2023学年重庆市綦江区南州中学高三3月份模拟考试英语试题（含解析）

2023学年高考英语模拟测试卷注意事项：1．答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。2．回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦干净后，再选涂其它答案标号。回答非选择题时，将答案写在答题卡上，写在本试卷上无效。3．考试结束后，将本试卷和答题卡一并交回。第一部分（共20小题，每小题1.5分，满分30分）1．Theywenttothestreetto________tothewholecitytohelpthepoorboy.A．apply B．appealC．add D．reply2．ThankstoChinesepeople’shardworkandwisdom,Chinahas_____intothesecondlargesteconomy.A．evolved B．slipped C．extended D．shaped3．Youwillhavetostayathomeallday______youfinishallyourhomework.A．if B．unless C．whether D．because4．Takingonlinereadingintoconsideration,wecanchallengetheassumption____readingforpleasurecontinuestodecrease.A．whether B．that C．where D．when5．Mostgraduatesinbigcitiesaresufferingformconnectedtosoaringhousepricesandjobhunting.A．curiosity B．eagerness C．thirst D．anxiety6．––Cathyisnotcomingtoyourbirthdaypartytonight.––Butshe______!A．promisedB．promisesC．willpromiseD．hadpromised7．Don’tthrowawaytheoldbooks．Givethemto____needsthem．A．whoever B．anyone C．who D．whomever8．—Whatgreatchangeshavetakenplaceinourcityinthelastfewyears!—Indeed,manyhighbuildingshave_______alloverthecity.A．woundup B．sprungup C．heldup D．madeup9．_____isoftenthecase,wehaveworkedouttheproductionplan.A．WhichB．WhenC．WhatD．As10．I______footballsinceIleftuniversity.A．didn’tplay B．don’tplayC．won’tplay D．haven’tplayed11．Wemostprefertosayyestothe______ofsomeoneweknowandlike.A．attempts B．requestsC．doubts D．promises12．Whydoyouwantanewjob______you’vegotsuchagoodonealready?A．that B．whereC．which D．when13．---Thankyouforremindingmeofthetime,orIlatefortheflightyesterday.---Don’tmentionit.A．willhavebeen B．wouldhavebeenC．mustbe D．couldbe14．Whichdoyouprefer,teaorcoffee?—_______.Ireallydon’tmind.A．Both B．None C．Neither D．Either15．WithWeChatPaycomingintowidespreaduse,ourhouseholdbillsareconvenient____.A．paying B．paid C．topay D．tobepaid16．—WherewasI?—You________youdidn’tlikeyourjob.A．hadsaidB．saidC．weresayingD．hassaid17．Itsagoodideatogetstudentstoretellastorytheirownwords．A．of B．in C．by D．through18．—Whatdidhedoinreturnforfree________andfoodofferedbythekindcouple?—Hehelpedtheirsonwithhislessons.A．conservation B．admissionC．accommodation D．immigration19．Lastsummerwesawaverygoodfilm,____wasabouttheAnti-Japanesewar.A．whichB．whenC．thatD．where20．I________________afluwhenIwasonaspringoutingwithmyclassmate.A．caughtup B．pickedupC．tookup D．broughtup第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21．（6分）Createdin1998byCaseyandShelleyBlack，theNorthernLightsWildlifeWolfCenterfocusesonnotonlyrescuingyoungabandonedwolvesbuteducatingthepublic．Unlikeothercenters，youcanactuallywalkwiththewolvesandhaveexciting，hands﹣oninteractionwiththemhere．Andso，wegatheredonelatewintermorningtolearn，prepareandwalk．ScrappyandFlora，ourwolvesthatday，werebroughttothecenterwhenonlyafewdaysold．"Theylivedinthehousewithusforthefirstseveralmonths．Wetreatedthemlikehumanbabies，fedthemandsleptwiththem，"saidShelley．So，theyaretotallyusedtopeople．However，thesearewildanimals．Forthatreason，ShelleyandCaseyexplained，thewalkistotallyonthewolf'sterms．"Wedon'tapproachthem，butiftheycomeuptous，wecantouchthem．"Withallthisinmind，weheadedforthewoods．Wewerewalkingonaloggingroadwhensuddenly，Flora，all60poundsofher，hurrieduptomeandraiseduponherlegs．Shewasalmostastallasme．Assheleanedin，putherhugemuddypawsonmyshouldersandsniffedmyface，apparentlyshewassayinghelloinwolftalk．Wewalkedfarther，maybehalfamile，whileScrappyandFloradashedinandoutofthewoodsstoppingtooccasionallyrollinthesnow，digforthisorthatandjustplay．Thenweallheadedintothetreestoapicturesquestreamwherethewolvessplashed，drankandhadagreattime．Onecouldpointoutthatthiswholeadventurewasstagedandquiteartificial．Butthepurpose，CaseyandShelleysaid，istoexplainthewolves'placeintheenvironmentand，primarily，toletpeopleknowwolvesdon'thavetobeuniversallyfeared﹣theyreallydon'thidesecretlyinthewoodsjustwaitingtoeatpeople，butthey'dratheravoidpeople，forthemostpart．1、HowistheNorthernLightsWildlifeWolfCenterdifferentfromothers？A．Ittrainsandeducateswildwolves．B．Itaimstorescueyoungabandonedwolves．C．Itraiseswolvesforcommercialpurposes．D．Itallowsvisitorstotakeawalkwithwolves．2、WhatcanbeinferredfromShelleyandCasey'sexplanationinParagraph2？A．Thewalkcanbepotentiallydangerous．B．Thewolveshavelostalltheirwildness．C．Peopleshouldgetclosetothewolvesactively．D．Thewolvescanreadpeople'smindlikehumanbabies．3、WhydidFlorabehavelikethatwhenshesawtheauthorontheloggingroad？A．Toexpresscuriosity．B．Toshowfriendliness．C．Toattractattention．D．Toseekcompanionship．4、WhydoCaseyandShelleyorganizesuchanadventure？A．Toadvertisethecenter．B．Topublicizewolfhunting．C．Topromoteenvironmentalprotection．D．Toclarifysomeconventionalviewsofwolves．22．（8分）Whensomethinggoeswrong,itcanbeverysatisfyingtosay,“Well,it’sso-and-so’sfault.”or“IknowPmlate,butit’snotmyfault;thecarbrokedown.”Itisprobablynotyourfault,butonceyouformthehabitofblamingsomebodyorsomethingelseforabadsituation,youarealoser.Youhavenopowerandcoulddonothingthathelpschangethesituation.However,youcanhavegreatpoweroverwhathappenstoyouifyoustopfocusingonwhomtoblameandstartfocusingonhowtoremedythesituation.Thisisthewinner’skeytosuccess.Winnersaregreatatovercomingproblems.Forexample,ifyouwerelatebecauseyourcarbrokedown,maybeyouneedtohaveyourcarexaminedmoreregularly.Or,youmightstarttocarryalongwithyoutheusefulphonenumbers,soyoucouldcallforhelpwheninneed.Foranotherexample,ifyourcolleaguecausesyouproblemsonthejobforlackofresponsibilityorability,findwaysofdealingwithhisirresponsibilityorinabilityratherthansimplyblametheperson.Asktoworkwithadifferentperson,ordon’trelyonthisperson.Youshouldacceptthatthepersonisnotreliableandfindcreativewaystoworksuccessfullyregardlessofhowyourcolleaguefailstodohisjobwell.Thisiswhatbeingawinnerisallabout—-creativelyusingyourskillsandtalentssothatyouaresuccessfulnomatterwhathappens.Winnersdon’thavefewerproblemsintheirlives;theyhavejustasmanydifficultsituationstofaceasanybodyelse.Theyarejustbetteratseeingthoseproblemsaschallengesandopportunitiestodeveloptheirowntalents.So,stopfocusingon“whosefaultitis.”Onceyouareconfidentaboutyourpoweroverbadsituations,problemsarejuststeppingstonesforsuccess.1、Accordingtothepassage，winners________.A．dealwithproblemsratherthanblameothersB．meetwithfewerdifficultiesintheirlivesC．haveresponsibleandablecolleaguesD．blamethemselvesratherthanothers2、Theunderlinedword“remedy”inParagraph1isclosestinmeaningto________.A．avoid B．acceptC．improve D．consider3、Whenyourcolleaguebringsaboutaproblem,youshould________.A．findabetterwaytohandletheproblemB．blamehimforhislackofresponsibilityC．tellhimtofindthecauseoftheproblemD．askamoreablecolleagueforhelp4、Whenproblemsoccur,winnerstakethemas________.A．excusesfortheirfailuresB．barrierstogreaterpowerC．challengestotheircolleaguesD．chancesforself-development5、Whichofthefollowingisthebesttitleforthepassage?A．AWinner’sProblem.B．AWinner’sSecret.C．AWinner’sOpportunity.D．AWinner’sAchievement.23．（8分）Askingapatienttohum(哼唱)pianotunesandplayfininstrumentwhileundergoingbrainsurgery(手术)maysoundlikeastrangerequestfromadoctor．However，thatisexactlywhatateamofbrainspecialists，ledbyPilcher，requestedDanFabbiotodo．In2015，thethen25-year-oldmusicianwasdiagnosedwithabraintumor(肿瘤)，whichwaslocatedinthepartofthebrainknowntobeactivewhenpeoplelistentoandmakemusic．“Removingatumorfromthebraincanhavesignificantconsequencesdependingonitslocation，”Pilchersays．“Boththetumorandtheoperationcandamagetissueandaffectcommunicationbetweendifferentpartsofthebrain．”Fabbio，therefore，fearedthesurgerywouldcausehimtolosehismusicalability．Topreventthatfromhappening，Pilcherandhiscolleaguedesignedmanytests，includingaskingFabbiotolistentopianotunesandhumbackduringMRIscans．Thisenabledthephysicianstolocatetheareathatisvitalformusicandlanguageprocessingandcreatea3-DmapofFabbio’sbrain．Despitethegreatstartingpoint，itwasnotaperfectwaytopreventpossibledamagetothe．Theonlywaywastokeepthepatientawakeandaskhimtohumpianotunesduringthesurgerysothatthesurgeonscouldidentifytheareastoavoid．Whilethesurgerywentsmoothly，therealtestcamewhenFabbiowasaskedtoplayasongonhissaxophone．Thetunehadbeensimplifiedtoensurethatitwouldnotrequiretoomuchstrengthandcauseharmtothestitches(缝线)inthebrain．Heplayeditfaultlessly，andwhenhefinished，theentireoperatingroomeruptedinapplause．Theresearcherssaythatayearafterthegroundbreakingsurgery，theyoungmusiciancanonceagainheartunesineverything—evenhiselectrictoothbrush．1、WhatcanweinferfromPilcher’swordsinParagraph2?A．Fabbio’sbrainwasseriouslydamaged．B．Thesurgerywouldbeahugechallenge．C．Fabbio’sbrainpartsfailedtocommunicate．D．Thesurgeryhadtobeperformedimmediately．2、What’sthemajordifficultyinFabbio’ssurgery?A．Tokeephisbrainactive．B．Tohelphimovercomefear．C．Toprotecthismusicalability．D．Toenablehimtoplayaninstrument．3、Whatdoestheunderlinedword“it”inParagraph4referto?A．Creatinga3-DmapofFabbio’sbrain．B．RemovingthetumorfromFabbio’sbrain．C．KeepingFabbioawakeduringthesurgery．D．ListeningtopianotunesduringMRIscans．4、WhywasFabbiorequestedtohumpianotunesduringthesurgery?A．Tosavehisstrength．B．Tocheckthesurgeryresult．C．Tomakethestitchesworkeasier．D．Tolocatethevitalareaformusic．24．（8分）Itismadefromgrapesgrownwithoutpesticides(杀虫剂)andchemicals,iskindtotheenvironmentandrarelycauseshangovers(酒后头痛).SalesoforganicwineareboomingintheUK.AccordingtotheorganicfoodandfarminggroupSoilAssociation,salesoforganicbeers,winesandspiritsroseby14.3%lastyeartoreachnearly£6million,drivenbythedemandfromconsumerswhoareincreasinglyseeking“natural”food.“Itseemsthatpeoplearerediscoveringtheirlinkwiththeenvironmentthroughorganicfood.Organicwinesalsotastebetter,perhapsduetolessuseofman-madechemicals.”saidFinnCottleofSoilAssociation.Aswellasthebenefitsofproducinggrapeswithoutusingpesticides,organicwinealsocontainslesssulphurdioxide(二氧化硫),whichcancontributetowardshangovers.Supermarketsareincreasingsuppliesontheirshelvestomeetconsumerdemand,whiletheswitchtoonlineshoppinghasalsohelped,aspeoplearemoreeasilyabletofindwhattheyarelookingfor.VintageRootsisnowoneoftheUK’sbiggestonlineshopsoforganicwine,whileOcadoprovidesmorethan100differentorganicwinesandDaylesford,best-knownforitsorganicvegetableboxes,hasbranchedoutintoorganicwineandspirits.ThediscountsupermarketAldiissettostartitsfirstcollectionofso-called“green”winesthisweek,offeringeightwineswithorganiccertificates.Aldiexpectsthewinestoappealtotheyoungshopperswhoareincreasinglyconcernedabouttheenvironmentalinfluenceoftheproducethattheyarebuyingandconsuming.EnglishorganicwineproducerOxneyEstate’sNoirRosérecentlywontheWaitroseprizeforthemostoutstandingroséwineatthecompetition.AspokeswomanforWaitrosesaid:“Organicwineisagrowingtrendgloballyandwehaveseensalesincreaseby16%inthelastyear”.1、Salesoforganicwineareincreasingprobablybecause________.A．consumersarenowmoreenvironmentallyawareB．itoffersaverydifferenttastefromtraditionalwineC．consumersaretiredofhangoversafterdrinkingD．itcontainsnosulphurdioxideorpesticide2、What’sthemainideaofparagraph4?A．UKsupermarketswelcomeorganicwineandspirits.B．Onlineshoppingpromotesthesalesoforganicwine.C．There’renotenoughsuppliesoforganicwineintheUK.D．Supermarketsshouldgoonlinetosellmorewine.3、“Waitrose”inthelastparagraphisprobably________.A．awineproducerB．anorganicwineC．awinecompetitionD．anewsagency4、Thewritingpurposeofthetextisto________.A．persuadereaderstogogreenwhiledrinkingB．compareorganicwineandtraditionalwineC．sharewithreaderswineswithouthangoversD．introduceanewconsumingtrendintheUK25．（10分）WhenIarrivedatuniversity,Ihadnothinginmybankaccountbutwasgivenabrandnewoverdraft(透支).I’dneverhadonebefore.Soitwasveryexcitedtospendmoneyonshopping,nightsout,andallthejunkfoodmymumhadneverletmeeat.Imanagedtomaxout(达到最高限度)myaccountwithinthreemonthsandsuddenlylifewasn’tsomuchfun.IspentthelasttwoweeksbeforeEasteronadietofporridgeandbecameself-loathing(自我憎恨的)andIalsoblamedAsda(阿斯达超市)forallthetwo-for-onedealsIcouldn’tresist.NowI’mworkingfull-timetorepaymydebts.I’malsosettingupaseparatebankaccountformystudentloantogointotocoverrentandbills.SoI’llbeabletokeepaneyeonmyspending.WithalotofhardworkandsavingovertheholidaysI’mhopingthatI’llbeinbetterfinancialshapefornextyear.Aftermyexperienceinhalls—beingkeptawakeuntil4a.m.andworksurfacespermanentlycoveredinmind—I’mlookingforwardtomovingintoahousewithfriends.Thepartyingandsociallifeinhallsarefantastic,butsometimesyou’reputwithpeopleyoudon’tgetonwith,andit’shardtocopewiththat.Ithelpedmetostaystrong,butIwishIhadstooduptothemratherthanfeltbullied.Ihadareallybadtimeinmyfirstyear,whichiswhyI’mgoingtomakethemostofuniversitynextyear.I’mgoingtobalanceworkwithasociallife,hitFreshers’weekhardandjoinsomesocieties.Withuniversityhandingmesomanyopportunitiesonaplate,IwanttotakeupasmanyasIcanandenjoymyself.1、Theauthorcoulddosomuchshoppingasafreshmanbecause________.A．shewaspermittedtooverdraftfromthebankB．herparentssenthermoneythroughthebankC．shewantedtomaxoutheraccountD．shecouldworkfull-time2、Whatcanweinferfromthesecondparagraphabouttheauthor?A．Sheenjoyedeatingporridgeforhermeals.B．Shehadtoworktopayforhereducationfee.C．Sheregrettedspendingsomuchmoneyonshopping.D．Shewantedtoborrowmoremoneyforshopping.3、Fromthistextwecanseethattheauthor________.A．gainedalotofmoneythroughworkingB．didn’tgetonwellwithherworkmatesC．feltbulliedbyherfriendsD．workedandsleptinabadcondition4、Theauthormadeuphermindto________nextyear.A．makegooduseofheruniversitylifeB．findabetterjobC．takeupmoreplatesD．formsomeorganizations5、Theauthormainlyintroducesher________inthepassage.A．opportunitiesatfirstyearofuniversityB．freshmanexperiencesatuniversityC．workingexperiencesatuniversityD．thoughtsonherdailySpending第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）Asspringisapproaching,manysuburbandwellersarechoosingrunningasawaytoquicklyloseweight.They1thetrailsofareaparksandforestpreserves,their2formingwhitecloudsbeforethemoncoldmorningsastheyhuffandpuffthroughtheirexercise3.Butisrunningafastsolutionforweightloss?Accordingtothosewho4inexercisephysiologyandnutrition,theanswerisno.5runningiseffectivein6pounds,this7takesplaceovertimeandrequirespatience.“Thatisprobablyoneofthebiggestproblemsthatpeoplehavewhenstartinganyexercise,”saidKevinDavis,afitnessspecialistandtrainer.“Theydon’tseeresults8andsothey9.”“Inordertogetfullhealth10youneedatleast30minuteseach11,”hesaid.Statisticsfromaresearchgroupthatstudiespeoplewhohavesuccessfullylostweightand12theirweightloss,pointtotheneedtoconsistentlyburn2,800caloriesthroughexerciseeachweekinordertosuccessfullyloseweight.13fast,14runs,weightlossatthislevel15longer,slowerruns.Startingweightalso16asubstantialroleinhowmanycaloriesareburnedduringarun.Forexample,a220-poundmanwhogoesforatwo-milerunwillburnabout150calories,whilea120-poundwomanwillonlyburn82.Inordertoloseapound,thebodyneedstoburnabout3,500calories.A180-poundpersonrunningforfivemileseachdaywilllosearoundfivepoundspermonth.17,asrunnersloseweight,theybegintoburn18caloriespermileandweightlossbeginsto19.Put20,itbeginstotakemoretimetolosemoreweight.1、A．squeezeB．enterC．packD．pick2、A．mouthsB．breathC．atmosphereD．glasses3、A．routinesB．clothesC．journeyD．club4、A．specifyB．merchandiseC．realizeD．specialize5、A．IfB．BecauseC．WhileD．When6、A．losingB．gettingC．keepingD．burning7、A．progressB．procedureC．exerciseD．transformation8、A．rightalongB．rightawayC．rightoffD．rightout9、A．quitB．continueC．leaveD．doubt10、A．interestsB．bonusC．benefitsD．allowance11、A．timeB．dayC．weekD．morning12、A．increasedB．reducedC．protectedD．maintained13、A．WouldratherB．OrratherC．RatherthanD．Otherthan14、A．interestingB．exhaustingC．demandingD．exciting15、A．requiresB．acquiresC．inquiresD．requests16、A．hasB．leadsC．needsD．plays17、A．BesidesB．HoweverC．ThereforeD．Furthermore18、A．moreB．lessC．fewerD．faster19、A．pauseB．stopC．sufferD．stabilize20、A．stronglyB．simplyC．clearlyD．heavily第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）China’sTeaVillagesInmostChineseteavillages,Marchisthetimeofyearinwhichlocalsstarttopickandprocesstea.The

1．(usual)quietvillagessuddenlybecomebusycentersofactivity,aspeopletakeoutspecialtoolsandprepare

2．teaprocessing.Insomevillages,localresidentsholdtraditionalceremonies,

3．(thank)heavenforitsblessing.Thepriceoftea

4．(pick)inMarchisextremelyhighbecause

5．isfresh,tenderandcontainsmultipletraceelements.China

6．(be)famousforteaproductionsinceancienttimes.Ofthegoodstransportedandtradedalong

7．OldSilkRoadlinkingChinatotheMiddleEastandEurope,theimportanceofteawasmatchedonlybysilk.ChinaproducesOolong,black,green,white,yellow

8．dark(post-fermented)tea.TheOolong,greenandblack

9．(vary)aremostnotablefortheirhighquality.MostofChinasteavillagesarefoundinremotemountainousareasinthecountry’ssouthandsouthwest,

10．thebeautifulsceneryisoftenhiddenunderclouds.第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处，每处错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。删除：把多余的词用斜线(＼)划掉。修改：在错的词下画一横线，并在该词下面写出修改后的词。注意：1.每处错误及其修改均限一词；2.只允许修改10处，多者(从第11处起)不计分。Hearinganewsthatthe2023WinterOlympicswouldbeholdinChina,Ifeltveryexcited.ItstrucktomehowIlearnedskatingwhenIwasachild.At7,Ibegantogocrazyaboutskating,likeallmyfriend.Atthebeginning,itextremelytoughformetokeepmybalance.Ialwaysfalloverontheground,asaresultofwhichIthoughtIhadnotalentforskating.SoIgraduallylostconfidenceandbecameimpatient.ThemoreimpatientIwas,themoreterribleIdid.Iwasabouttogiveupwhilemyfathercametomyassistance.Encouragedbyher,Irestoredconfidenceandstoodupagain.AsIpracticedskating,healwayscreatedarelaxedatmosphereandputforwardsomespecificadvice.Eventually,Imadeit.第二节书面表达（满分25分）29．（25分）佳木斯第一中学在9月15日举行了运动会，同学们积极参与，你作为其中的一员，从中体验了什么？感受了什么？收获了什么？请以运动会为主题，写一篇作文，主要内容包括：1.描述让你印象深刻事；2.你的感想和收获；注意：1.词数：100左右；2.可适当增加细节，以使行文连贯。______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

2023学年模拟测试卷参考答案（含详细解析）第一部分（共20小题，每小题1.5分，满分30分）1、B2、A3、B4、B5、D6、A7、A8、B9、D10、D11、B12、D13、B14、D15、C16、B17、B18、C19、A20、B第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21、1、D2、A3、B4、D22、1、A2、C3、A4、D5、B23、1、B2、C3、A4、D24、On29Maylastyear,IwasdoingmyswimtrainingforahalfIronmanraceinthebaynearmyhome.Iwasfinishingmyfirstloop(圈)whenIfeltjawscomingaroundmybodyandasharppain.Thewaterwasdark,soIcouldn’tseeanything.Itjustcameoutofnowhereandthenitwasgoneinaflash.Iknewitwassomethingreallybigandassumeditwasashark.Ipanicked,butknewIneededtogetoutofthewater.Iwaskickingwildlyincaseitcameback.Therewasalifeguardboatcloseby,soIwavedmyarmsintheairandscreamedforhelp.Itgottomewithin20seconds.AtthatpointIdidn’tfeelanything;adrenaline(肾上腺素)hadtakenover.Thelifeguardsheldmeunderthearmsandpulledmeupoutofthewater.Thenthepainkickedinanditwasprettyhardtobear.Somemusclehadbeenbittenoffmyrightarm.Ifeltalotofwarm,gushingblood.Mychestfeltheavy,asifsomeonehadputtheirfootonit,andIwashavin