2023学年青海省西宁市三校高三下学期第五次调研考试英语试题（含解析）

2023学年高考英语模拟测试卷考生须知：1．全卷分选择题和非选择题两部分，全部在答题纸上作答。选择题必须用2B铅笔填涂；非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。2．请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。3．保持卡面清洁，不要折叠，不要弄破、弄皱，在草稿纸、试题卷上答题无效。第一部分（共20小题，每小题1.5分，满分30分）1．ItwasSundaytoday,andI_______upveryearly.Soyoureallyhadagoodrest.A．didn’tneedtoget B．needn’thavegot C．needn’ttoget D．don’tneedget2．Hehaswrittentwoarticlesforthejournal，onetobepublishedinthisissue，theotherto___________inthenext.A．turnout B．comeoutC．bringout. D．leaveout3．It'sthattimeofyearagain，whenAlipay______usjusthowmuchwe'vebeenspending，andonwhat．A．reminds B．remindedC．hasreminded D．isreminding4．Thepoliceareoffering______rewardof$50,000forinformationleadingtothearrestof_____murderer.A．the;the B．a;a C．the;a D．a;the5．Yet_______intheprocessofdevelopmentdidtheystoptoconsidertheimpactoftheir“progress”onnature.A．innotimeB．atnopointC．aslikelyasnotD．moreoftenthannot6．_____tomanagetimewisely,andyoucanmakethemostoutofeachday.A．LearningB．TolearnC．LearnedD．Learn7．—What'swrongwithhim?Heseemedupset.—Hehadtogiveuphisdrawing,notbecausehewanted________thatwaybutbecausehehadtobe.A．thisB．oneC．itD．such8．Havingpicturestocolorwillkeepchildren______forhours.A．amused B．amusingC．amuse D．toamuse9．Therewon’tbeanywheretopark.Oh,_______.Let’strythesubway.A．that’sarealbargainB．that’sagoodpointC．that’sreallysomethingD．that’sallsettled10．Somedrunkendriversthinkthattheymaybeluckyto________afine,whichmaycosttheirownlives.A．getthrough B．getalongwithC．getdownto D．getawaywith11．Whenhewasrunningafterhisbrother,theboylosthis___andhadabadfall.A．balance B．chanceC．memory D．place12．Japanhasbeentryingtobringitsnuclearcrisisunder____control,but____spreadofradiationhasraisedconcernsaboutthesafetyofthenuclearenergy.A．a;the B．the;/ C．/;the D．a;/13．Soonaftergettingoffhishorse,thecaptainappearedatthesecond-floorwindows,______hecouldseenothingbuttrees.A．where B．fromwhereC．which D．fromwhich14．—Ineedtoadvertiseforaroommatefornextterm.—________？Maryisinterested.A．Whybother B．WhynotC．Sowhat D．Whatfor15．Keepupyourspiritsevenifyou_____failhundredsoftimes.A．must B．needC．may D．should16．_____theplantonceaweekifyouaretogetfruitintheautumn.A．WateredB．WateringC．TowaterD．Water17．——Whatwaswrong?Whydidn’tyougotothepicnicasscheduled?——I’msorry.I_________aseriously-injuredoldmantothehospital.A．woulddeliverB．deliveredC．haddeliveredD．wasdelivering18．Iamsothrilledtohavemyunderwaterphotos______intheNationalGeographicandonthecover!A．tobefeatured B．featured C．beingfeatured D．tofeature19．WhatdoesPM2.5mean？It'saprofessional_____________indicatingtheconditionofairpollution.A．number B．markC．term D．item20．Lifeisajourney_____withhardships,joysandspecialmoments.A．filled B．tofill C．filling D．havingfilled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）WritingContests,Grants&Awardsin2019TheWritingContests,Grants（补助金）&Awardsdatabaseincludesdetailsaboutthecreativewritingcontests-includingpoetrycontests,shortstorycompetitions,essaycontests,awardsfornovels,andmore-thatwe'vepublishedin"Poets&WritersMagazine"duringthepastyear.Wecarefullyreviewthepracticesandpoliciesofeachcontestbeforeincludingit.Usetheonlinesubmissionsystem.CatherineDoctorowInnovativeFictionPrizeAprizeof﹩15，000isgivenannuallyforanovel,orastorycollection.U.S.writerswhohavepublishedatleastthreebooksoffictionarequalified.Submitamanuscript（手稿）ofanylength,abriefbiography,andalistofthreepreviouslypublishedbooksoffictionwitha﹩25entryfeebyNovember1,2019.UniversityofAlabamaPress,P.O.Box870380,Tuscaloosa,AL35487.（773）702-7000.WaltWhitmanAwardAprizeof﹩5,000isgivenannuallyforapoetrycollectionbyapoetwhohasnotpublishedabookofpoemsinastandardedition.Thewinningbookwillalsobedistributedto5,000membersoftheAcademyofAmericanPoets.Submitamanuscriptof48to100pageswitha﹩35entryfeebyNovember1,2019.AcademyofAmericanPoets,75MaidenLane,Suite901,NewYork,NY10038.（212）274-0343.GabrieleRicoChallengeinCreativeEssayAprizeof﹩1,333isgivenannuallyforanessay.Usingtheonlinesubmissionsystem,submitanessayofupto5,000wordswitha﹩20entryfee,byNovember1,2019.Allentriesareconsideredforpublication.Visitthewebsiteforcompleteguidelines.SanJoseStateUniversity,EnglishDepartment,OneWashingtonSquare,SanJose,CA95192．（408）924-4425.BrooklynNonfictionPrizeAprizeof﹩500isgivenannuallyforaworkofnonfictionthatissetinBrooklyn,NewYork,andexpressestheregion's"richsoulandintangible（无形的）qualitiesthroughthewriter'sactualexperiencesofBrooklyn."Submitanessayofupto2,500wordsbyNovember15,2019.Thereisnoentryfee．BrooklynNonfictionPrize,P.O.Box491,NewYork,NY10156.（207）778-7071.1、Whohasthequalificationtoattendthecontestfortheprizeof﹩15，000______A．Whoeverhaswritten3novelbooks．B．Whoeverhaspublishedatleast3books．C．U.S.authorswho'vepublished3novelbooks．D．U.S.writerswho'vewritten3poetrycollections．2、WhatwillhappentoyourmanuscriptifyouwinWaltWhitmanAward______A．Itwillbepublishedasabookofpoems．B．Itwillbereadbyalltheacademymembers．C．Itwillbedistributedtowhoeverlikespoems．D．Itwillbecomeabookthatwillsellwell．3、BrooklynNonfictionPrizeisdifferentfromtheotherthreewritingcontestsinthat______．A．theworkmustbeawriter'srealexperiences B．itsentryfeeishigherC．ithasadeadlineearlierthanthem D．thewinnershavenoprizemoney22．（8分）Arewealoneintheuniverse?AteamofscientistsannouncedonJanuary6,2015thattheyhadidentifiedeightplanetsbeyondoursolarsystem,threeorfourofwhichorbitintheirstars’“GoldilocksZone”—theregionwheretemperaturesarenottoohotortoocoldforwater,whichisanecessaryingredientforlifeasweknowit,toexistliquidform.ThismaybegoodnewsforpeoplehopingthatEarthisnottheonlyinhabitedworldintheuniverse.Thescientists,ledbyDr.GuilermoTorresoftheHarvard-SmithsonianCenterforAstrophysics,madethediscoveriesusingdatacollectedbytheplanet-seekingKeplertelescope.NASAlaunchedKeplerin2009.Sincethen,thetelescopehasidentifiedmorethan1,000planetsoutsideofoursolarsystem.TorresandhisteamanalyzedthedataabouttheeightnewlydiscoveredworldtodeterminewhichonesaremostlikelytobesimilartoourEarth.Amongthenewdiscoveries,thescientistssaytheplanetscalledKepler438band442baretheclosesttoEarth.Kepler438bisjustabout10%largerthanourplanet,andgets40%moreofitsenergyfromitsstarthanEarthreceivesfromtheSun.Temperaturestherewouldbeabout140degrees.Kepler442bisabout33%largerthanEarth,butreceives30%lessenergyfromitsstar.Thatwouldmakeitapotentiallychillierworldthanourown.Torressaysitispossibleforlifetoexistandsurviveineitherofthosetemperatures,butforthattohappen,theseplanetswouldneedtohaveanotherkeyingredientforlife:aheat-trappingatmospherelikeEarth’s.WhilethesefindingsaddtothepossibilitythatlifeexistsbeyondEarth,Torrescautionsagainstdrawingconclusions,“Wearenotclaimingtheyareinhabited,”hesays.Infact,theseplanetsaresofarawaythatthescientistscannotobservethemdirectly,whichcanbeexplanationforwhyfornowitremainsunknownwhethertheseplanetscontainlife.Butthediscoveryofplanetsintheirstars’habitablezonessuggeststhatsomewhereoutthere,someformofalienlifemayhavetakenhold.1、Thescientistshaveidentifiedeightplanets,________.A．whicharesuitableforhumanstoliveonB．someofwhicharepossibleforlifetoexistonC．someofwhichhavethesamesituationsasEarthD．whicharenottoohotortoocoldforwatertoexiston2、WhichstatementaboutthediscoveryofTorresandhisteamisTRUE?A．Kepler438bistoohotforanylifetoexiston.B．Kepler438band442barethefarthesttoEarth.C．TheyhavemadethediscoveriesthroughKepler.D．Theyhavediscoveredover1000planetsin7years.3、WhatisthepossiblethingthatKepler442blacksforlifetoexiston?A．Thewater B．ThesunlightC．Thesoil D．Theatmosphere4、Abouttheirexploration,Torreswantstoindicatethat________.A．thereisalotlefttolearnB．theyhavehaddecisivegainsC．itisthefirstinhumanhistoryD．itiscertainforlifeontheplanets5、Whichcanbethebesttitleforthispassage?A．AreWeAlone?B．EyeontheStarsC．DiscoverAnotherEarthD．DiscoveryofNewStarstoLiveon23．（8分）ThingstoDoonaSunnyDayinSanFranciscoSanFranciscodoesn'ttakeitssunnydaysforgranted.Oncethesuncomesoutandthetemperaturesrise,everyoneracestoseizeaspottotakeinanunbelievablecityvieworheadstooneoftheirfavoriteattractions.FindThrillsataThemeParkExperiencethrillridesandattractionsatSixFlagsDiscoveryKingdom,NorthAmerica’sonlythemeparkofwildlife,sealifeandthrillingrides.It’sawonderfulentertainmentexperienceforthewholefamily,withone-of-a-kindadventuresacrossthreeworlds.Cruise(乘船游览)ontheBaySailunderoneofthe"ModernWondersoftheWorld".Watchsealionsandsealsatplay.AndlearnallthesecretsofthefantasticcitybytheBay.Forpeoplewholikethethrillofspeedandwindintheirhair,theseasonalRocketBoat(May-October)istheoptionforyou.TourAT&TParkIt'shometothefamousbaseballteamSanFranciscoGiantsfromApriltoOctobereveryyear,butyoucantakeatourinsideAT&TParkanytimefora"player'seyeview."You'llhaveaccesstothebaseballfield,thevisitors'clubhouse,thepressboxandsoon.RideaBikeovertheGoldenGateBridgeExplorethebeautiful,bike-friendlystreetsandwaterfrontpathsofSanFranciscoallthewaytotheGoldenGateBridgewithanall-daybikerentalfromBlazingSaddles.Theireasy-ridebikes,combinedwiththeirnew,freemobileappfullofhelpfultipsandsightseeingsuggestionsmaketheself-guidedtourseasyandfunforeveryone.1、WhatcantouristsdoatSixFlagsDiscoveryKingdom?A．Experiencethrillingrides.B．LearnallthesecretsofSanFrancisco.C．Takeaplayer'seyeviewoverapark.D．AdmirethesceneryoftheGoldenGateBridge.2、Whicheventattractstouristslovingspeedandwindmost?A．FindThrillsataThemepark B．CruiseontheBayC．TourAt&TPark D．RideaBikeovertheGoldenGateBridge3、Whichofthefollowingofferstouristsafreemobileapp?A．Watchingwildlife. B．Sailingonthebay.C．Visitingabaseballfield. D．RentingabikefromBlazingSaddles24．（8分）阅读理解Onthefirstdayofschoolourprofessorintroducedhimselfandchallengedustogettoknowsomeonewedidn'tknow.Ilookedroundwhenagentlehandtouchedmyshoulder.Iturnedaroundtofindawrinkled,littleoldladywithasmile.Shesaid,“Hi,handsome.MynameisRose.I'meighty­sevenyearsold.CanIgiveyouahug？”Ilaughedandenthusiasticallyresponded,“Ofcourseyoumay！”Shegavemeagiantsqueeze.“Whyareyouincollegeatsuchayoung，innocentage？”Iasked.“IalwaysdreamedofhavingacollegeeducationandnowI'mgettingone！”shetoldme.AfterclasswewalkedtotheStudentUnionbuildingandsharedachocolatemilkshake.Webecameinstantfriends.Everydayofthenextthreemonthswewouldleaveclasstogetherandtalknon­stop.Iwasalwayslisteningtothis“timemachine”asshesharedherwisdomandexperiencewithme.Overthecourseoftheyear,Rosebecameacampusicon(偶像)andsheeasilymadefriendswherevershewent.AttheendofthesemesterweinvitedRosetospeakatourfootballdinner.I'llneverforgetwhatshetaughtus.“Wedonotstopplayingbecauseweareold;wegrowoldbecausewestopplaying.Thereisahugedifferencebetweengrowingolderandgrowingup.Anybodycangrowolder.Thatdoesn'ttakeanytalentorability.Theideaistogrowupbyalwaysfindingopportunitiesinchange.Havenoregrets.Theelderlyusuallydon'thaveregretsforwhatwedid,butratherforthingswedidnotdo.Theonlypeoplewhofeardeatharethosewithregrets.”Sheconcludedherspeechbycourageouslysinging“TheRose”．Shechallengedeachofustostudythelyrics(歌词)andlivethemoutinourdailylife.Attheyear'sendshefinishedthecollegedegreeshehadbegunallthoseyears.OneweekaftergraduationRosediedpeacefullyinhersleep.1、Whathappenedtotheauthoronthefirstdayofschool?A．Hegottoknowanoldprofessor.B．Hemadetheacquaintanceofanoldlady.C．HejoinedtheStudentUnion.D．Hehadtoshareamilkshakewithothers.2、FromtheunderlinedsentenceinParagraph1,wecanfindouttheauthor's________.A．concernaboutageB．respectfortheoldC．curiosityabouttheladyD．complaintabouteducation3、Intheauthor'seyes，________.A．RosewasinnocentandgenerousB．RosewaswiseandskilledC．Rosewastalentedandhard­workingD．Rosewascourageousandherwordswereinspiring4、WhichsayingmightRosepossiblysupport________.A．Oneisnevertoooldtolearn.B．Afriendinneedisafriendindeed.C．Romewasn'tbuiltinaday.D．Itisnousecryingoverspiltmilk.25．（10分）WhenRandyHeisswenthikingbehindhisPatagonia,Ariz.farm,thelastthingheexpectedtofindwasaChristmaslistfromalittlegirlacrosstheUS-Mexicoborder.“IfoundthisballoononmymorningwalknearPatagoniaonSunday.AttachedtoitwasapieceofpaperwiththeChristmaswishesfromalittlegirl,”HeisswroteonhisFacebookpage.Whenhebroughtthelisthometohiswife,whospeaksfluentSpanish,theydeterminedthatthelittlegirlhadaskedforEnchantimalstoys,clothes,artsuppliesandvariousothergifts.That'swhenHeisssetouttomakethelittlegirl'sChristmasdreamscometrue.HeisssaidhehadattemptedtosendChristmasletterstoSantaClausviaballoonwhenhewasakidbutneverreceivedaresponse.HeisssentaFacebookmessageonWednesdaytoXENY,aradiostationinNogales,toseeifitcouldhelphimtrackdownthegirlorherfamily.Helaterreceivedaresponsefromthestation,whichhaddeterminedtheauthoroftheletterwasan4-year-oldgirlnamedDayami,andthestationwantedtosetupameetingbetweenthetwoonThursday.“Itjustchangedmyentireday,”HeisstoldtheWashingtonPost.“InsteadofgoingbacktomyofficeinBisbee,IwentwithmywifetoWalmart.“ThecoupleboughtalmosteverythingonDayami'slist.TheyalsobroughtafewgiftsforDayami'slittlesister,Ximena.Theytoldthechildrentheywere“ayudantesdeSanta,”orSanta'shelpers.Heiss,20,saidtheexperiencewasveryhealingforhimandhiswife.Nineyearsago,thecouple'sonlysondied.“BeingaroundchildrenatChristmastimehasbeenabsentinourlives,”Heisssaid.Wenowhavefriendsforlife.Foraday,thatborderfencewithitsconcertinawiremeltedaway.1、HowdidDayamisendoutherChristmaswishes?A．BycallingHeiss. B．Byattachingthemtoaballoon.C．Bywritingtoaradiostation. D．BysendingaFacebookmessage.2、WhendidHeissknowwhatthegirlexactlywanted?A．Afterthehelpofhiswife.B．Whenhefoundtheballoon.C．AftertheirmeetinginAmerica.D．Whenhegotaresponsefromtheradiostation.3、WhatmightmakeHeissdecidetofulfillthelittlegirl'sChristmaswishes?A．Hisson'swill.B．Thegirlsrequestforhelp.C．Hissimilarunsuccessfulexperience.D．Hisdesiretomakefriendswiththegirl.4、Whatcanweinferfromthelastparagraph?A．Thecouplegotoutofthepaincompletely.B．Theexperiencewasagreatrelieftothecouple.C．ThecouplewouldhelpmorechildrenfromMexico.D．Therewillbenoborderbetweencountriesoneday.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）JohnnyandIlivedinasmallneighborhoodin1955.Wehadboughtourtwoyoungsonstwo1forChristmasandJohnnywouldassemblethemonChristmasEve.ButonChristmasEveday,Johnny2togotoBrookleyAirForceBaseinMobiletorepairajet.Ihadmyhands3withflour,preparingforChristmasdinnerand4twoenergeticboys.Iwasmakingthechocolatecakewhena(n)5knockedonthedoor.ItwasBeatricewhowasthe6persononourroadwithatelephone.Thebasehad7tosaythataheavytorquewrench(扭矩扳手)hadcomeapartinJohnny’shand,makingthehone8.Mysister-in-lawRuthandherhusband,Otto,tookmetothe9whilemymother-in-lawstayedwiththechildren.Wegotthereonlyto10Johnnywithacastonhisarm,eagertogethomealthoughthedoctorrequiredthathe11.ItwasChristmasEve,Johnny12,andhehadbikestoassembleforhisboys.Thedoctorsaidhe’dconsider13himthenextmorningifJohnnycouldfindsomeonetodrivehimhome.OnChristmasmorning,Johnnytriedcallingthemotorpool(车辆调配所).Theysaid14mustcomefromhigherup,soJohnny15makingcalls.16,abigbluecarrolleduptothehospitalaskingforthemanwhoneededa17home.Johnny’smotherandIwereputtingdinneronthetablewhenweheardthecar.Wewere18toseeJohnny.WithOtto’shelp,Johnnyassembledtheboys’gifts.ThatcoldChristmasDay,ourheartswerefullof19forthosewhohadgonetheextramiletobringus20ontheholiday.1、A．cars B．bicycles C．phones D．toys2、A．asked B．refused C．had D．used3、A．full B．decorated C．related D．familiar4、A．searchingfor B．playingwith C．worryingabout D．lookingafter5、A．stranger B．engineer C．operator D．neighbor6、A．last B．right C．only D．first7、A．paused B．called C．decided D．intended8、A．broken B．dirty C．ugly D．abandoned9、A．base B．hospital C．destination D．station10、A．find B．supply C．assist D．equip11、A．leave B．rest C．stay D．relax12、A．believed B．imagined C．expected D．argued13、A．admiring B．dismissing C．rewarding D．assessing14、A．ideas B．demands C．orders D．policies15、A．started B．tried C．kept D．stopped16、A．Suddenly B．Finally C．Instantly D．Gradually17、A．lift B．recipe C．trip D．voyage18、A．thrilled B．embarrassed C．motivated D．terrified19、A．generosity B．consideration C．kindness D．appreciation20、A．close B．apart C．around D．together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）Startinganewschooltermisalwaysexciting.Itisachance1．(see)yourfriendsagain.Butmostexcitingofall,thenewtermletsyoutakeupnewhobbies.InBritain,itiscommonforstudentstotakeupnewhobbiesaftertheChristmasholidays.Mostschoolsofferdifferentkinds2．hobbyclasses.Students3．(usual)takethemintheirfreeperiodsorafterschool.Someclassesyouhavetopayforbutsome4．(be)free.Forexample,IoncetookafreeWednesdayeveninggymnasticsclass5．isofferedbymyschool.ButwhenIlearnthowtoplaythedrum,myparentshadtopayforthelessons.Themostpopularextraclassesatmyschoolwerepianolessonsanddramaclub.Studentswithmanyhobbiessometimesfeltmorestressed6．thosewithoutany.Butthestudentswithhobbiesleftschoolwithmanyextra7．(skill).Ihaven’tcontinuedanyofthehobbiesI8．(begin)atschool.ButIhaveneverregrettedtaking9．(they).My10．(good)friendtodayissomeoneImetinmygymnasticsclass.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：在错的词下划一横线，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仅限一词；2、只允许修改10处，多者（从第11处起）不计分。DearMichael,Howisitgoing?I’mwritingtoinviteyoutoparticipateavoluntaryactivityholdbyourEnglishclub,whichcansurelyimproveourselves、SinceIwillalsojoininit,whynotgoingwithmetoenjoythisactivity?Herearesomeinformationasfollows、AnactivitywillbeheldatXihuPark,whichiscloselytoyourhome、Andthetimeisaboutfrom9:00to11:00pmonSunday、Aimingtodeveloptheawareofprotectingtheenvironment,thevolunteerwilldosomethingvaluabletotheenvironment,suchaspickinguptherubbish,wateringtreesandflowers、Besides,pleaserememberwhichyouneedtomindthegrassandbecarefulaboutyourself、Pleasekeepmeinformeditifyouarewillingtoacceptmyinvitation、Bestwishes、Yours,LiHua第二节书面表达（满分25分）29．（25分）假定你是李华，是一名高一的学生，自从进入高中学习以来你妈妈不允许你上网，她认为上网不仅浪费时间还耽误学习。你不同意她的看法，为此你感到很苦恼。请你用英语写一封信向校英语报的编辑王老师求助。注意：1.文中不得出现真实的人名或地名；2.可适当增加细节，以使行文连贯；3.词数100左右。书信开头和结尾已经给出，不计入总词数。DearMr.Wang,________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________YourssincerelyLiHua

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、A2、B3、A4、D5、B6、D7、C8、A9、B10、D11、A12、C13、B14、A15、C16、D17、D18、B19、C20、A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、C2、B3、A22、1、B2、C3、D4、A5、A23、1、A2、B3、D24、Everyday,peoplecomeintocontactwiththousandsofchemicals.Thesechemicalsaresaidtobeharmlesstohumanhealth.Infact，thechemicalsareconsideredsosafethatwewashwiththem.Weputthemonourbodiesandevenourfaces.Otherchemicalproductsareusedthroughoutourhomes.Bythetimeyouwalkoutofyourfrontdoor,youhavealreadybeenexposedtothousandsofchemicals.Onitsown,eachchemicalseemsharmless.Butincombinationwithotherchemicals,theymaybecomedeadly.Thatisthefindingofatwo-yearstudybyahigh-profiletaskforceofscientists.Thetaskforcewastoldtoinvestigatethecancer-causingpossibilityofchemicalmixtures.LindaGulliverwasoneof174scientistsonthetaskforce.Theirjobwastostudythecancer-causingpotentialof85chemicals.All85aresaidtobecommonintheenvironment.Ms.Gulliverexplainsthatchemicalshavethepotentialorytoformdangerousmixtures.Evensimplemineralscanbecomedangerouswhenmixedwithchemicalsfoundinplasticsorbeautyproducts.Workingingroups,thescientistsexploredhowdifferentchemicalmixturescouldleadtocancer.Ms.Gulliver’steamlookedattheabilityofdifferentcombinationstosupportthein-creaseofmalignant(恶性的)humancells.Shesaysthecurrentwaytoidentifywhetherchemicalscausecanceristotestthemoneatatime.Thismethodleads,sheadds,toalonglistofsupposedly“safe”chemicals.Sheandherteamsaythatapproachneedstochange.“Wedefin