阅读理解。
Theworlditselfisbecomingmuchsmallerbyusingmoderntrafficandmoderncommunicationmeans.
Lifetodayismucheasierthanitwashundredsofyearsagobutithasbroughtnewproblems.Oneofthe
biggestproblemsispollution.Topollutemeanstomakethingsdirty.Pollutioncomesinmanyways.We
seeitsmellitdrinkitandevenhearit.
Manhasbeenpollutingtheearth.Themorepeoplethemorepollution.Manyyearsagotheproblem
wasnotsoseriousbecausetherewerenotsomanypeople.Whenthelandwasuseduportheriverwas
dirtyinoneplacemanmovedtoanotherplace.Butthisisnolongertrue.
Manisnowslowlypollutingthewholeworld.
Airpollutionisstillthemostserious.It'sbadforalllivingthingsintheworldbutitisnottheonlyone
kindofpollution.Waterpollutionkillsourfishandpollutesourdrinkingwater.Noisepollutionmakesus
angrymoreeasily.
Manycountriesaremakingrulestofightpollution.Theystoppeoplefromburningcoalinhousesand
factoriesinthecityandfromputtingdirtysmokeintotheair.PollutionbySO2isnowthemostdangerous
kindofairpollution.Itiscausedbyheavytraffic.Wearesurethatiftherearefewerpeopledrivingthere
willbelessairpollution.
Theearthisourhome.Wemusttakecareofit.Thatmeanskeepingthelandwaterandairclean.And
wemusttakecareoftheriseinpollutionatthesametime.
1._____ourworldisbecomingmuchsmaller.
A.Becauseoftheriseinpollution
B.Thankstosciencedevelopment
C.Becausetheearthisbeingpolluteddayandnight
D.Becausetheearthisblownawaybythewindeveryyear
2.Hundredsofyearsagolifewas_____itistoday.
A.mucheasierthan
B.aseasyas
C.muchharderthan
D.ashardas
3.Pollutioncomesinmanyways.Wecanevenhearit.Here"it"means_____.
A.rubbish(垃圾)
B.noisepollution
C.airpollution
D.waterpollution
4.Airpollutionisthemostseriouskindofpollutionbecause_____.
A.itmakesmuchnoise
B.itmakesusangr
