2021年度大学英语四级阅读理解试题及答案

大学英语四级阅读理解试题及答案（四）

PassageFour

Questions26to30arebasedonthefollowingpassage.

OnThursdayafternoonMrs.Clarke,dressedforgoingout,tookherhandbagwithhermoneyand

herkeyinit,pulledthedoorbehindhertolockitandwenttotheover60sClub.Shealwayswent

thereonThursdays.Itwasaniceoutingforanoldwomanwholivedalone.

Atsixo'clockshecamehome,letherselfinandatoncesmeltcigarettesmoke.Cigarettesmokein

herhouse?How?How?Hadsomeonegotin?Shecheckedthebackdoorandthewindows.Allwere

lockedorfastened,asusual.Therewasnosignofforcedentry.Overacupofteashewondered

whethersomeonemighthaveakeythatfittedherfrontdoor-Mamasterkey"perhaps.Soshestayed

athomethefollowingThursday.Nothinghappened.Wasanyonewatchinghermovements?Onthe

Thursdayafterthatshewentoutatherusualtime,dressedasusual,butshedidn'tgototheclub.

Insteadshetookashortcuthomeagain,lettingherselfinthroughhergardenandthebackdoor.

Shesettleddowntowait.

Itwasjustafterfouro'clockwhenthefrontdoorbellrang.Mrs.Clarkewasmakingacupofteaat

thetime.Thebellrangagain,andthensheheardherletter-boxbeingpushedopen.Withthekettle

ofboilingwaterinherhand,shemovedquietlytowardsthefrontdoor.Alongpieceofwire

appearedthroughtheletter-box,andthenahand.Thewireturnedandcaughtaroundtheknobon

thedoor-lock.Mrs.Clarkeraisedthekettleandpouredthewateroverthehand.Therewasashout

outside,andtheskinseemedtodropoffthefingerslikeaglove.Thewirefelltothefloor,the

handwaspulledback,andMrs.Clarkeheardthesoundofrunningfeet.

26.Mrs.ClarkelookedforwardtoThursdaybecause.

A.sheworkedataclubontheday

B.shesaidvisitorsonThursdays

C.shevisitedaclubonThursday

D.aspecialvisitorcameonThursday

27.Ifsomeonehadmadeaforcedentry,.

A.Mrs.Clarkewouldhavefoundabrokendoororwindow

B.heorshewasstillinthehouse

C.thingswouldhavebeenthrownabout

D.heorshewouldhaveneededamasterkey

28.OnthethirdThursdayMrs.Clarkewentout.

A.becauseshedidn'twanttomisstheclubagain

B.toseeifthethiefwashangingaboutoutside

C.totheclubbutthenchangedhermind

D.inanattempttotrickthethief

29.Thelockonthefrontdoorwasonewhich.

A.neededapieceofwiretoopenit

B.couldheopenedfrominsidewithoutakey

C.couldn'tbeopenedwithoutakey

D.usedaknobinsteadofakey

30.Thewirefelltothefloor.

A.becauseMrs.Clarkerefusedtoopenthedoor

B.whentheman'sglovedroppedoff

C.becauseitwastoohottohold

D.becausethemanjustwantedtogetaway

答案：cadbd

十九

Waterproblemsinthefuturewillbecomenoreintenseandmorecomplex.Our

increasingpopulationwilltremendouslyincreaseurbanwastes,primarilysewage.On

theotherhand,increasingdemandsforwaterwilldeceasesubstantialytheamount

ofwateravailablefordilutingwastes.Rapidlyexpandingindustrieswhichinvolve

moreandmorecomplexchemicalprocesseswillproducelargevolumesofliquidwastes,

andmanyofthesewillcontainchemicalswhicharenoxious.Tofeedourrapidly

expandingpopulation,agriculturewillhavetobeintensified.Thiswillinvolve

ever-increasingquantitiesofagriculturalchemicals,Fromthis，itisapparentthat

drasticstepsmustbetakenimmediatelytodevelopcorrectivemeasuresforthe

pollutionproblem.

Therearetwowaysbywhichthispollutionproblemcanbedwindled.Thefirst

relatestothetreatmentofwastestodecreasetheirpollutionhazard.Thisinvolves

theprocessingofsolidwastes"priorto〃disposalandthetreatmentofliquid

wastes,orefflunets,topermitthereuseofthewaterorminimizepollutionupon

finaldisposal.

Asecondapproachistodevelopaneconomicuseforallorapartofthewastes.

Farmmanureisspreadinfieldsasanutrientororganicsupplement.Effluentsfrom

sewagedisposalplantsareusedinsomeareasbothforirrigationandforthe

nutrientscontained.Efflunetsfromotherprocessingplantsmayalsobeusedasa

supplementalsourceofwater.Manyindustries,suchasmeatandpoultryprocessing

plants,arecurrentlyconvertingformerwasteproductsintomarketablebyproducts.

Otherindustriesarepotentialeonomicusesforwasteproducts.

1.Thepurposeofthispassageis.

a.toalertthereadertothedwindlingwatersupply

b.toexplainindustrialusesofwater

c.toacquaintthereaderwithwaterpollutionproblems

d.todemostratevariousmeasurestosolvethepollutionproblem

2.WhichofthefollowingpointsisNOTINCLUDEDinthepassage?

a.Industrialdevelopmentincudesthesimplificationofcomplexchemical

processes.

b.Dilutingwastesneedscertainamountofwater

c.Demandsforwaterwillgoupalongwiththeexpandingpopulation

d.Intensivecultivationoflandrequiresmoreandmorechemicals

3.Thereadercanconcluedthat.

a.countriesoftheworldwillworktogetheronpolutionproblems

b.byproductsfromwastesleadtoamoreprosperousmarketplace

c.scienceismakinggreatprogressonincreasingwatersupplies

d.someindustriesarenow,akingeconomicuseofwastes

4.Theauthorgivessubstancetothepassagethroughtheuseof,

a.intervi