(完整版)大学英语四级阅读明白试题及答案(四)

千里之行，始于足下。第2页/共2页精品文档推荐(完整版)大学英语四级阅读明白试题及答案(四)大学英语四级阅读明白试题及答案（四）

十六

Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoingsoand,fortunately,thenumberofsuchreasonsissmall.Pruninginvolvesthecuttingawayofobergrownandunwantedbranches,andtheinexperiencedgardenercanbeencouragedbythethoughtthatmoredamageresultsfromdoingitunnecessarilythanfromleaving

thetreetogrowinitsownway.

First,pruningmaybedonetomakesurethattreeshaveadesiredshapeorsize.Theobjectmaybetogetatreeoftherightheight,andatthesametimetohelpthegrowthofsmallsidebrancheswhichwillthickenitsappearanceorgiveitaspecialshape.Secondly,pruningmaybedonetomakethetreehealthier.Youmaycutdiseaedordeadwood,orbranchesthatarerubbingagainsteachotherandthuscausewounds.Thehealthofatreemaybeencouragedbyremovingbranchesthatareblockingupthecentreandsopreventing

thefreemovementofair.

Oneresultofpruningisthatanopenwoundisleftonthetreeandthisprovidesaneasyentryfordisease,butitisawoundthatwillheal.Oftenthereisaracebetweenthehealingandthedeseaseastowhetherthetreewillliveordie,sothatthereisaperiodwhenthetreeisatrisk.Itshouldbetheaimofeverygardenertoreducewhichhasbeenprunedsmoothandclean,forhealingwillbesloweddownbyroughness.Youshouldallowthecutsurfacetodryforafewhursandthenpaintitwithoneofthesubstancesavailablefromgardenshopsproducedespeciallyforthispurpose.Pruningisusuallywithoutinterferencefromtheleavesandalsoitisveryunlikelythatthecutsyumakewillbleed.Ifthisdoeshappen,itis,ofcourse,impossibletopaintthem

properly.

1.Pruningshouldbedoneto______.

a.makethetreegrowtaller

b.improvetheshapeofthetree

c.getridofthesmallbranches

d.makethesmallbranchesthicker

2.Treesbecomeunhealthyifthegardener______.

a.allowstoomanybranchestogrowinthemiddle

b.doesnotprotectthemfromwind

c.forcesthemtogrowtooquickly

d.damagessomeofthesmallsidebranches

3.Whyisaspecialsubstancepaintedonthetree?

a.Tomakeawoundsmooth

b.Topreventdiseaseenteringawound

c.Tocoveraroughsurface

d.Tohelpawoundtodry

4.Agoodgardenerprunesatree______.

a.atintervalsthroughouttheyear

b.asquicklyaspossible

c.occasionallywhennecessary

d.regulareverywinter

5.Whatwastheauthor'spurposewhenwritingthis

passage?

a.Togivepraticalinstructionforpruningatree.

b.Togiveageneraldescriptionofpruning

c.Toexplainhowtreesdevelopdiseases

d.Todiscussdifferentmethodsofpruning.

答案：babca

十七

OnThursdayafternoonMrs.Carke,dressedforgoingout,tookherhandbagwithhermoneyandherkeyinit,pulledthedoorbehindhertolockitandwenttotheover60sClub.ShealwayswentthereonThursdays.Itwasaniceoutingforanoldwomanwholivedalone.

Atsixo'clockshecanehome,letherselfinandatoncesmeltcigarettesmoke.Cigarettesmokeinherhouse?How?How?Hadsomeonegotin?Shecheckedthebackdoorandthewindows.Allwerelockedorfastened,asusual.Therewasnosignofforcedentry.

Overacupofteashewonderedwhethersomeonemighthaveakeythatfittedherfrontdoor-"amasterkey"perhaps.SoshestayedathomethefollowingThursday.Nothinghappened.Wasanyonewatchinghermovements?OntheThursdayafterthatshewentoutatherusualtime,dressedasusual,butshedidn'tgototheclub.Insteadshetookashortcuthomeagain,lettingherselfinthroughhergardenandthebackdoor.Shesettleddowntowait.

Itwasjustafterfouro'clockwhenthefrontdoorbellrang.Mrs.Clarkewasmakingacupofteaatthetime.Thebellrangagain,andthensheheardherletter-boxbeingpushedopen.Withthekettleofboilingwaterinherhand,shemovedquietlytowardsthefrontdoor.Alongpieceofwireappearedthroughtheletter-box,andthenahand.Thewireturnedandcaughtaroundtheknobonthedoor-lock.Mrs.Clarkeraisedthekettleandpouredthewateroverthehand.Therewasashoutoutside,andtheskinseemedtodropoffthefingerslikeaglove.Thewirefelltothefloor,thehandwaspulledback,andMrs.Clarkeheardthesoundofrunningfeet.

1.Mrs.ClarkeloodedforwardtoThursdaybecause_______.

a.sheworkedataclubontheday

b.shesaidvisitorsonThursdays

c.shevisitedaclubonThursday

d.aspecialvisitorcameonThursday

2.Ifsomeonehadmadeaforcedentery,_______.

a.Mrs.Clarkewouldhavefoundabrokendoororwindow

b.heorshewasstillinthehouse

c.thingswouldhavebeenthownabout

d.heorshewouldhaveneededamasterkey

3.OnthethirdThursdayMrs.Clarkewentout_______.

a.becauseshedidn'twanttomisstheclubagain

b.toseeifthethiefwashngingaboutoutside

c.totheclubbutthenchangedhermind

d.inanattempttotrickthethief

4.Thelockonthefrontdoorwasonewhich_______.

a.neededapieceofwiretoopenit

b.couldheopenedfrominsidewithoutakey

c.could'tbeopenedwithoutakey

d.usedaknobinsteadofakey

5.Thewirefeeltothefloor_______.

a.becauseMrs.Clarkerefusedtoopenthedoor

b.whentheman'sglovedroppedoff

c.becauseitwastoohottohold

d.becausethemanjustwantedtogetaway

答案：cadbd

十八

Manypeoplebelievetheglarefromsnowcausessnowblindnenss.Yet,darkglassesornot,theyfindthemselvessufferingfromheadachesandwateringeyes,andevensnowblindness,whenexposedtoseveralhoursof"snowlight".

TheUnitedStatesArmyhasnowdeterminedthatglarefromsnowdoesnotcausesnowblindnessintroopsinasnow-coveredcountry.Rather,aman'seyesfrequentlyfindnothingtofoucsoninabroadexpanseofbarrensnow-coveredterrain.Sohisgazecontinuallyshiftsandjumpsbackandforthovertheentirelandscapeinsearchoftsomethingtolookat.Findingnothing,hourafterhour,theeyesneversotpsearchingandtheeyeballsbecomesoreandtheeyemusclesache.Natureoffsetsthisirritationbyproducingmoreandfluidwhichcoverstheeyeball.Thefluidcoverstheeyeballinincreasingquantityuntilvisionblurs,thenisobsured,andtheresultistotal,eventhoughtemporary,snowblindness.

ExperimentsledtheArmytoasimplemethodofovercomingthisproblem.Scoutsaheadofamainbodyoftroopsaretrainedtoshakesnowfromevergreenbushes,creatingadottedlineastheycrosscompletelysnow-coveredlandscape,Eventhescoutsthemselvesthrowlightweight,darkcoloredobjectsaheadonwhichtheytoocanfocus.Themenfollowingcanthenseesomething.Theirgazeisarrested.Theireyesfocusonabushandhavingfoundsomethingtosee,stopscouringthe

snow-blanketedlanscape.Byfocusingtheirattentionononeobjectatatime,themencancrossthesnowwithoutbecominghopelesslysnowblindorlost.Inthiswaytheproblemofcrossingasolidwhiteterrainisovercome.

1.Topreventheadaches,wateringeyesandblindnesscausedbytheglarefromsnow,darkglassesare_____.

a.indispensible

b.useful

c.ineffective

d.available

2.Whentheeyesaresoretearsareproducedto________.

a.clearthevision

b.remedysnowblindness

c.easetheirritation

d.loosenthemuscles

3.Snowblindnessmaybeavoidedby_______.

a.concentratingtothesolidwhiteterrain

b.searchingforsomethingtolookatinsnow-coveredterrain

vidingtheeyeswithsomethingtofoucson

d.coveringtheeyeballswithfluid

4.Thescoutsshakesnowfromevergreenbushesinorderto_______.

a.bivethemenbehindsomethingtosee

b.beautifythelandscape

c.warmthemselvesinthecold

d.preventthemenbehindfromlosingtheirway

5.Asuitabletitleforthispassagewouldbe_______.

a.snowblindnessandhowtoovercomeit

b.natrue'scureforsnowblindness

c.soldiersinthesnow

d.snowvision

答案：CCCAA

十九

Waterproblemsinthefuturewillbecomenoreintenseandmorecomplex.Ourincreasingpopulationwilltremendouslyincreaseurbanwastes,primarilysewage.Ontheotherhand,increasingdemandsforwaterwilldeceasesubstantialytheamountofwateravailablefordilutingwastes.Rapidlyexpandingindustrieswhichinvolvemoreandmorecomplexchemicalprocesseswillproducelargevolumesofliquidwastes,andmanyofthesewillcontainchemicalswhicharenoxious.Tofeedourrapidlyexpandingpopulation,agriculturewillhavetobeintensified.Thiswillinvolveever-increasingquantitiesofagriculturalchemicals,Fromthis,itisapparentthatdrasticstepsmustbetakenimmediatelytodevelopcorrectivemeasuresforthepollutionproblem.

Therearetwowaysbywhichthispollutionproblemcanbedwindled.Thefirstrelatestothetreatmentofwastestodecreasetheirpollutionhazard.Thisinvolvestheprocessingofsolidwastes"priorto"disposalandthetreatmentofliquidwastes,orefflunets,topermitthereuseofthewaterorminimizepollutionuponfinaldisposal.

Asecondapproachistodevelopaneconomicuseforallorapartofthewastes.Farmmanureisspreadinfieldsasanutrientororganicsupplement.Effluentsfromsewagedisposalplantsareusedinsomeareasbothforirrigationandforthenutrientscontained.Efflunetsfromotherprocessingplantsmayalsobeusedasasupplementalsourceofwater.Manyindustries,suchasmeatandpoultryprocessingplants,arecurrentlyconvertingformerwasteproductsintomarketablebyproducts.Otherindustriesarepotentialeonomicusesforwasteproducts.

1.Thepurposeofthispassageis______.

a.toalertthereadertothedwindlingwatersupply

b.toexplainindustrialusesofwater

c.toacquaintthereaderwithwaterpollutionproblems

d.todemostratevariousmeasurestosolvethepollutionproblem

2.WhichofthefollowingpointsisNOTINCLUDEDinthepassage?

a.Industrialdevelopmentincudesthesimplificationofcomplexchemicalprocesses.

b.Dilutingwastesneedscertainamountofwater

c.Demandsforwaterwillgoupalongwiththeexpandingpopulation

d.Intensivecultivationoflandrequiresmoreandmorechemicals

3.Thereadercanconcluedthat________.

a.countriesoftheworldwillworktogetheronpolutionproblems

b.byproductsfromwastesleadtoamoreprosperousmarketplace

c.scienceismakinggreatprogressonincreasingwatersupplies

d.someindustriesarenow,akingeconomicuseofwastes

4.Theauthorgivessubstancetothepassagethroughtheuseof_______.

erviewswithauthoritiesinthefieldofwatercontrols

b.opinionsandpersonalobservations

c.definitionswhichclarifyimportantterms

d.strongargumentsandpersuasions

5.Thewords"priorto"(para.2)probablymean______.

a.after

b.during

d.beyond

答案:cadbc

二十

Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnesstoadmitone'smistakes.Itisextremelyhardsometimestosayasimplethinglike"Iwaswrongaboutthat,"anditisevenhardertosay,"Iwaswrong,andyouwererightaboutthat."

Ihadanexperiencerecentlywithsomeoneadmittingtomethathehadmadeamistakefifteenyearsago.HetoldmehehadbeenthemanagerofacertaingrocerystoreintheneighbourhoodwhereIgrewup,andheaskedmeifIrememberedtheeggcartons.ThenherelatedanincidentandIbegantoremembervaguelytheincidenthewasdescribing.

Iwasabouteightyearsoldatthetime,andIhadgomeintothestorewithmaymothertodotheweeklygroceryshopping.Onthatparticularday,Imusthavefoundmywaytothedairyfooddepartmentwheretheincidenttoodplace.

Theremusthavebeenaspecialsaleoneggsthatdaybecausetherewasanimpressivedisplayofeggsindozenandhalf-dozencartons.Thecartonswerestackedthreeorfourfeethigh.Imusthavestoppedinfrontofadisplaytoadmirethestacks.Justthenawomancamebypushinghergrocerycartandknockedoffthestacksofcartons.Forsomereason,Idecideditwasuptometoputthedisplay