Theearthisourhome.Wemusttakecareofit.Lifetodayiseasierthanitwas(1)___yearsago,butithasbroughtsomenewproblems.Oneofthebiggestproblemsispollution.Wecanseeit,smellit,drinkitandevenhearit.Manhasp
Theearthisourhome.Wemusttakecareofit.Lifetodayiseasierthanitwas(1)___yearsago,butithasbroughtsomenewproblems.Oneofthebiggestproblemsispollution.Wecanseeit,smellit,drinkitandevenhearit.
Manhaspollutedthe(2)___.Themorepeople,themorepollution.Manyyearsago,theproblemwasnotsoseriousbecausetherewerenotso(3)___people.Whenthelandwasuseduportheriverwasnotcleaninaplace,manwentto(4)___place.Nowmanisslowlypollutingthewholeworld.
(5)___pollutionisstillthemostserious,it'sbadfor(6)___thingsintheworld.Manycountriesdon'tletpeopleburn(7)___forairinthehousesandfactoriesinthecity.PollutionbySO2isnowthemostdangerouskindofairpollution.It'scausedbyheavytraffic.Peoplesayit's(8)___toridebikes.Whenyouareriding,thereisnopollution.Butevenindevelopedcountries,mostpeopledon'tgotoworkbybike.It'snotbecausebikesareexpensiveorpeoplearetirediftheyridetowork.It'sbecausethenumberofcarsontheroadsbecomeslarger.Somorepeople(9)___theirbikesandgotoworkbycar,thenthingsaregettingworseandworse.Weshouldhavespecialroadsonlyforbikesandmakeit(10)___difficultandexpensivefordriverstotaketheircarsintothecitythattheywillgobacktousingtheirbikes.
1.A.hundredB.hundreds ofC.hundred ofD.hundreds2.A.moonB.starC.earthD.sun3.A.lotB.littleC.manyD.much4.A.othersB.the othersC.the otherD.another5.A.AirB.FoodC.WaterD.Noise6.A.lifeB.liveC.livingD.lives7.A.something badB.bad somethingC.something goodD.good something8.A.leastB.bestC.mostD.worst9.A.put onB.look atC.put awayD.look up10.A.suiteB.suchC