6大学英语四级考试全真模拟卷B.docx

6大学英语四级考试全真模拟卷B.docx

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6大学英语四级考试全真模拟卷B

大学英语四级考试全真预测试卷

ModelTestTwo

PartIWriting（30minutes）

Directions:

Forthispart,youareallowed30minutestowriteacompositiononthetopicShouldSmokingBeCompletelyBanned.Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelowinChinese:

1.有人赞同完全禁止吸烟，理由是……

2.有人不赞同完全禁止吸烟，理由是……

3.我的看法。

ShouldSmokingBeCompletelyBanned

PartIIReadingComprehension（SkimmingandScanning）

（15minutes）

Directions:

Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,choosethebestanswerfromthefourchoicesmarked［A］,［B］,［C］and［D］.Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.

Space

OurFutureinSpace:

ItHasAlreadyBegun!

Weareallspacetravelers.Butwe’vestayedclosetohomeuntilnow.Oneday,wemayleaveour“mothership”Earthtomakeourhomeamongthestars.

Agiant,spherical“spaceship”,about8,000milesindiameter,isspeedingthroughthesolarsystemrightnow.Itiscruisingatanincredible66,600milesperhour.

It’snotagiant,StarWarsmothership.It’sspaceshipEarth,thehomeofoverfourbillionpeople.Thiswatercoatedspaceshiphasbeentravelingthroughtheuniverseforaboutfivebillionyears.Onlywithinthepast25years,however,havesomeofitspassengersbrokenfreeofEarth’sgravity.

But25yearsfromnow,manypeople,includingyou,mightliveinanorbitingspacestation200milesabovetheEarth.

SpaceCities

Scientistshavealreadydesignedspecialspacefactories.Thesefactorieswilltakeadvantageoftheabsenceofgravity（zerogravity）toproduceeverythingfromlife-savingdrugstoperfectballbearings.

Otherscientistshavedesignedspacecolonies,completewithfarms,schools,andartificialdayandnight.Hundreds,oreventhousands,ofpeoplewilllive,work,play—evengotoschool,farabovetheEarth.

Ourconquestofspace,ofcourse,hasalreadybegun.WehaveexploredpartoftheMoon,sentrobotspaceshipsontothesurfaceofVenusandMars,andaimedspaceprobespasttheplanetsofJupiterandSaturn.

LastJune,onerobotship,Pioneer10,leftoursolarsystemforever.AndastronautsfromboththeSovietUnionandtheUnitedStateshavelivedinspacestations.

Theconquestofspace,withoutquestion,isoneofthegreatestadventureshumanbeingshaveeversetouton.Butitmaybemorethanagreatadventure.Somescientiststhinktheconquestofspacemaybeanecessityforsurvivalofthehumanspecies.

WearetearingupmoreandmoreoftheEarthtogetrawmaterialsforindustry.Andwearepollutingtheairandwateraswemanufactureproductsthatweneedorwant.Almosteverythingthatseemstomakeourlivesmorecomfortable,andfromelectricitytopesticides,usesuporaltersapieceofourplanet’snaturalenvironment.

WhyGointoSpace?

Yetoursolarsystemisfullofresources.Themoonischockfullofvaluablemetals.Soaretheasteroids,thesmall,rocky,planet-likebodiesorbitingthesunmostofthembetweenMarsandJupiter.Thesemetals,ifwecangetthem,couldbeusedtobuildfactoriesandspacestations.Also,inspace,thereisnoatmospheretofilteroutthesun’senergy.Thereisplentyofsolarenergytobeturnedintoelectricityformanufacturing,forcreatingcomfortablelivingconditions.

GettingawayfromEarthhasotheradvantages,too.Modernindustryusesmanykindsofmetalalloys（mixturesofmetalthatarebetterforcertainpurposesthanpuremetals）.Yetsomemetalalloyseithercan’tbemadeorareveryexpensivetomakeonEarthbecauseofgravity.Forinstance,certainmetalsdon’tmixwellonEarth.Butinzerogravity,molten（hot,liquid）metalsmixmoreevenly.Thisisbecausethereisnogravitytopulltheheaviermetalsdown,whilethelighteronesfloatontop.

Fromspace,too,wecanlookdownontheEarthandstudytheatmosphere,itsweather,andtheeffectsofairpollution.

Andbecausethereisnostronggravitytobreakfreefrom,ourfuturehomesawayfromEarthwillbeconvenientstartingpointsfortraveltodistantplanets.

But,whilegoingintospacemightsolvesomeproblems,outerspacecanalsobeadangerousplace.Forexample,inouterspace,wehavetoprotectourselvesfromthedangersofultravioletlightandcosmicrays.UltravioletlightfromthesuncangiveusbadsunburnsrighthereonEarth.Yet,Earth’satmospherescreensoutmostofthatharmfulradiation.Cosmicraysaretinyhighenergyparticlesfromouterspace.Again,theEarthshieldsusfrommostofthem.

AtHomeinSpace?

Butinspace,withoutspecialprotection,wewouldbeexposedtomuchstrongerradiationfromultravioletlightandcosmicrays.Also,inthezerogravityofouterspace,ourboneswilllosecalciumandbecomeweaker.Thiswillbemoreofaproblemthelongerpeoplestayoutinspace.Doctorsarelookingforawaytokeepourbonesfromlosingcalciuminouterspace.Andasmallspaceshipjustmight“driveyoubatty”afterawhile.Butevenonashorttripinouterspace,youmightnotfeelaswellasyou’dliketo.Spacetravelcouldmakeyouseasick!

Yet,theseriskswon’tkeeppeoplefromgoingintospace.Eventually,anEarth-likeenvironmentwillbebuiltinspace.Andtheywillbepopulatedbypeoplewithmanydifferentinterests:

medicine,construction,farming,teaching,mining,andsoon.

Thenexthundredyearswillbefilledwithotherworldlyadventures,excitingscientificdiscoveries,anddanger,ashumansleaveEarth—perhapsforever.

AginginSpace

Supposeaspacetravelerismovingatavelocityof186,200milespersecond.Foreveryhourthatpassesforhim,30hourspassonEarth.Ifhetravelsforayearinthisfashion（havingacceleratedinstantaneously）andthenturnsaroundandcomesbackatthisspeed（havingturnedaroundinstantaneously）,hewillfindthatwhilehehasseemedtohimselftohavetraveledtwoyears,themenonEarthwouldclaimhehadbeenabsentfor30years.

Supposethespacetravelerhadleftattheageof30,leavingbehindatwinbrotheralsoaged30.Whenhereturnedhewouldbe32,buthisstay-at-hometwinbrotherwouldbe60.Thatiswhythe“clockparadox”,issometimescalledthe“twinparadox”.

Ofcourseittakesquitealongwhiletoacceleratetoahighspeed,andalongwhiletomakeaturnandheadbackagain,soconditionsaren’tquiteasclearcutasjustdescribed.

1.Thegiant,sphericalspaceshipmentionedinthepassageis.

［A］theouterspace［B］aman-madespaceship

［C］theplanetEarth［D］theStarWarsmother-ship

2.Somepersonshavetraveledintoouterspaceafterconqueringwithinthepast25years.

［A］theuniverse［B］Earth’sgravity

［C］theearth［D］outerspace

3.Wehaveexploredorsentrobotspaceshipstothefollowingspaceexcept.

［A］themoon［B］Venus［C］Jupiter［D］Mars

4.Whyistheconquestofspacemorethanagreatadventure?

［A］Becauseitisfullofchallengesforhumanbeings.

［B］Becauseitmaybenecessaryforhumanbeingstosurvive.

［C］Becauseitisthegreatestadventureinhumanhistory.

［D］Becauseitismoreexcitingthananyotheradventures.

5.Themoonandtheasteroidsarealikewithrespecttotheir.

［A］sizeandmovingways［B］comfortablelivingconditions

［C］richandvaluablemetals［D］solarenergy

6.Whycan’tultravioletlightscorchourskinonEarthasseriouslyasitdoesinspaceplaces?

［A］BecausetheEarth’satmospherecanmakeultravioletlightlessharmful.

［B］Becauseultravioletcan’treachtheEarthatall.

［C］BecausetheEarthisfarawayfromthoseplanetsradiatingultravioletlight.

［D］Becauseotherspaceplacesisnearfromthoseplanetsradiatingultravioletlight.

7.Inspiteofmanyrisks,scientistswillfinallybuildinspacesuitableforhumanstolive.

［A］anenvironmentwithoutultravioletlight

［B］alotofhomes

［C］anEarth-likeenvironment

［D］anenvironmentwithatmosphere

8.Thereasonsomemetalalloyscan’tbemadeonEarthisthattheheaviermetals___________togetherwiththelighterones.

9.Inspace,thereisnoatmospheretofilteroutthesun’senergy.Thereisplentyofsolarenergytobeturnedinto_____________,forcreatingcomfortablelivingconditions.

10.Accordingtotheauthor,__________________willbecausedtoamaningravity-freespace.

PartIIIListeningComprehension（35minutes）

SectionA

Directions:

Inthissection,youwillhear8shortconversationsand2longconversations.Attheendofeachconversation,oneormorequestionswillbeaskedaboutwhatwassaid.Boththeconversationandthequestionswillbespokenonlyonce.Aftereachquestiontherewillbeapause.Duringthepause,youmustreadthefourchoicesmarked［A］,［B］,［C］and［D］,anddecidewhichisthebestanswer.ThenmarkthecorrespondingletteronAnswerSheet2withasinglelinethroughthecentre.

11.［A］Tennisequipment.

［B］Volleyballequipment.

［C］Footballequipment.

［D］Basketballequipment.

12.［A］Hemustmeethisteacher.

［B］Hemustattendaclass.

［C］Hemustgooutwithhisgirlfriend.

［D］Hemuststayatschooltofinishhishomework.

13.［A］It’snotasgoodasitwas.［B］It’sbetterthanitusedtobe.

［C］It’sbetterthanpeoplesay.［D］It’sevenworsethanpeoplesay.

14.［A］Becausehedoesn’tlikefootball.

［B］BecauseMariafellill.

［C］Becausehedidn’thavethetime.

［D］BecauseMariacan’tstandfootball.

15.［A］Atemporaryjob.

［B］Apermanentjob.

［C］Somemoneyforthevacation.

［D］Somemoneyfortheuniversityfees.

16.［A］Thewomandidmostofthetalking.

［B］Themandidmostofthetalking.

［C］Thewomanwaswearingablacksweater.

［D］Themanandthewomanhaddarkhair.

17.［A］Asunnyday.［B］Araincoat.

［C］Anattractivehut.［D］Alovelyhat.

18.［A］Librarianandstudent.［B］Operatorandcaller.

［C］Bossandsecretary.［D