Unit 2 Wildlife Protection单元复习（同步练习）-高中英语人教版（2019）必修第二册含答案

单元复习（同步练习）-高中英语人教版（）Unit2Wildlife Protection2019必修第二册学校姓名班级考号

一、阅读理解（幼兽）On aday inArkansas,some fishermensaw abear cubin atree.As hourswent by,its（生物学家）mother didntreturn.So theycalled wildlifebiologist Eastridge.The bearcub wassick andhungry,weighing only5pounds andwith his eyes notcompletelyopen.Eastridge calledLisa Stewart,who worksat AppalachianBear Rescuein Tennessee.Stewartalways makesroom for a newcub.She namedthe bearMiracle becauseshe thoughtit was a miraclethat hehad survived!Assoon asshe could,she stoppedhaving contact with the cub sohe wouldnot become too usedtohumans.When thecub arrived,Stewart cleanedhiseyesand puthim ina housealone.SinceMiracle wasalready5months old.Stewart gave him bowlsof foodand anotherbowl of a special（酉己方奶粉），formula similarto abear mothersmilk.Sometimes,Miracle wouldreach hisheadout ofhis houseand takesome formulaor food.But hewasnt eatingtoo much.Miracle was too weak to bewith other bears.So Stewartgavehima toybear namedBuddy.（稻草）.He tookit intohis houseand coveredit withstraw Hefed Buddy,too.Stewart oftenfoundthe toycovered informula andberries and its earsfull ofapple chunks.Now thatMiracle hadBuddy,he cameout ofhis housemore oftenand wanted to eat.After twomonths,Stewart introducedMiracle tootherbearsso they could learnfrom oneanother.She avoidedany directcontactwithMiracle and the otherbears.Stewart wantedto makesurethey stayedafraid ofhumans sotheycouldgo back into the wild again.She alwayshid behind（栅栏）a fenceand threwfood over the topsecretly.The bearshunted forthis foodas they wouldsoon doin thewild.Five monthslater,Rick Eastridgereturned topick upa healthy90-pound Miracleand anotherbearfrom Arkansasnamed Rocky.Eastridge loadedthe bearsinto boxeson histruck andtransportedthem back to thewild.As soonas thebear boxeswere opened,the twocubs ranfor thewoods—where theybelonged.、1What didStewart doshortly afterthecubarrivedA.She helpedhim eatfood.B.She contactedwith him.C.She settledhim down.D.She namedhim Miracle.、2A toybear wasgiven to Miracle inorder to.A.remind himnot towaste hisfood B.kill hislonely timein hishouse.C.develop hisskills ofmakingfriends D.rid Miracleof itsfear ofhumans、3Why didStewart alwaysgive foodtoMiraclein secretA.Because hecould learnhow to find foodin thewild.B.Because hewas tooweakto be frightenedby humans.C.Because agood relationshipcould bedeveloped.D.Because shedidnt wantto disturbhis peacefullife.（猎物繁殖和保护区的管理员）George wasa gamewarden inKenya.One day,he foundthreetiny lionsbeside adead lioness.They wereso littlethat theireyes hadnot yetopened.Sadly,hetook thethree littlelions anddrove backhome.When Georgegot outof thecar with the babylions,his wifeJoy Adamsonimmediately tookover.Joy hadcared formany younganimals over the years,but she had nevertried toraise babylions!However,she wasdetermined tosave thesebabies.The lionsgrew rapidly.But as the liongrew biggerand stronger,Joy and George realizedtheycould notkeep threelarge lions.They decidedto presenttwo of the lionsto a zoo;theywouldkeepthe smallestlion,which theynamed Elsa.Joy andGeorge taughtElsa tohunt andto protectherself.Elsa likedto playwith herhumanfriends,but asElsa grewto heradult size,this playbecame dangerous.More thanonce,Elsa（抓伤）knocked Joyto the ground,scratching her.Joy andGeorge bothrealized thatit wastime tofindElsa anew home.They knewshe neededa wildhome whereshe couldlive thelife shewasborn tolead.Finally,Joy andGeorge decidedto setElsa freein MeruPark at the footof Mt.Kenya.Elsa neverforgot Joy andGeorge.Whenever theycamped nearby,Elsa wouldcometovisit,rubbing herhead againsttheir legsin greeting.Joy missedElsa,but washappy thatshehadmade asuccessful lifeasawild lion.Joy wroteabook aboutElsa,Born Free,which becamean internationalbestseller.Joy traveledall overtheworld,talking about the importanceof savingthewild animals of the world.Joy livedout herlife inAfrica,working withwild animals.She wrotemore booksabout her（激发）experiences.Her heartfelt interestin animalsand hergreat lovefor Elsahelped inspireaworldwide movementto protectwildlife.For Joy Adamson,there was no greatergift thanthebeauty andspirit ofwildanimals,living free.、4When Georgetook thethree lionshome,his wife.A.advised himto givethem to azooB.was frightenedby theirappearancesC.was unwillingto carefor themD.had agreat lovefor them、5JoyandGeorge setElsa freebecause.A.Elsa scratchedJoy B.there wasntenough foodfbr ElsaC.Elsa wasbig and strong D.Elsa wasa dangerto theirneighbors、6What dowe knowaboutthebook Born Free from the textA.It becamevery popular.B.It ismainly aboutJoys experiencesin MeruPark.C.It focuseson wildanimals inKenya.D.It helpedchange peoplesattitudes towardswildlife.

7、What9sthebest titlefbr thetextA.JoyAdamson:living withlions B.Elsa:lion raisedby ahumanC.BornFree:a wonderfulbook D.George:a gamewarden（生态系统）How doesan ecosystem workWhat makesthe populations of differentspeciesthe waythey areWhy arethere somany fliesand sofew wolvesTo findan answer,scientistshave builtmathematical modelsof food webs,noting whoeats whomand howmuch eachone eats.With suchmodels,scientists havefound outsome keyprinciples operatingin food webs.Mostfood webs,for instance,consist ofmany weak links ratherthan afew strongones.When a predator（掠食动物）（猎物），always eatshuge numbersofasingle preythe two species arestrongly linked;when apredator liveson variousspecies,they areweakly linked.Food websmay bedominated bymanyweaklinksbecause thatarrangement ismore stableoverthelong term.If apredator caneatseveral species,it cansurvive theextinction ofone ofthem.And ifapredatorcan moveon toanother species thatis easiertofindwhen aprey speciesbecomes rare,the switchallows theoriginalprey torecover.The weaklinks maythus keepspecies fromdriving oneanother toextinction.Mathematical modelshave alsorevealed thatfood websmay beunstable,where smallchangesof top predators canlead tobig effectsthroughout entireecosystems.In the1960s,scientists proposedthat predatorsat thetop ofa foodweb hada surprisingamount ofcontrol overthesize ofpopulationsof other species-including species they didnot directly attack.And unplannedhuman activitieshave provedthe ideaof top-down controlby toppredators tobetrue.In theocean,we fishedfor toppredators suchas codon anindustrial scale,while onland,we killedoff largepredators suchas wolves.These actionshave greatlyaffected theecologicalbalance.Scientists havebuilt an early-warning systembased onmathematical models.Ideally,thesystem wouldtell uswhen toadapt humanactivities that are pushingan ecosystemtoward abreakdownor wouldeven allowus topull anecosystem backfromtheborderline.Prevention iskey,（临界点）,scientists saybecause onceecosystems passtheir tippingpoint itis remarkablydifficultfor them to return.、8What havescientists discoveredwiththehelp ofmathematical modelsof foodwebsA.The livinghabits ofspecies infoodwebs.B.The rulesgoverning foodwebs ofthe ecosystems.C.The approachesto studyingthe speciesin theecosystems.D.The differencesbetween weakandstronglinks infoodwebs.、9A stronglink isfound betweentwospecieswhen apredator.A.has awide foodchoice B.can easilyfind newpreyC.sticks toone preyspecies D.can quicklymove toanother place、10What willhappen ifthe populationsof toppredators ina foodweb greatlydeclineA.The preyspeciestheydirectlyattack will dieout.B.The speciesthey indirectlyattackwillturn intotoppredators.C.The livingenvironment ofotherspecies will remainunchanged.D.The populationsofotherspecieswillexperience unexpectedchanges.、11How doesanearly-warning systemhelp usmaintain theecological balanceA.By gettingillegal practicesunder control.B.By stoppingus fromkilling largepredators.C.By signalingthe urgentneed fortaking preventiveaction.D.By bringingthe broken-down ecosystemsbacktonormal.More andmore birdsare flyingto settlein Qinghai Lake,one ofthe highestinland lakesin China,thanks to the protectionefforts ofthe localgovernment.Covering anarea ofover4,000squarekilometers,Qinghai Lakeis alsothe countrysbiggest salt lake.Located inQinghai Provinceof NorthwestChina,the lakeis famousfor thetwo islandsat itsnorthwestpoint—Cormorant Islandand EggIsland.The twoislands haveplenty offloating grassand various fish,offering richfood sourcesto birds.The islandshave become a paradisefordifferent kinds of groupsof birdsand havebeen calledBird Islands.（高原）Each Marchand April,when iceand snowcovering theQinghai-Tibet Plateaustart tomelt,over20kinds of birds flyto theBird Islandsto layeggs.During themonths,flocks ofbirdscover the whole sky overthe islands andbird eggscan befound everywhere.Visitors canhear thesingingofbirds from milesaway.These havebecomeaworld-famous symbolofthelake.To protectthis paradisefor birdsand supportcalls forecological protection,China setup theQinghaiLake NationalNatural Reserveattheend of

1997.Meanwhile,the Statehas pointedoutthat theBird Islandsand SpringBay ofQinghaiLakewere centralreserves.（巡逻）Inspectors andconservators oftenpatrol thelake,enriching localresidents*knowledgeof relatedlaws andspreading knowledgeabout animalprotection tovisitors.They aremaking greateffortsto callon peopleto loveand protectthe birds.At the same time,they havebuilt specialfencesaround theisland areato preventwolves,foxes andother carnivorousanimals,as wellas（繁殖）.illegal huntersfrom breakingup the birds*building nests,laying eggsand breedingAs aresult,more andmore birdsare comingto theislands forsheltering andbreeding.、12Why aremore andmore birdscoining tothe biggestsaltlakein NorthwestChinaA.Because itis gettingwarmer andwarmer.B.Because itis beingreformed.C.Because theenvironment isgetting moreagreeable tothemtolive in.D.Because thepeople thereare becomingricher andricher.、13What dothebirdsfeed onA.Floating fishandvariousgrass.B.Grass growingin thewater anddifferent kindsoffish.C.Salt waterand plentyof grains.D.Corn fromthe localfarmers.、14According tothe passage,we caninfer that.A.over20kindsofbirds cometotheBird Islandsbefore MarchB.flocks ofbirds flyup tothewholeskyovertheislandsto layeggsC.visitors cansee thebirdsfrommiles awayD.the governmenthas takenmany measuresto protectthe district、15This passageis mostprobably takenfrom.A.a newspaperB.a documentC.a storybookD.a sciencebook

二、七选

五、（蚊子）16Where DoMosquitoes Goin Winter

①Why domosquitoes,everywhere inwarmer months,disappear completelyin winterMosquitoesare cold-blooded insects,meaning thatthey dontlike the cold andprefer temperatures（华氏温度）thatare80degrees Fahrenheitor more.When thetemperature drops,they actuallylosetheir abilityto flyand becomemotionless.

②They wouldnever beable tofly farenough.The actualanswer tothe questionis differentformale andfemale mosquitoes.Male mosquitoesThey die.But thatsnot justbecause ofthecold.（寿命）Male mosquitoeshave farshorter lifespansthan females,and theydie inautumn.（冬眠）.Female mosquitoes,though,can livethrough thewinter.They hibernateIn autumn,（）the femaleswill gointo hollowlogs orcracks in thegroundand enterthis stillstate.3They putofftheir development,typically formonths.When itwarms upagain,the femaleswill comeout fromhibernation.At thispoint,theyregetting ready to laytheir eggsand theyneed asmuch bloodas possibleto helpthe eggsdevelop.The femalesmust finda bloodmeal toprovide theprotein neededby theireggs todevelop,just inthetime,when humansare outdoorsin shortsleeves enjoyingthe warmingweather.®It actuallydoesnt havetobewhat wehumans wouldconsider cold”to puta mosquitoindanger.While thesepests liveactively whenits around80degrees F,most speciescan start（）heading intohibernation whenit dropsto around

50.5This iswhen female mosquitoes startlookingforaplace forsleep.A.The obviousanswer isthat itscold.B.Now itstime formalemosquitoesto wakeup.C.Its onlythe femalemosquitoes thatare bitingyou.D.Unlike birds,mosquitoes dontfly southfor thewinter.E.Anything below50degrees isalready toocold formost mosquitoes.F.They carryon withlife onlywhen thereis enoughwater fortheir needs.G.They canhibernate forup tosix monthsin freezingor waterlessconditions.

三、完形填空（空）15Growing upinthe USA,I alwayswantedtoexperience anotherculture.The1came whenIwas

15.After afew monthsof planningand2,I wasreadytospend thesecond semesterof myfirsthigh school year3an exchangestudent in Australia.4in Perthwas oneofthemost excitingmoments ofmy life.I realizedthen thattherewasnoturning back.The familyI wouldlive withwas waitingfor me,anditwouldonly befive days5the new schoolyear.The schoolI attendedwas6my schoolbackinthe States.I wasquite7at first,especially neverhaving beentoanewschool—even intheUS.Everythingwent without8,though.The teacherswere welcomingandthestudents werefriendly.The most9time wastravelling withother exchangestudents aroundAustralia duringoursemester break.The fewweeks we10together werefull ofamazing activities.At theend ofour11inAustralia,we hadthree weeksto shareour storiesand helpeach otherdealwith leaving.It was12that ourlast daytogether wasfilled withtears.We packedour camp,13e-mail addressesand gatheredtogether fora finalgood-bye.Upon cominghome,an openmind wasagain important.Resettling hometook timeand

14.but atlast Imade it.All thewhile,I wasthoughtful toletting myfamily andfriends knowhowhappy Iwastobe homeand howmuch Ihad missedthem—though theexperience isstill15with me.So,if youhave theopportunity tostudy abroadyou mostcertainlyshould.B.natural17A.task B.wrote C.chance18A.packing B.money C.performing

19、A.as D.vacation C.for、D.preparing C.Working20A.FlyingD.with C.after21A.sinceD.Studying C.as goodas22A.similar toD.before C.worried、23A.excitedD.thesameC.difficulties、24A.hopeasC.comfortable、25A.valuableD.confusedC.studied、26A.spentD.argumentC.trip、27A.stayD.unforgettableC.strange、28A.funny D.workedC.shared、D.holidays29A.madeC.ability、30短文A.sadly B.clearly C.lively D.amazinglyA.填空阅读下面短文，在空白处填入个适当的单词或括号内单词的正确形式1effort D.simple

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四、D.exchangedB.dreamD.wisdomB.convincingB.onB.LandingB.untilB.different fromB.annoyedB.doubtB.acceptableB.livedB.visit。