolbaghome_____________.bymistakeB.inmi