大学英语四级模拟题十三及答案.docx

大学英语四级模拟题十三及答案.docx

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大学英语四级模拟题十三及答案

2014年大学英语四级模拟题十三及答案

PartⅡReadingComprehension（35minutes）

Directions:

Thereare4passagesinthispart.Eachpassageisfollowedbyso

mequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA）,B）,C）andD）.Youshoulddecideonthebestchoiceandmarkthecorresponding

letterontheAnswerSheetwithasinglelinethroughthecenter.

Questions21to25arebasedonthefollowingpassage:

Someradiosingalswereheardin1967.Theywerecomingfromapointintheskywheretherewasunknownstar.Theywerecomingveryregularly,too:

aboutonceaseco

nd,iftheywerecontrolledbyclock.

Thescientistswhoheardthesignalsdidnottellanybodyelse.Theywereratherafraidtotellincasetheyfrightenedpeople.Thesignalswerecomingfromaverysmallbody—nobigger,perhapsthantheearth.Wasthatwhynolightcouldbeseenfromit?

Orwerethesignalscomingfromaplanetthatbelongedtosomeotherstar?

Therewasnoendtothequestions,butthescientistskeptthenewssecret.“Perhapsthereareintelligentbeingsoutthere.”theythought,“whoaretryingtosendmessagestootherplanets,ortous?

Sothenewswasnotgiventothenewspaper.Instead,thescientistsstudiedthesignalsandsearchedforotherslikethem...Well,allthathappenedin1967and1968.Sincethenscientistshavelearntmoreaboutthosestrange,regular,radiosignals.Andtheyhavetoldthestory,ofcourse.

Thesignalsdonotcomefromaplanet;theycomefromanewkindofstarcalleda“pulsar””.Aboutahundredotherpulsarshavenowbeenfound,andmostofthem

areverylikethefirstone.

Pulsarsarestrongradiostars.Theyarethesmallestbuttheheavieststarsweknowatpresent.Ahandfulofpulsarwouldweighafewthousandtons.Theirlight—iftheygivemuchlight—istoosmallforustosee.Butwecanbesureofthis,nointelligentbeingsarelivingonthem.

21.Theradiosignalsdiscussedinthispassage____.

A.wereregularB.werecontrolledbyaclock

C.wereheardin1967onlyD.weresecretmessages

22.Theradiosingalsweresentby____.

A.asatelliteB.aplanet

C.askybodywhichwasunknownatthattime

D.intelligentbeingswhowereunknownatthattime

23.Thescientistsdidnottellpeopleaboutthesignalsbecause____.

A.thesingalsstoodforsecretmessages

B.peoplewouldaskthemtoomanyquestions

C.theydidnotwanttofrightenpeople

D.theystoodforunimportantmessages

24.Apulsaris____.

A.asmallheavystarwhichsendsoutstrongradiosignalsandcannotbeseen

B.asmallheavyplanetwhichsendsoutstrongradiosignalsandcannotbeseen

C.asmallheavysatellitewhichsendsoutstrongradiosignalsandcannotbeseen

D.asmallintelligentbeingwhosendsoutstrongradiosignalsandcannotbeseen25.Whichofthefollowingistrue?



A.Oneofthepulsarsfoundbyscientistssendsradiosignals.

B.Pulsarbegantosendradiosingalsin1967.

C.Scientistshavesearchedforpulsarsformanyyearsbutfoundnone.

D.Scientistshavefoundmanypulsarssince1967.

Questions26to30arebasedonthefollowingpassage:



Overvastareasofeverycontinent,therainfallandvegetationnecessaryforlifearedisappearing.Alreadymorethan40percentoftheearth'slandisdesertor

desertlike.About628millionpeople—oneoutofseven—liveinthesedryregions.Inthepast,theyhavemanagedtosurvive,butwithdifficulty.[ZZ（Z]Nowlargelythroughproblemscausedbymodernlife,theirexistenceisthreatenedbytheslow,steadyspreadoftheearth'sdeserts.

Scientistsstilldonotunderstandallthecomplexproblemsofthedesert,buttherehavebeenmanyideasforsavingtheland.SandiArabiahasplanted10million

treestohelpkeepthesandfromtakingoverfertileareas.TheIsraelisareaga

inusingsomeofthewatercollectionsystemsleftbytheancientpeopleinthe

Negevdesert.Theyplantowatertheirorchardswiththeextrawater.SomeSahelfarmersstillraisecattleontheirpoorfarmland,butbeforethecattlearesold,

theyaretakentogreenerlandsinthesouthtogetfat.

26.Whatisthearticlemainlyconcerned?



A.Theproblemofspreadingdesert.

B.Therainfallandvegetationindesertareas.

C.Thewatercollectionsystems.

D.Thedifferencebetweenmodernlifeandancientlife.

27.“oneoutofseven”refersto____.

A.morethanathirdofthelands'earth

B.thepercentageoftheearth'slandthatisdesert-like

C.thenumberofpeoplewholiveindryregions

D.adayofaweek

28.Inparagraph2,“theyaretakentothegreenerlandsinthesouth.”They

refersto____.

A.theSahelfarmlandB.thefarmers

C.thecattlesD.thetrees

29.Howmanyideasforsavingthelandaredescribed?



A.Five.B.Two.

C.Four.D.Three.

30.Whichofthefollowingstatementsistrue,accordingtothepassage?



A.Theearth'sdesertareslowlyspreading.

B.Oneoutof10peoplelivesindryregions.

C.Theirlifeinthedesertisthreatenednowbytraditionalproblems.

D.NewwaterwellscansolvetheprobleminAfrica'sdesert.

Questions31to35arebasedonthefollowingpassage:

Telephone,television,radio,andtelegraphallhelppeoplecommunicatewith

eachother.Becauseofthesedevices,ideasandnewsofeventsspreadquicklyall

overtheworld.Forexample,withinseconds,peoplecanknowtheresultsofan

electioninanothercountry.Aninternationalfootballmatchcomesintothehomes

ofeveryonewithatelevisionset.Newsofadisastersuchasanearthquakeora

floodcanbringhelpfromdistantcountrieswithinhours,helpisontheway.Becauseofmoderntechnologylikethesatellitesthattravelaroundtheworld,informationtravelsfast.

Howhasthisspeedofcommunicationchangedtheworld?

Tomanypeople,theworldhasbecomesmaller.Ofcoursethisdoesnotmeanthattheworldisactuallyphysicallysmaller.Itmeansthattheworldseemssmaller.Twohundredyearsago,communicationbetweenthecontinentstookalongtime.Allnewswascarriedonshipsthattookweeksorevenmonthstocrosstheocean.Intheseventeenthandeighteenthcenturies,ittooksixweeksfornewsfromEuropetoreachAmerica.Thistimedifferenceinfluencedpeople'sactions.Forexample,onebattle,orfight,intheWarof1812betweenEnglandandtheUnitedStatescouldhavebeenavoided.Apeaceagreementhadalreadybeensigned.PeacewasmadeinEngland,butthenewsofpeacetooksixweekstoreachAmerica.Duringthesesixweeks,thelargeandseriousBattleofNewOrleanswasfought.Manypeoplelosttheirlivesafterapeacetreatyhadbeensigned.Theywouldnothavediedifnewshadcomeintime.Inthepast,communicationtookmuchtimethanitdoesnow.

Therewasagoodreasonwhytheworldseemedsomuchlargerthanitdoestoday.

31.Newsspreadsfastbecauseof____.

A.moderntransportationB.newtechnology

C.thechangeoftheworldD.apeaceagreement

32.Accordingtothispassage,____isveryimportanttopeopleinadisasterarea.

A.fastcommunicationB.moderntechnology

C.latestnewsD.newideas

33.Whichofthefollowingstatementsistrue?



A.Theworldnowseemssmallerbecauseoffastercommunication.

B.Theworldisactuallysmallertoday.

C.Theworldischangingitssize.

D.ThedistancebetweenEnglandandAmericahaschangedsincetheWarof1812

34.Twohundredyearsago,newsbetweenthecontinentswascarried____.

A.bytelephoneandtelegraphB.byland

C.byairD.bysea

35.TheNewOrleansBattlecouldhavebeenavoidedifthepeaceagreementhadbeensigned____.

A.bybothsidesB.intime

C.inAmericaD.inEngland

Questions36to40arebasedonthefollowingpassage:



Theconceptofpersonalchoiceinrelationtohealthbehaviorsisanimportantone.Anestimated90percentofallillnessesmaybepreventableifindividualswouldmakesoundpersonalhealthchoicesbaseduponcurrentmedicalknowledge.

Weallenjoyourfreedomofchoiceanddonotliketoseeitrestrictedwhenitiswithinthelegalandmoralboundariesofsociety.[ZZ）]ThestructureofAmericansocietyallowsustomakealmostallourownpersonaldecisionsthatmayconcernourhealth.Ifwesodesire,wecansmoke,drinkexcessively,refusetowearseat

belts,eatwhateverfoodswewant,andliveacompletelysedentarylife-stylewithoutanyexcuse.Thefreedomtomakesuchpersonaldecisionsisafundamentalaspectofoursociety,althoughthewisdomofthesedecisionscanbequestioned.Personalchoicesrelativetohealthoftencauseadifficulty.Asoneexample,ateenagermayknowthefactsrelativetosmokingcigarettesandhealthbutmaybepressuredbyfriendsintobelievingitisthesociallyacceptedthingtodo.Amultitudeoffactors,bothinheritedandenvironmental,influencethedevelopmentofhealthrelatedbehaviors,anditisbeyondthescopeofthistexttodiscussallthesefactorsastheymayaffectanygivenindividual.However,thedecisiontoadoptaparticularhealth-relatedbehaviorisusuallyoneofpersonalchoices.

Therearehealthychoicesandthereareunhealthychoices.Indiscussingthemoralofpersonalchoice,FriesandCrapodrewacomparison.[ZZ（Z]Theysuggestthattoknowinglygiveoneselfovertoabehaviorthathasastatisticalprobabilityofshorteninglifeissimilartoattemptingsuicide.[ZZ）]Thus,forthoseindividuals

whoareinterestedinpreservingboththequalityandquantityoflife,personalhealthchoicesshouldreflectthosebehaviorsthatareassociatedwithstatisticalprobabilityofincreasedvitalityandlongevity.

36.Theconceptofpersonalchoiceconcerninghealthisimportantbecause____.

A.personalhealthchoiceshelpcuremostillnesses

B.ithelpsraisethelevelofourmedicalknowledge

C.itisessentialto