英语四级作文.docx

英语四级作文.docx

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英语四级作文

英语四级试题下载

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,mark

　　Y（forYES）ifthestatementagreeswiththeinformationgiveninthepassage;

　　N（forNO）ifthestatementcontradictstheinformationgiveninthepassage;

　　NG（forNOTGIVEN）iftheinformationisnotgiveninthepassage.

　　Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.

　　Space

　　OurFutureinSpace:

ItHasAlreadyBegun!

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

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

　　It’snotagiant,StarWarsmother-ship.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’tquiteasclear-cutasjustdescribed.

　　1.Thegiant,sphericalspaceshipmentionedinthepassageisvirtuallytheplanetEarth.

　　2.Accordingtotheauthor,somepersonshavelefttheEarthandtraveledintoouterspacewithinthepast25years.

　　3.Scientistshavealreadydesignedspecialspacefactories,whichmanufacturespecialproductsandtoolsforspaceuse,suchasmedicineandperfectballbearings.

　　4.Accordingtotheinformationofthepassage,wecaninferthatiftheEarthbecomestoocrowdedornolongersuitableformentodwellonsomeday,they’llhavetomoveintospace.

　　5.Themoonandtheasteroidsarealikewithrespecttotheirrich,valuablemetals.

　　6.UltravioletlightinspaceplacesscorchesourskinasseriouslyasitdoesonEarth.

　　7.Evenashorttripinouterspacemaydosomedamagetoone’sbrain.

　　1.[Y][N][NG]2.[Y][N][NG]3.[Y][N][NG]4.[Y][N][NG]

　　5.[Y][N][NG]6.[Y][N][NG]7.[Y][N][NG]

　　8.Thereasonsomemetalalloyscan’tbemadeonEarthisthattheheaviermetals

　　togetherwiththelighterones.

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

　　10.Accordingtotheauthor,willbecausedtoamaningravityfreespace.

　　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]Customerandrepairman.

　　Questions19to22arebasedontheconversationyouhavejustheard.

　　19.[A]Thebenefitsofstrongbusinesscompetition.

　　[B]Aproposaltolowerthecostofproduction.

　　[C]Complaintsabouttheexpenseofmodernization.

　　[D]Suggestionsconcerningnewbusinessstrategies.

　　20.[A]Itcostsmuchmorethanitsworth.

　　[B