初中英语完形填空!Theearthisourhome.Wemusttakecareofit请选出正确答案并解释为什么!

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.hundrB.hundredsofC.hundredofD.hundreds

（）2.A.moonB.starC.earthD.sun

（）3.A.lotB.littleC.manyD.much

（）4.A.othersB.theothersC.theotherD.another

（）5.A.AirB.FoodC.WaterD.Noise

（）6.A.lifeB.liveC.livingD.lives

（）7.A.somethingbadB.badsomethingC.somethinggoodD.goodsomething

（）8.A.leastB.bestC.mostD.worst

（）9.A.putonB.lookatC.putawayD.lookup

（）10A.suiteB.suchC.veryD.so