英语四级模拟题带答案.docx

英语四级模拟题带答案.docx

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英语四级模拟题带答案

大学英语四级考试模拟题一

PartⅠWriting（30minutes）

Directions：

Forthispart,youareallowed30minutestowriteashortessayonthetopic:

ONE–OFFCHOPSTICKS.Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelowinChinese：

1.你和你的朋友在餐厅就餐，你的朋友对餐厅提供的非一次性筷子不满。

2.餐厅的负责人解释说这是为了节约资源，并保证这些餐具已经严格消毒；

3.你对此事的看法和采取的做法。

　　One-offChopsticks

注意：

此部分试题在答题卡1上。

PartⅡReadingComprehension（SkimmingandScanning）（15minutes）

Directions：

Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,choosethebestanswerfromthefourchoicesmarkedA,B,CandD.Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.

考试就注意：

此部分试题请在答题卡1上作答；8-10题在答题卡1上。

　　PlasticBagPollution

Theuseofplasticbagshasincreasedatanalarmingratesincetheybecamepopularinthe1980s.Bigblackbinliners,plasticcarrierbagscarryingadvertisinglogos,clearsandwichbagsandavarietyofotherforms.They’relightweight,handyandeasilydiscarded.Tooeasilydiscarded.Justtakealookaroundyou.Plasticbagscanbeseenhangingfromthebranches,flyingintheair,settledamongstbushes,andfloatingonrivers.Theyblockupdrainscausingwaterandsewagetooverflowandbecomethebreedinggroundsofbacteriathatcausediseases.

Plasticbagsaredifficultandcostlytorecycleandmostenduponlandfillsiteswheretheytakearound300yearstodecay.Theybreakdownintotinytoxicparticlesthatpollutethesoilandwaterwaysandenterthefoodchainwhenanimalsaccidentallyconsumethem.Buttheproblemssurroundingwasteplasticbagsstartlongbeforetheydecay.Ourplanetisbecomingincreasinglyendangeredbyourover-useofplasticbags.

ProductionofPlasticBags

Plasticbagsaremadefromethylene（乙烯），agasthatisproducedasaby-productofoil,gasandcoalproduction.Ethyleneismadeintopolymers（聚合体）—chainsofethylenemolecules—calledpolyethylene.Thissubstance,alsoknownaspolythene,isusedtoproducearangeofitems,includingplasticbags.

Youhaveprobablynoticedtwotypesofplasticshoppingbags—thelighter,filmybagsyougetfromsupermarketsandfoodoutlets,andtheheavierbagsfromotherretailoutlets,likeclothingstores.Thesupermarketbagsaremadefromhighdensitypolyethylene（HDPE）,whilethethickerbagsaremadefromlowdensitypolyethylene（LDPE）.UnlikeHDPE,LDPEcannotberecycled.Whileplasticbagsmaynotbethemosthightechapplicationofplasticstechnology,itiscertainlyoneofthemostprevalent.AccordingtoCleanUpAustralia,Australiansuseinexcessof6billionplasticbagsperyear.Iftiedtogetherthesebagswouldformachainthatislongenoughtogoaroundtheworld37times.Morethanhalfofthesebags（3.6billion）aremadefromHDPE.

DangerstoSeaLife

Plasticbagsarenowamongstthetop12itemsofwastemostoftenfoundalongthecoastlines.Animalsandseacreaturesarehurtandkilledeverydaybydiscardedplasticbags—adeadturtlewithaplasticbaghangingfromitsmouthisn’tapleasantsightbutmistakingplasticbagsforfoodiscommonplaceamongstmarineanimals.Plasticblockstheirintestines（肠道）andleadstoslowstarvation.Othersbecomeentangledinplasticbagsanddrown.

Becauseplasticbagstakehundredsofyearstobreakdown,everyyearourseasbecome“home”tomoreandmorebagsthatfindtheirwaytherethroughoursewersandwaterways.Everybagthat’swasheddownadrainduringrainfallendsupinthesea;everybagthat’sflusheddownatoiletendsupinthesea;everybagthat’sblownintoariverwillmostlikelyendupinthesea.Onedisquietingfactstemmingfromthisisthatplasticbagscanbecomeserialkillers.Onceananimaldietofplasticbags,itdecaysatamuchfasterratethanthebag.Oncetheanimalhasdecomposed,thebagisreleasedbackintotheenvironmentmoreorlessintact,readytobeeatenbyanothermisguidedorganism.Theincrediblyslowrateofdecayofplasticbagsalsomeansthateachbagweusecompoundstheproblem,becausethebagssimplyaccumulate.

PollutionTaxes&Bans

Differentcountrieshaveadoptedarangeofapproachestodiscouragetheuseofplasticbagsinanattempttocutdownonthenumberofbagsfindingtheirwayintotheenvironment.InSouthAfricaforinstance,whereanestimatedeightbillionplasticbagsareusedannually,thegovernmenthasimplementednewregulationsthatwillseeonlythicker,moredurableplasticbagsproduced.Aswellasmakingthemmoresuitableforreuse,itishopedthattheextracostassociatedwiththeirproductionandsupplywillpreventretailersgivingthehigherqualitybagsaway,makingtheiruseamoreexpensiveoptionforconsumers.

TheuseofplasticbagsisbeingdiscouragedinotherplacessuchasSingaporeandTainwan,whilethetaximposedontheuseofplasticshop