2026版创新设计高考总复习英语(外研版)课时作业-Unit 5A delicate world

Unit5AdelicateworldⅠ.阅读理解Whenheflaggedmedown,Ithoughthewasaneldercollectinga“customsfee”,thefewdollarsitcoststousevillageroadsthatleadtomanyofSamoa’ssights.He’dbeensittinglazilyinagreyingroadsideshack(棚屋)builtforsuchoccasions.NormallyIwouldn’tpickupafreerider.ButItriedtoliveoutadream.I’dwantedtogotoPulemeleiMoundsinceI’dhearditmentionedinanarchaeologyclassyearsago.The“mound”isactuallyapyramid40feethighandroughly200feetacrossatitsbase.So,Iasked,“DoyouknowhowtogettoPulemeleiMound?”“Mmm,”hesaid,raisinghiseyebrowsintheclassicPolynesiangesturefor“yes”.“Ineedtopickupmycaratthemechanic’sbutnohurry,I’lltakeyoutherefirstifyouwant.”You’dthinkthatagiantpyramidwouldbeamajorsight,oratleastsomethingmanypeoplehadheardof,butitwasn’t.Myaccidentalfriend’sraiseoftheeyebrowswasthemostpromisingprospectI’dhadinaweek.Wedrovealongtheroadinsilenceforafewminutes.Thenmynewfriendbrokethesilenceand,meanwhile,myhopes.“I’veneverbeentoPulemelei,”hesaid.“I’velivedherebutIneverthoughtofgoing.”Myheartsank.Butwepressedon,crossingastream,walkingthroughwaist-highgrass,andthenanothermileofhotwalkuntilwefoundasign.There,barelyvisible,werethewords:“PulemeleiMound150m”.Thesignmarkedadarktunnelofjungle.Thenthepathopenedtoraysofsunshine.Weclimbed.Andthen,amagicalthinghappened.WewerestandingontopofaPolynesianpyramid.Justthen,myfriend,obviouslyawedbywhathesaw,turnedtowardme,andplacedhisbigSamoanhandsonmyshoulders.Inthemostnaturalway,hebentdownandkissedmegentlyonthecheek.“Thankyou,”hesaid.1.What’sthepurposeoftheSamoanmanflaggingtheauthordown?A.Tothumbaride.B.Toaskfordirections.C.Tocollectacustomsfee.D.Towarnofaroadaccident.2.Whichofthefollowingwordscanbestdescribetheauthor?A.Informedbutrigid.B.Hesitantbutagreeable.C.Skepticalandreserved.D.Curiousandadventurous.3.WhydidtheSamoanmanthanktheauthorintheend?A.Hehadlivedouthisdream.B.Hewastakentothemechanic’s.C.Heenjoyedtheauthor’scompany.D.Heexperiencedthethrillofdiscovery.4.Whatisthepassagemainlyabout?A.APolynesianvillage.B.AfamousSamoansight.C.Achanceencounter.D.Anelderprotectinglocalroads.HighintheSwissAlpsandtheArctic,scientistshavediscoveredmicrobes(微生物)thatcandigestplastics—importantly,withouttheneedtoapplyextraheat.Theirfindings,publishedinthejournalFrontiersinMicrobiology,couldonedayimproveplasticrecycling.It’snosecretthatplasticpollutionisstillabig,globalissue.SinceitsproductionexplodedduringandafterWorldWarⅡ,humanshavecreatedmorethan9.1billiontonsofplastics—andresearchersestimatethatlessthanonetenthoftheresultingwastehasbeenrecycled.Tomakemattersworse,themostcommonrecyclingoption—whenplasticiswashed,processedandturnedintonewproducts—doesn’tactuallyreducewaste:Therecycledmaterialsareoftenoflowerqualityandmightlaterendupinalandfillallthesame.So,researchersarelookingforsolutionstotheplasticproblemthatgobeyondconventionalrecycling—andoneprocessthey’veexperimentedwithisbreakingdownplasticsusingmicrobes.Buttheknownplastic-digestingmicrobescanonlydosoatwarmtemperaturesabove85degreesFahrenheit.Whendoneatanindustrialscale,theamountofenergyneededtogeneratethatmuchheatmakestheprocessgiveoffmorecarbon—andcostmoremoney.ButthemicrobesfoundintheSwissAlpsandtheArcticcanfunctionatcoolertemperatures:Theywereabletobreakdownbiodegradable(可生物降解的)plasticsat59degreesFahrenheit.Inthenewstudy,co-authorJoelRüthiandhiscolleaguesdiscoveredthatofthetotal34typesofmicrobesexamined,19weresuccessfullyabletobreakdownaformofplasticcalledpolyester-polyurethane,and17couldbreakdowntwotypesofbiodegradableplasticmixtures.“Unfortunately,theplasticsthatthemicrobespartiallydegradedrepresentareallysmallamountofplasticsincirculation,”saidGavinLear,anenvironmentalmicrobiologist,whowasnotinvolvedinthestudy.Learacknowledgedthatusingnaturalmicrobescouldprovideaheadstartwhenitcametodesigningastrategyforbio-recycling.“Ifwemoveawayfromtheconventionalnon-biodegradablematerials,andwestarttousemoreofthesebiodegradableplastics,thenit’sgoodthatweknowhowtodegradethemmorequicklysothey’relessofanenvironmentalproblem,”heconcluded.

5.Whatdoweknowabouttheconventionalrecycling?A.Itdoesnotliveuptoexpectations.B.Itcontributestomorewaste.C.Itisnotaspopularasbefore.D.Itensuresnewproductquality.6.Whichbestdescribesthemethodofusingthemicrobesinthepreviousstudies?A.Impractical. B.Pioneering.C.Reliable. D.Invaluable.7.WhyisthenewstudymentionedinParagraph4?A.Toprovethemicrobeshaveanobvioustastepreference.B.Toshowthefindingopensdoorstoamoreefficientsystem.C.Toclarifyhowtheprocessofbreakingdownplasticsworks.D.Toexplainwhybio-recyclingisbetterthanconventionalrecycling.8.Whatdotheunderlinedwords“headstart”inParagraph5mean?A.Reward. B.Criterion.C.Protection. D.Advantage.Ⅱ.完形填空Dreamingofphotographingtheworld’sbeauty,Iwroteatravelwishlistandhungitonmywall,notexpectingtoactuallygoanywhere.However,alocalphotocontestgavemea1.IchosetheGrandCanyon,oneofmybucketlistplacestovisit,sinceIgotmyfirstcamera.

Thejourneywas2,withuniquetoucheslikeaspentreestoweringandlizards(蜥蜴)rushingabout.Afteraday’s3,Idecidedtohaveagoodrestandstartfreshthenextdayforthemissionto4theCanyon’sgrandeur.

Thenextmorning,Iwokeupearlytocapture(拍摄)the5.Reachingtheoverlook,Ifoundanelderlymanaloneonabench.Afterexchanging6,henoticedmycameraand7ifI’dcapturedanyfavorites.I8sharedacoupleofphotos,notanticipatinganyfurtherconversationthatfollowed.He9,revealingthatheandhislatewife,Betty,visitedtheGrandCanyonannuallyfortheiranniversary.Her10thepreviousyearmarkedhisfirstreturnwithoutherandhespenteachsunrisereflectingontheirtreasured11.Hisheartfelttales12medeeply,asI,too,hadexperiencedarecentloss,makingthemoment13.

Returninghomewithnumerousphotos,I14thebestfrommyadventuresforthecontest.Thisjourneytaughtmethevalueofchasingdreams,embracingchallenges,and15withothersthroughsharedmoments,makingitatrulyenrichingexperience.

1.A.favor B.breakC.suggestion D.push2.A.tiring B.puzzlingC.refreshing D.encouraging3.A.traveling B.meetingC.talking D.picnicking4.A.shoot B.paintC.describe D.video5.A.trees B.sunriseC.lizards D.birds6.A.gifts B.ideasC.numbers D.greetings7.A.doubted B.inquiredC.considered D.checked8.A.elegantly B.purposefullyC.hesitantly D.gratefully9.A.openedup B.dressedupC.hurriedup D.cheeredup10.A.runningaway B.passingawayC.breakingdown D.settlingdown11.A.possessions B.collectionsC.memories D.qualities12.A.entertained B.inspiredC.concerned D.touched13.A.available B.comfortableC.admirable D.unforgettable14.A.purchased B.guaranteedC.selected D.made15.A.competing B.connectingC.discussing D.cooperatingⅢ.语法填空ChinesescientistshavestartedascientificexpeditiontotheMountQomolangma.1.totalof170scientistshavebeguntodoresearchonwater,ecologyandhumanactivity,aiming2.(reveal)themechanismofenvironmentalchangeandoptimizetheecologicalsecuritybarriersystemontheQinghai-TibetPlateau.

3.(label)astheroofoftheworldandwatertowerofAsia,theQinghai-TibetPlateauisanessentialecologicalsecuritybarrierinChina.Itisalsoanaturallaboratoryfor4.(conduct)researchontheevolutionofEarthandlife,andtherelationshipbetweenmanandEarth.5.animportantpartoftheresearch,theongoingexpeditionis6.(particular)importanttothestudyoftheimpactofclimaticandenvironmentalchangesintheMountQomolangmaregiononotherpartsoftheworld.

Theexpeditionfocusesonmajorscientific7.(issue),suchashowtheextremehigh-altitudeenvironmentoftheMountQomolangmachangesundertheinfluenceofglobalwarming,accordingtoYaoTandong,8.istheteamleader.“Theexpeditionhasrealizedthe9.(transform)from‘Iwanttoconqueryou’to‘Iwanttounderstandyou’,achievedtheapplicationofnewtechnologiesandresultedinimportantinternationalinfluence,