学年外研必修第二册 Unit6 Earth first单元自测卷含答案.docx
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学年外研必修第二册 Unit6 Earth first单元自测卷含答案.docx
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学年外研必修第二册Unit6Earthfirst单元自测卷含答案
Unit6Earthfirst单元自测卷
时间:
100分钟 满分:
120分
选择题部分
第二部分 阅读理解(共两节,满分40分)
第一节(共15小题;每小题2分,满分30分)
阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。
A
Thegentlegiantsofouroceansarewhalesharks.It'sthebiggestwhalesharkandcanreachaslongas41.5feet,andtheseamazingcreaturesarenotonlythebiggestsharks,buttheyarealsobiggestfishofanykind.
Whalesharkshavealifespanof70yearsonaverage,andtheyspendtheirdaysgentlyswimminginthewarmandtropicaloceans.
Theirteetharethesizeofmatchheads,andwhiletheirjawscouldbepowerful,theyhavenevertendedtoattackhumans.Theirteethplaynoroleineating,asplankton(浮游生物)doesnotneedtobechewed.Theyaretobefoundinnumbersinthewarmeroceansandtheypreferthedeepwatersofopenoceans.Theytendtotravelalone.
Severaltimesayeartheygathertogetherincertainspotswhereplanktonisplentiful.Thoseareasareallwithina30°northorsouthlatitudefromtheequator.Sadlywhalesharksaretargetedbycommercialfisheriesatthosespots.
Howeasyitmustbeforthefishermentocatchthosebeautifulcreatureswhocanonlyswimat3.5milesperhour!
Sogreatalossinnumbershavetheysufferedthatwhalesharksarenowlistedasoneoftheendangeredspecies.Somecountrieshavestartedtotakemeasurestoprotectthewhalesharksfromextinction.
ThePhilippines,IndiaandTaiwanhaveallbannedthefishing,selling,importingandexportingofwhalesharksforcommercialpurposes.However,thelawdoesn'tseemtobeeffectivebecausethehuntingandkillingstillgoesontoday,especiallyinTaiwanandthePhilippines.Eachwhalesharkcanfetcharound$21,000.InpartsofAsiatheyareknownasthe“moneyshark”.
Themightydollarwinsagainatgreatcosttoourhabitat,andwewillnotknowwhatwehavelostuntilwehavelostitforever.Therefore,itishightimeforustodosomethingforthewhalesharks.
1.Wecanlearnfromthepassagethatwhalesharks________.
A.usuallylivealifeofmorethan70years
B.alwaystravelintheoceaningroups
C.dependontheirteethtoharvesttheirfood
D.liveinthedeepwatersofwarmeroceans
2.Whycanthewhalesharksbecaughteasily?
A.Becausetheyswimintheoceansataslowspeed.
B.Becausetheyaresurroundedbysomanyfisherman.
C.Becausetheyoftengathertogether.
D.Becausetheynevertendtoattackhumansinthewater.
3.Itisimpliedinthepassagethat________.
A.whalesharkswillbeextincteveniftheyareprotected
B.whalesharksarethemostdangerousmarineanimals
C.thereisnolawaboutbanningthefishingofwhalesharks
D.thehugeprofitistoblameforthedecreasingnumbersofwhalesharks
4.Whatisthemainpurposeofthispassage?
A.Toappealtopeopletoprotectwhalesharks.
B.Toadvisethegovernmenttomakerelatedlaws.
C.Toguidepeoplehowtofishandkillwhalesharks.
D.Toanalyzethevalueofwhalesharks.
B
Elephantsmightbethemostwell-knownandwell-lovedanimalinAfricanwildlife.Butconservation(保护)oftheAfricanelephantfacesspecialdifficulties.Whiletheelephantpopulationishalfofwhatitwas40yearsago,someareasofAfricahavemoreelephantsthanpopulatedareascansupport.That'swhyAWFscientistsarestudyingelephantbehavior,protectinghabitatsandfindingwaysforhumanstolivepeacefullywithelephantsinAfrica.
Yearsago,overhuntingandtheivorytradewerethebiggestthreatstoelephants'survival.Luckily,ivorybans(禁令),huntingrulesandprotectedareasprotectelephantsfromthesedangerstoday.
The21stcenturybringsadifferentchallengetoelephantconservation—land-use.Elephantswalkacrossbordersandoutsideparksandotherprotectedareas.Sotheyoftendestroycrops,causingconflicts(冲突)betweenlocalfarmersandthesebiganimals.
Successfulconservationstrategies(策略)mustallowelephantstowalkfreelyintheirnaturalhabitatswhilereducingconflictsbetweenelephantsandlocalpeople.
AWFresearchersaresearchingforawaytogivebothelephantsandpeoplethespacetheyneed.TheAWFiscollectinginformationonelephanthabitatsandbehavior.Theinformationtheygatherwillhelptodevelopthewidestpossiblespaceforelephants.
TheAWFishelpingelephantsbyprotectingtheirhabitats.Andtheyalsoworkwithlocalfarmerstoimprovetheirlifeinordertoencouragethemtoprotectratherthandestroyelephants.
5.Thefirstparagraphofthetextismainlytotellreaders________.
A.Africanelephantsareendangerednow
B.thereremainsalottodotoprotectAfricanelephants
C.Africanelephantsarepopularanimals
D.thenumberofAfricanelephantshasincreasedovertheyears
6.WhatisthebiggestdifficultyinprotectingAfricanelephantsnow?
A.Theyarestillbeingkilled.
B.Theirhabitatsarebeingdestroyed.
C.Theydon'thaveenoughfood.
D.Theycan'tliveinpeacewithfarmers.
7.Toprotectelephants,theAWFdoesallthefollowingEXCEPT________.
A.keepingelephants
B.protectingelephants'habitats
C.doingresearchonelephants
D.helpingfarmersimprovetheirlife
8.Whatisthebesttitleforthetext?
A.Africanelephantsconservation
B.LivingwithAfricanelephants
C.Africanelephants'situation
D.Africanelephantsbeingendangered
C
Plasticsludge(污泥)andgarbageisadisasterfortheworld'soceans.Afilmcrewtraveledtheglobetodocumenttherubbish.AndJulieAndersenofthePlasticOceansFoundationsayswhatweseeisjustthetipoftheproblem.“Halfofthewasteactuallysinkstothebottom,andthatremainsonthesurfaceactuallybreaksdown.”
Thefilmmakersfoundrubbishinoceangyres,thecirculatingcurrentsthattraplargeconcentrationsofpollutionintheAtlantic,Indian,andPacificOceans,homeofwhatsomehaveplastic.“Whatwefoundwasaplasticsmogthatspreadthroughoutallthewater.Andinsomepartsoftheoceans,scientistshavefoundmoreplasticthanplant.”
Thepiecesoftheplasticgarbageinfectthefoodchain,sometimesvisibly,andmoresoatthemicroscopiclevel,wheretheplasticparticlesinteractwithotherpollutants.“Thereareheavymetals,medicines,industrialwasteinthesea,whiletheyactslikemagnets(磁铁).Thesepoisonoussubstancesabsorbontheplastic,andthenwhenseafoodabsorbstheplastics,thosepoisonoussubstancesenterthefattytissues.”Tobeconsumedbyothersealifeandbypeopleatlast.
China,Indonesia,thePhilippines,ThailandandVietnamaretheworstplasticpolluters.TheUnitedStates,althoughaleaderinrecycling,isoneoftheworld's20sinceitproducesandconsumessomuchplastic.Thereareeffortsaroundtheworldtoaddresstheproblem,includingatthisnewlyopenedrecyclingcenterinLebanon(黎巴嫩).ButAndersensaysthereismorethatpeoplecando.“Cutbackonsingleuseplastics,straws,plasticcups,plasticwaterbottles,plasticbagsandfindalternativeslikereusablematerials.”Shesayshealthyoceansareessentialtooursurvival.
9.Whatcanwelearnfromthepassage?
A.There'sallislandfullofplasticrubbishinthePacific.
B.Thebadeffectofplasticpollutioncan'tbeseenbyeyes.
C.TheUnitedStatesistheleastplasticpolluters.
D.Theplasticpollutiontooceansismoreseriousthanwhatwecansee.
10.Whatdoestheunderlinedword“they”refertoinParagraph3?
A.Pollutantslikeheavymetalsandmedicines.
B.Theplasticparticles.
C.Seafood.
D.Fattytissues.
11.Whatcanbeinferredfromthelastparagraph?
A.AllAsiancountrieshavethemostseriousproblemofplasticpollution.
B.Theplasticproblemhasn'tattractedtheworld'sattention.
C.Andersenisnotsatisfiedwithwhathasbeendonetosolvetheplasticproblem.
D.Peopleshouldstopusingplasticproductsimmediately.
D
Sharkshavebeenswimmingintheoceanformillionsofyears.TheywereonEarthevenbeforedinosaurs!
Atthetopoftheworld'socean'sfoodchain,sharkshelpkeepthepopulationofotheroceananimalsinbalance.Alargedropinthenumberofsharkscancauseseriousproblemsforalloceananimals.Savingsharksmakessense!
Manypeopleareafraidofsharks.Butmostsharksareharmless.Onlyasmallpercentageofsharksareknowntoattackhumans.Itadapt(适应)welltonewhabitatsandeatwhateverisavailable.However,today,sharksareintrouble.Nearlyone-thirdofthe400sharkspeciesareindangerofextinction,largelyduetoover-fishing.Eachyear,tensofmillionsofsharksarecaughtandkilledjustfortheirfins.Thefinsareusedtomakesharkfinsoup.
HumaneSocietyInternational(HSI)joinedwiththeJaneGoodallInstitute'sRootsandShootsprogramandBeijingZootoprotectsharks.Anexhibitatthezoo,“thePriceBehindtheTaste—ProtectSharks.Don'tEatSharkFins”,wasdesignedtotellpeoplethatsharkfinningiscruelandunnecessary.It'shopedthattheactivitywillhelpputanendtothe_practice.
SharkfinsoupisalsoeatenintheUnitedStates.Infact,thenumbersofsomesharkspeciesinUSwatershavedropped90percentinthelast30years.Toslowthefall,lawsagainstthesaleofsharkfinshavebeenpassedinseveralstates,includingHawaii,Oregon,Washington,andCalifornia.
12.Whatdoesthefirstparagraphmainlytellus?
A.Oceananimalsareatthetopofthefoodchain.
B.Sharksplayanimportantroleintheocean.
C.Sharksareanoldspeciesintheocean.
D.Sharksarebeingcaughtandkilled.
13.AccordingtoParagraph2,sharksareintroublebecause________.
A.theyoftenattackhumans
B.theirfoodisbeingpolluted
C.theyarebeingcaughtforfood
D.theirhabitatisbeingdestroyed
14.Theunderlinedpart“thepractice”inParagraph3refersto________.
A.sharkfinningB.sharkprotection
C.theprogramofHISD.theexhibitatBeijingZoo
15.Whatdoweknowfromthetext?
A.The
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