【这道题怎么做：阅读理解.阅读理解.Hundredsofyearsago,lifewasmuchharderthanitistoday.Peopledidn'thavemodernmachines.Therewasnomodernmedicine,either.Lifetodayhasbroughtnewproblems.Oneoftheb】

　　这道题怎么做：阅读理解.

　　阅读理解. Hundredsofyearsago,lifewasmuchharderthanitistoday.Peopledidn'thavemodernmachines.

　　Therewasnomodernmedicine,either.

　　Lifetodayhasbroughtnewproblems.Oneofthebiggestispollution.Waterpollutionhasmadeour

　　riversandlakesdirty.Itkillsourfishandpollutesourdrinkingwater.Noisepollutionmakesustalk

　　louderandbecomeangrymoreeasily.Airpollutionisthemostseriouskindofpollution.It'sbadtoall

　　livingthingsintheworld.

　　Cars,planesandfactoriesallpolluteouraireveryday.Sometimesthepollutedairissothickthatitis

　　likeaquiltoveracity.Thiskindofquiltiscalledsmog(烟雾).

　　Manycountriesaremakingrulestofightpollution.Factoriesmustnowcleantheirwaterbeforeitis

　　thrownaway,andtheymustn'tblowdirtysmokeintotheair.

　　Weneedtodomanyotherthings.Wecanputwastethingsinthedustbinanddonotthrowitonthe

　　ground.Wecantogoworkbybusorwithourfriendsinthesamecar.Iftherearefewerpeopledriving,

　　therewillbelesspollution.

　　Rulesarenotenough.Everypersonmusthelptofightpollution.

　　1.Hundredsofyearsago,lifewasmuchharderthanitistodaybecause______.

　　A.therewerenotanymodernmachines

　　B.therewasnomodernmedicine

　　C.bothAandB

　　D.therewerenotmanypeople

　　2.Whatisthebiggestproblemintoday'slife?

　　A.Waterpollution

　　B.Airpollution

　　C.Noise

　　D.Pollution

　　3.Themostseriouskindofpollutionis______.

　　A.noisepollution

　　B.airpollution

　　C.waterpollution

　　D.A,BandC

　　4.Factoriesmustcleantheirwater______.

　　A.beforetheyarethrownaway

　　B.whentheyarethrownaway

　　C.afteritisthrownaway

　　D.beforeitisthrownaway

　　5.Fromthepassageweknowthat______.

　　A.afewyearsago,therewasnosmogatall

　　B.todaypeopledon'thavetotalktoeachotherinaloudvoice

　　C.wecandrinkwaterfromthepollutedriversandlakes

　　D.peoplearemakingrulesinordertofightpollution