四级模拟题一Word格式.docx

四级模拟题一Word格式.docx

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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.asatelliteB.aplanet

　　C.askybodywhichwasunknownatthattime

　　D.intelligentbeingswhowereunknownatthattime

　　23.Thescientistsdidnottellpeopleaboutthesignalsbecause____.

　　A.thesingalsstoodforsecretmessages

　　B.peoplewouldaskthemtoomanyquestions

　　C.theydidnotwanttofrightenpeople

　　D.theystoodforunimportantmessages

　　24.Apulsaris____.

　　A.asmallheavystarwhichsendsoutstrongradiosignalsandcannotbeseen

　　B.asmallheavyplanetwhichsendsoutstrongradiosignalsandcannotbeseen

　　C.asmallheavysatellitewhichsendsoutstrongradiosignalsandcannotbeseen

　　D.asmallintelligentbeingwhosendsoutstrongradiosignalsandcannotbeseen

　　25.Whichofthefollowingistrue?

　　A.Oneofthepulsarsfoundbyscientistssendsradiosignals.

　　B.Pulsarbegantosendradiosingalsin1967.

　　C.Scientistshavesearchedforpulsarsformanyyearsbutfoundnone.

　　D.Scientistshavefoundmanypulsarssince1967.

　　rnlifeandancientlife.

　　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,influencethedevelopmentofhealthrelatedbehaviors,anditisbeyondthescopeofthistexttodiscussallthesefactorsastheymayaffectanygivenindividual.However,thedecisiontoadoptaparticularhealth-relatedbehaviorisusuallyoneofpersonalchoices.

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

　　36.Theconceptofpersonalchoiceconcerninghealthisimportantbecause____.

　　A.personalhealthchoiceshelpcuremostillnesses

　　B.ithelpsraisethelevelofourmedicalknowledge

　　C.itisessentialtopersonalfreedominAmericansociety

　　D.wrongdecisionscouldheadtopoorhealth

　　37.To“liveacompletelysedentarylifestyle”（Para.1）inthepassagemeans____.”

　　A.toliveaninactivelifeB.toliveadecentlife

　　C.tolivealifewithcompletefreedom

　　D.tolivealifeofvice

　　38.Soundpersonalhealthchoiceisoftendifficulttomakebecause____.

　　A.currentmedicalknowledgeisstillinsufficient

　　B.therearemanyfactorsinfluencingourdecisions

　　C.fewpeoplearewillingtotradethequalityoflifeforlongevity

　　D.peopleareusuallyinfluencedbythebehavioroftheirfriends

　　39.ToknowinglyallowoneselftopursueunhealthyhabitsiscomparedbyFriesandCrapoto____.

　　A.improvingthequalityofone'

slife

　　B.limitingone'

spersonalhealthchoice

　　C.deliberatelyendingone'

　　D.breakingtherulesofsocialbehavior

　　40.AccordingtoFriesandCraposoundhealthchoicesshouldbebasedon____.

　　A.personaldecisionsB.lawsofsociety

　　C.statisticalevidenceD.opinionsoffriends

PartⅢVocabularyandStructure（20minutes）

Thereare30incompletesentencesinthispart.ForeachsentencetherearefourchoicesmarkedA）,B）,C）andD）.ChoosetheONEanswerthatbestcompletesthesentence.Thenmarkthe