大学英语四级模拟试题

大学英语四级模拟试题(9)Directions:Therearefourreadingpassagesinthispart.Eachpassageisfollowedbysomequestions.ForeachquestiontherearefoursuggestedanswersmarkedA,B,CandD.YoushouldchoosetheonebestanswerandblackenthecorrespondingletterontheANSWERSHEETwithapencil.

Passage1

Howdoyousendamessagetoasubmergedsubmarine,particularlyonecarryingmiWatermaynotlooklikeabarriertocommunications,butappearancesaredeceiving.Waterstronglyabsorbsallelectromagneticwavesexceptbluegreenlightandextremelylowfrequencyradiowaves.Theverylowfrequencywavesnowusedtocontractsubmarinespenetratesonlyashortdistanceintotheocean,sothecraftmusteithersurfaceorsendupandantenna(天线)toreceivemessages,therebyincreasingitsweakness.Alasersystemaccurateoverlongdistancesandcapableofcarryingmoredatathantheverylowfrequencywaveswouldtalktosubmarineattheirnormaldepths.

Inthesystem,averybroadbeamspreadingoutfreelyinalldirectionswouldbescanned(扫描)overthousandsofsquaremilesofoceansothatitwouldn'tendangerboats,birdsorfish——orthesubmarinesitissupposedtoreach.

Sinceonlyasmallfractionofthelasersystemwillmakeitswaythroughtheairandocean,receiversmountedonthesubmarinesmustbeablenotonlytodetectthelaserbutalsotodiscriminatebetweenitandsunlight.So,militaryscientistsarenowworkinghardonspecialfilterthatallowthroughonlytheprecisewavelengthsemittedbythelaser.Thefilteredlight,whentransformedintoelectricalsignal,canthenbedecoded.Militaryplannersareconfidentthatlasercommunicationwithsubmarinesisfeasible.

1.Whichofthefollowingdoesthepassagemainlydiscuss?

A.Missilescarriedbysubmergedsubmarines.

B.Messagessentbysubmergedsubmarines.

C.Blue-greenlasersusedbysubmergedsubmarines.

D.Thewaytosendamessagetosubmergedsubmarines.

2.WhichofthefollowingisTRUEaccordingtothepassage?

A.Waterisabarriertoradiocommunication.

B.Lasershavefoundwideapplicationinsubmarinecommunication.

C.Waterabsorbsallkindsofelectromagneticwaves.

D.Verylowfrequencyradiowavescannotbeusedtocontactsubmarines.

3.WhichofthefollowingisNOTtrueofalasersystem?

A.Itisabletomakeitswaythroughwater.

B.Itisabletocommunicatewithsubmarinesatwork.

C.Itsbeamreachesasubmergedsubmarinewiththehelpofanantenna.

D.Itisabletocarrymoredatathanlowfrequencywaves.

4.Thereferenceword“it”(Sentence1,para.3)refersto.

A.theair

B.thelaserbeam

C.theocean

D.thesubmarine

5.Whowouldbeverymuchinterestedinthepassage?

A.Missilebuilders

B.Militaryscientists

C.Fishermen

D.Shipbuilder

Passage2

TheWestbeguntotakemorenoticeoftheEast.Thefifthvolumeofanenormousworkre-assessingtheChinesecontributiontoscienceandtechnologyistobepublishednextyear.Thefirstvolume,whichwaspublishedtwentyyearsago,setthetoneforthewholework.Init,evidencewasgiventoshowthatmanyinventionswhich,untilthen,westernhistorianshadclaimedforEurope,weremadefirstinChina.Theattempttorewritetheintellectualhistoryoftheworldwasnotreceivedwithoutprotestbysomereputablehistorians.However,theevidencethathasbeenpresentedsofarinthefirstfourvolumeshaspersuadedmanyhistorianswhowereskepticalatfirst.China'sinventionofpaper,printing,themagneticcompassandgunpowderhasneverbeendisputed,butthisnewhistoryhasaddedadvancedbridgedesign,mechanicalclocks,paddleboatsandmanyotherinventionstothelist.

InthefourvolumespublishedsofarnoattempthasbeenmadetoexplainwhyChinahasnotkeptupwiththeWestinscienceandtechnologyinmoderntimes.ItisprobablethattheansweristobefoundinthesocialandeconomichistoryofChina,whereastaticsocietyunderarelativelybenevolentregimeofscholar-gentrycontrastswiththepotentiallyrevolutionaryanddynamicsocietyoftheWestattheendoftheMiddleAges.Inrecentyears,theChinese

Inrecentdecades,thedisabilityrightsmovementhasbeenorganizedtofightagainsttheseinfringementsofcivilrights.Congressrespondedbypassingmajorlegislationrecognizingpeoplewithdisabilitiesasaprotectedclassundercivilrightsstatutes.

Stilltoday,peoplewithdisabilitiesmustfighttolivetheirlivesindependently.ItisestimatedthatmorethanhalfofqualifiedAmericanswithdisabilitiesareunemployed,andamajorityofthosewhodoworkareunderemployed.Abouttwo-thirdsliveatorbelowtheofficialpovertylevel.

Significantbarriers,especiallyintransportationandpublicawareness,preventdisabledpeoplefromtakingpartinsociety.Forexample,whilenolongerprohibitedbylawfrommarrying,apersonwithnoaccesstotransportationiseffectivelyexcludedfromcommunityandsocialactivitieswhichmightleadtothedevelopmentoflong-termrelationships.

Itwillonlybewhenpublicattitudesadvanceasfaraslawshavethatdisabledpeoplewillbefullyabletotaketheirrightfulplaceinsociety.

16.A“developmental"disability.

A.developsveryslowlyovertime

B.iscausedforces

C.occursinyouthandaffectsdevelopment

D.isgettingmoreandmoresevere

17.Mostdisabledpeopleusedtodieearlybecause.

A.disabilitiesdestroyedmajorbodilyfunctions

B.theywerenotverywelllookedafter

C.medicaltechniqueswerenotavailable

D.theyweretoopoortogetpropertreatment

18.Intheauthor'sopinion,toenablethedisabledpeopletotaketheirrightfulplaceinsociety.

A.morelawsshouldbepassed

B.publicattitudesshouldbechanged

C.governmentshouldprovidemoreaids

D.morepublicfacilitiesshouldbesetup

19.Whichofthefollowingcannotbeinferredfromthepassage?

A.Manydisabledpeoplemayremainsinglefortheirwholelife.

B.Thepublictendstolookdownuponthedisabledpeople.

C.Thedisabledpeoplefeelinferiortothosesurroundingthem.

D.Discriminatorylawspreventthedisabledfrommixingwithothers.

20.Thebesttitleforthispassagemightbe.

A.HandicapsofPeoplewithDisabilities

B.ThedifficultiesoftheDisabled

C.TheCausesforDisabilities

D.MedicalTreatmentsforDisabilities

PartIIIVocabularyandStructure(20minutes)

Directions:Thereare30incompletesentencesinthispart.ForeachsentencetherearefourchoicesmarkedA.,B.,C.andD..ChoosetheONEanswerthatbestcompletesthesentence.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.

21.Theguardwalkedthroughthetraineveryone'sticket.

A.inspecting

B.overlooking

C.reviewing

D.conducting

22.Itisquitenaturalthatthecustomsofallnationalminorities.

A.wouldberespected

B.wererespected

C.berespected

D.hadbeenrespected

23.Islippedonthestairsandfelldown,breakingmyleg.

A.so

B.thus

C.hence

D.therefore

24.Hetriedtoreadbutthewordsonthepagemadenoforhim.

A.message

B.explanation

C.sense

D.impression

25.Theylosttheirwayintheforest,andmademattersworsewasthatnightbegantofall.

A.it

B.which

C.what

D.that

26.Sincetherewerefivedifferentoftheaccident,itwasdifficulttoknowwhatreallyhappened.

A.outcomes

B.interpretations

C.quotations

D.paragraphs

27.Craigassuredhisbossthathewouldallhisenergiesindoingthenewjob.

A.callat

B.callon

C.calloff

D.callforth

28.Theworld'sgovernmentshavedonenothingtocombatthethreatofnuclearaccidents.

A.incidentally

B.vitally

C.virtually

D.identically

29.Thepeoplewhoobjectedtothenewapproachweretoldthatsinceworkhadalreadystartedtherewasnopointin.

A.denying

B.upsetting

C.protesting

D.competing

30.Hejustcouldn'twhatintheworldshehadbeentalkingaboutallthetime.

A.figureout

B.catchon

C.setout

D.workon

31.secondthoughtsI'vedecidedagainstbuyinganewtaperecorder.

A.On

B.With

C.At

D.But

32.Scientistssayitmaybefiveortenyearsitispossibletotestthismedicineonhumanpatients.

A.since

B.before

C.after

D.when

33.Thepolicewilldiscoverthetruthsoonerorlater,whetheryoutrytothefactornot.

A.cutback

B.setback

C.keepback

D.lookback

34.nothingtotalkabout,theheadsaidgood-byeandwentoutoftheroom.

A.Therewas

B.Being

C.Astherebeing

D.Therebeing

35.Johnsonofferedarewardtowouldfindthelostringforhiswife.

A.who

B.whom

C.whoever

D.whomever

36.ThisisthereasonIcamehere.

A.that

B.what

C.forwhich

D.ofwhich

37.Inthepastmengenerallypreferredthattheirwivesathome.

A.worked

B.wouldwork

C.work

D.towork

38.Mistakescarelessnessmayhaveseriousconsequences.

A.dueto

B.thankto

C.owingto

D.becauseof

39.Itseemstobehightimethatthisargumentputtoanend.

A.mustbe

B.is

C.were

D.shouldbe

40.Thechildwas.Hemadeupawonderfulstorywhenhewasgivenonlythebeginningofit.

A.imaginal

B.imaginary

C.imagery

D.imaginative

41.Shewillcometocallonthemomentsheherwork.

A.hasfinished

B.hadfinished

C.finishes

D.willfinish

42.Havingmissedthatlastbus,Bobhadnoalternativeataxihomethoughhedidnotliketheidea.

A.buttotake

B.taketobut

C.tobuttake

D.t