2023年崇左市重点中学高三第二次联考英语试卷（含答案解析）

2023高考英语模拟试卷注意事项1．考试结束后，请将本试卷和答题卡一并交回．2．答题前，请务必将自己的姓名、准考证号用0．5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置．3．请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符．4．作答选择题，必须用2B铅笔将答题卡上对应选项的方框涂满、涂黑；如需改动，请用橡皮擦干净后，再选涂其他答案．作答非选择题，必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答，在其他位置作答一律无效．5．如需作图，须用2B铅笔绘、写清楚，线条、符号等须加黑、加粗．第一部分（共20小题，每小题1.5分，满分30分）1．Thepostofficeisclosed______Saturdayafternoon.A．on B．in C．of D．at2．________workandcreativeactivitieshavebeenimportantdriversofhumanprogressisdeeplyrootedinoursocialvalues.A．HowB．WhetherC．ThatD．Why3．OurEnglishteacher,havingexplainedtoushowtodesignaproject,allowedusawholeweek’spreparationandthen______theclass.A．todismiss B．dismissedC．dismissing D．havingdismissed4．Takethenoteasareminder______youforgottobuysomesweetsforthekidswhileshoppingthere.A．how B．thatC．incase D．evenif5．—IspendtwoweeksinBeijinglastyear.—ThenyoumusthavevisitedtheGreatWallduringyourstay,________you?A．mustn’t B．didn’tC．haven’t D．hadn’t6．Theinfrastructureprojecthasconsumedsomuchmoneythatwecan'tfindanyfinancialsupportandhaveto______.A．pullout B．pullthroughC．catchup D．catchon7．Friendshipcanneverbeatrade;______,itneedsthemostthoroughandunprofitableconcept.A．inaddition B．bycontrast C．inreturn D．bychance8．—Howabouthisdesign?—Well,totellthetruth,itis______butsatisfactory.Soyou’llhavetotryyourbesttobetterit.A．something B．anythingC．everything D．nothing9．Thesilenceofthelibraryissometimesbrokenbyasuddencoughorthesoundofpages________________.A．turning B．turnedC．beingturned D．havingturned10．一Didyouforgetyourpromise,dear?一Ihavefinishedmyhomeworkontime,mom.A．Excuseme. B．Surely.C．Whynot? D．HowcouldI?11．Lastweek,onlytwopeoplecametolookatthehouse,________wantedtobuyit.A．noneofthem B．bothofthem C．noneofwhom D．neitherofwhom12．–What’swrongwithyouripad2?Thesound____isnotclear.--Yes.Ithasbeenbrokenforsometime.A．comeout B．comingout C．tocomeout D．cameout13．Ineedhelpnow!IhavetofixaleakingpipeinmybathroombutI’mnotsure______tobegin.A．whatB．whichC．whereD．when14．Intheearlymorningallofusstoodatthetopofthemountain___________eastofthecity,watching__________burningsunrising.A．/;a B．the;aC．the;the D．/;the15．Julieisoneofthosewomenwhoalwaysthelatestfashion.A．putupwith B．keepupwith C．comeupwith D．getonwith16．InAustralia,manyroadsignsarenowbothinEnglishandChinese,______iteasierforChinesetouriststotravel.A．makingB．madeC．makeD．makes17．Ourbossistoostrictwithus.Ican’t_____inwiththeworksituationhere.A．fit B．get C．make D．take18．Intimewereachedastagewehadmoreyoungreadersthanoldones． A．where B．how C．who D．what19．Don’tbejoking.It’stimeto______yourbusiness.A．setout B．takeup C．goon D．getdown20．Afterlookingatmanynewcars,Ifound________whichIwouldacceptjustassuitable.A．it B．this C．that D．one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）Whenitcomestocarhiring,allcarhirecompaniesrequirethatyoushouldhaveafulldrivinglicenseforatleastoneyear,someofwhommayaskfortwoyears,especiallyforyoungerdrivers.Mostcarhirecompanieswillnotautomaticallyhireoutacartosomeoneundertheageof25ortopeopleover70.Butthereareexceptions.Somelistedcompaniesarenormallypreparedtoservepeopleof21andover.Andsomemaygoovertheagelimitandprovideserviceforolderpeople(aged70andover)providingyouhavenorecordofbreakingthelawandvalidlicense,andadoctor'sletterofgoodhealth.Nowreadonforsomeinformationaboutnationalcompanieswithmanybaseshiringoutcarstopeopleaged21andolderdrivers.1、Whichisarequirementfor72-year-oldBritishMichaeltorentacar?A．Havingacleandrivinglicense.B．Havingrichdrivingexperience.C．Havingalivelyandsharpmind.D．Havingadoctor'srecommendation.2、InwhatwayisAlamoRent-A-Carspecial?A．Itsetsnoupperlimitonage.B．Itchargesthelowestinsurancefee.C．Itonlyprovidesnationwideservice.D．Ithiresoutnoautomaticcarstounder25s.3、What'sthepurposeofthetext?A．ToexplainhowtohirecarsintheUK.B．ToshowthebenefitsofhiringcarsintheUK.C．ToinformpeopleoftheUK'scarrentalservices.D．TointroducesomecheapcarhirespecialsintheUK.22．（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.23．（8分）Dec11,2016markedthe15thanniversaryofChina’sentryintotheWorldTradeOrganization(WTO).Nowthecountryhasgrownintotheworld'ssecond-largesteconomyandthelargesttradingcountry,whilemillionsChinesehavebeenliftedoutofpoverty.And15yearson,beingaWTOmemberhastransformedthenationseverydaylivesforthebetter.ImportsarenowacommonsightinChinesestoresandsupermarkets,whiletheywerepreviouslyrarelyseenonshelves.TheChinesenowhaveaccesstomanyimportsvaryingfromluxurygoodslikehigh-endcarsandfamousbrandwatchestodailynecessitieslikevegetablesandfruits.China’sWTOmembershiphasalsomadeimportslessexpensivefortheChinesepublic.Forinstance,since2005,notariffs(关税）havebeenchargedonChineseimportsofdigitalcamerasandvideogames,alongwithotherdevices.Thishasmadethemlessexpensive.ChineseeducationindustryhasalsobenefitedfromChina’sWTOmembership.ManytopglobaluniversitieshavejoinedforceswithChineseonestoestablishcooperativeeducationinstitutions,bringingforeignteachingconceptstoChinesestudents.Forexample,NewYorkUniversityShanghaiwasjointlyfoundedbyNewYorkUniversityandEastChinaNormalUniversity.Inaddition,anincreasingnumberofChinesestudentsarefurtheringtheirstudiesabroad.AccordingtotheMinistryofducation,523,700studentsstudiedoverseaslastyear,andthenumberisexpectedtocontinuegrowingthisyear.China'sWTOentryhasbroughtbenefitsnotonlytothecountry’speople,butalsototherestoftheworld.However,somedrawbacksalsocomealongwiththemembership.Since2005manyChinesehavebeenunemployedinmanyfields,whichresultsinsomesocialproblems.1、WhatdoweknowaboutWTO?A．Itfocusesonwipingoutpoverty.B．ItacceptedChinaasamemberin2001.C．ItcelebratedChina’sentryintoWTOlastyearD．IthasturnedChinaintothelargesttradingcountry.2、AsforChineseimports,whatattract(s)peoplemost?A．Advancedelectronicdevices.B．High-endcarsandfamousbrandwatches.C．Notariffssincetheyear2005.D．Theirvarietiesandmorereasonableprices.3、WhatdoesthemembershipbringtoChineseeducationindustry?A．Morelargecampuses.B．Advancedteachingdevices.C．Differentteachingideas.D．Increasingforeignstudents.4、Whatdoesthepassagemainlytalkabout?A．ThecharacteristicsofChineseimports.B．Thesocialproblemsinthepastfifteenyears.C．TheapparentbenefitsofChina'sWTOmembership.D．AdvantagesanddisadvantagesofChina’sWTOmembership.24．（8分）Beachesarenotonlygreatforlyingonanddoingwatersports，andinfactoneofthebestwaysofenjoyingthemisaclassicbeachwalk.HereatiWantSun.co.ukwe’vebeensearchingtheglobetofindyoutheworld’sbestandmostfamousbeachwalks，andhere’sourpickofthetop.Clickonthemostinterestingwalksandjoinourtouristprogram.TheFootpathoftheGods,AmalfiCoast，ItalyThenamesaysitallreallyandyoutrulyfeelexcitedthere,walkingalongthiswonderfulmountainpath,whichofferssomeofthemoststrikingviewson(heplanet.ThepathbeginsatthetownofBomeranotocharmingPositanoalongtheUNESCOWorldHeritageareaoftheAmalfiCoast.Thewholewalkwilltakeyouaboutfourandahalfhourstocompleteandpassovernarrowrockypaths.Sydney'sGreatCoastalWalk,AustraliaSydney'scoastlineisoneofthemostbeautifulanddiverselandscapesintheworld.Hereyouhavenationalparks,historicsites,shiningandquietbeachesallinoneplace.Sydney'sGreatCoastalWalkrunsallthewayfromBarrenjoeyinthenorthtoRoyalNationalParkinthesouthandtakesanunbelievablesevendaystocomplete.However,ifyou'renotuptodoingthefullwalk,therearemanydifferentpartsofthewalkthatyoucandorightinthecityitself.Walkingfromthecity9sfamousBondiBeachtothesweepingcurve(大半径曲线）ofBroneBeachtakesjustanhour,whichtakesinsometopsceneries.GreatOceanWalk,AustraliaTheGreatOceanWalkcovers104kmalongVictoria'sfamousGreatOceanRoad,locatedonthesoutherncoastofAustralia,fromtheholidaytownApolloBaytothesplendidTwelveApostles.TheTwelveApostlesarethearea'sfamousstonelandmarkswhichstandoutlikegiantsfromthesea.Thewalkpassesthrougharangeoflandscapesandsights,fromnationalpark,famoussurfingspotsanddesertedbeaches,towildcoastlines,waterfalls,lush(茂盛的）forests,historiclighthouses.Daywalksandshorterthree-hourwalkssuchasTheWreckBeachWalkortheLighthouseCemeteryandLookoutWalkcanalsobeenjoyed.Sonexttimewhenyou'relookingforabeachholiday,don'tjustthinkabouttheholidaytownsandthesand,butconsideramoreactivesunholiday.Ifyouhaveinterestinanyoftheaboveplaces,pleasecontactus,andwecangiveyouthebestservices.1、WhenyouarriveatAmalfiCoast,_________.A．thescenicbeautycanfillyouwithcharmB．thewalkingcanbestartedfromPositanoC．youmustbefedupwiththefootpathD．narrowrockypathsmaytrapyou2、WhatarethedistinctcharacteristicsofSydney'sGreatCoastalWalk?A．Ittakesmorethanaweektocompletethewalk.B．Itprovidesvisitorswithavarietyofgreatlandscapes.C．Itreallyhasthelongestcoastlineintheworld.D．ItstartsfromRoyalNationalParkinChesouth.3、FromtheGreatOceanWalk,Australiawecanknowthat_______.A．mostvisitorshavetofinishthe104kmwalkquicklyB．theTwelveApostlesstandbelowthesurfaceoftheseaC．ApolloBayisattheendoftheGreatOceanWalkD．visitorshavevariouswalkingchoicesthere4、Wherecanweprobablyreadthepassage?A．travelmagazine. B．Ahandbooktotourists.C．Anonlineadvertisement. D．Aposterinaforeigntravelagency.5、Theauthorintendsto________.A．introducethebeautifulbeachesinAustraliaB．presentthewonderfulbeachesintheworldC．tellustheidealtouristdestinationforhealthD．askustojointhetouristprogram25．（10分）Researcherssaytheyhavedevelopedtechnologythatcouldpredictheartattacksyearsbeforetheyhappen.TheyreportusingmathematicalsystemstoexamineCTimagesofapatient’sheart.ACTscanusesX-raysandacomputertomakedetailedpicturesofbones,organsandothertissueinsidethebody.ThenewmethodwasdevelopedbyresearchersattheUniversityofOxfordinEngland.AreportontheirstudywaspublishedinthemedicaljournalTheLancet.AlsotakingpartinthestudywereteamsfromGermanyandtheUS.Mostheartattacksresultfromabuild-upoffattytissueinsidearteries（动脉）thatcarrybloodfromthehearttootherareasofthebody,thusblockingthisflowofbloodandcausingaheartattack.Currently,doctorsuseCTscanstolearnwhenastickysubstancecalledplaquehasalreadybuiltupinsideanartery.Thenewtechnologyisdesignedtopredictwhicharteriesareatriskforfuturebuildup.TheresearchersreportedusingcomputerstoexamineCTscanstomeasurehowmuchfatispresentaroundheartarteries.Thatfatchangeswhenanarterybecomesaffected,servingasanearlywarningsystemforheartattacks.Charalambos,aprofessoratOxfordUniversity,saidhebelievestheresearchshowsthismethodcouldbeveryeffectiveingettingpatientstotakeearlystepstopreventfutureproblems,addingthatresearchershadyettoestimateexactlyhowmanyheartattackscouldbeprevented.Buthesaidhebelievesthetechniquecouldhelpidentifybetween20to30percentofpeopleatriskofhavingone.HeaddedthatthenewtechnologywillmakesuchpredictionseasierbecauseitworkstogetherwithexistingCTtechnology.Theresearchwasbasedontwolarge,independentstudiesof4,000patientsinGermany,andtheUS.AcompanywithtiestoOxfordUniversityisdevelopingaservicetoexamineCTscansofpatientsaroundtheworld,Reutersreported.1、What’stheaimofthenewtechnology?A．Topredictwaystoblockfattyissuesinheartarteries.B．Toprovidedetailedpicturesofhowarterieswork.C．Tobuildcomputermodelsoftheimageofaheart.D．Todecidewhicharteriesarelikelytohavefatbuiltup.2、Whendoesaheartattackgenerallyhappenaccordingtothetext?A．WhentheCTscanaffectstheflowofbloodintheheart.B．Whenfataroundheartarteriesblockstheflowofblood.C．Whenastickymaterialflowsintoanarteryneartheheart.D．Whenbonesandorgansofthebodybegintobeweak.3、Whatisanearlywarningforheartattacks?A．Achangeoffathappeningaroundheartarteries.B．Thefindingofastickymaterialintheblood.C．Thepresenceoffataroundthebonesandorgans.D．Theagingandfailureofarteriesneartheheart.4、What’sthemainideaofthetext?A．Theharmoffatbuild-uptoheartarteries.B．TheuseofCTscanstopreventofheartattacks.C．Researchintotheearlywarningofheartattacks.D．Thewarningthebodygivesaboutheartattacks.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）HannahTaylorisaschoolgirlfromManitoba,Canada.Oneday,whenshewasfiveyearsold,shewaswalkingwithhermotherindowntownWinnipeg.Theysawaman1outofagarbagecan.Sheaskedhermotherwhyhedidthatandhermothersaidthatthemanwashomelessandhungry.Hannahwasvery2.Shecouldn'tunderstandwhysomepeoplehadtolivetheirliveswithoutshelterorenoughfood.Hannahstartedtothinkabouthowshecould3,but,ofcourse,thereisnotalotonefive-year-oldcandotosolve(解决)theproblemofhomelessness.Later,whenHannahattendedschool,shesawanotherhomelessperson.Itwasawoman,4anoldshoppingtrolley（购物车）whichwaspiledwith5.Itseemedthateverythingthewomanownedwasinthem.ThismadeHannahverysad,andevenmore6todosomething.Shehadbeentalkingtohermotheraboutthelivesofhomelesspeople7theyfirstsawthehomelessman.Hermothertoldherthatifshedidsomethingtochangetheproblemthatmadehersad,shewouldn’t8asbad.HannahbegantospeakoutaboutthehomelessnessinManitobaandtheninotherprovinces.Shehopedto9hermessageofhopeandawareness.ShestartedtheLadybugFoudation,anorganizationaimingatgettingridofhomelessness.Shebeganto10“BigBosses”lunches,whereshewouldtrytopersuadelocalbusinessleadersto11tothecause.Shealsoorganizedafundraising(募捐)drivein“LadybugJars”tocollecteveryone`ssparechangeduring“MakeChange”month.Morerecently,thefoundationbegananother12calledNationalRedScarfDay—adaywhenpeopledonate$20andwearredscarvesinsupportofCanada`s13andhomeless.ThereisanemergencyshelterinWinnipegcalled“Hannah`sPlace”,somethingthatHannahisvery14of.Hannah`sPlaceisdividedintoseveralareas,providingshelterforpeoplewhenitissocoldthat15outdoorscanmeandeath.InthemorethanfiveyearssinceHannahbeganheractivities,shehasreceivedalotof16.Forexample,shereceivedthe2007BRICKAwardrecognizingthe17ofyoungpeopletochangetheworld.But18allthis,Hannahstillhasthe19lifeofaWinnipegschoolgirl,exceptthatshepaysregularvisitstohomelesspeople.Hannahisoneofmanyexamplesofyoungpeoplewhoaremakinga20intheworld.Youcan,too!1、A．jumpingB．eatingC．cryingD．waving2、A．annoyedB．nervousC．ashamedD．upset3、A．behaveB．manageC．helpD．work4、A．pushingB．carryingC．buyingD．holding5、A．goodsB．bottlesC．foodsD．bags6、A．excitedB．determinedC．energeticD．grateful7、A．sinceB．unlessC．althoughD．as8、A．soundB．getC．feelD．look9、A．exchangeB．leaveC．keepD．spread10、A．sellB．deliverC．hostD．pack11、A．contributeB．leadC．applyD．agree12、A．campaignB．tripC．procedureD．trial13、A．elderlyB．hungryC．lonelyD．sick14、A．awareB．afraidC．proudD．sure15、A．goingB．sleepingC．travelingD．playing16、A．praisesB．invitationsC．repliesD．appointments17、A．needsB．interestsC．dreamsD．efforts18、A．forB．throughC．besidesD．along19、A．healthyB．publicC．normalD．tough20、A．choiceB．profitC．judgementD．difference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）语法填空TheotherdayI1．(go)tomyfavoritecafesothatIcouldhave2．opportunitytobeamongpeople.Themagicofconnectionsometimeshappensinsuchplaces:asmile,akindgoodmorning,someone3．(offer)youanewspaper,ashortconversationwiththestaff–manypossibilitiesofloveand4．(kind).Well,magicdidhappen.Iheardamanwhowasspeakingwithdifficulty.Inoticedhecouldn’tdosoclearly,5．isoftenthecase,peoplelookedathimorlookeddowntoavoidfeeling6．(embarrass).Iimaginedapersoninthesecircumstanceswouldliketofeelincludedratherthanexcluded.SoIdecidedtolookathim7．purposeandsmile.Helookedatme,smilingandsaid“hello”atonce.Withacombinationofspokenandbodylanguageheasked8．hecouldapproachmeornot.Iagreed.Heintroducedmetohisfriendsandexplainedthattheywerebothdeafandoneof9．(they)taughtsignlanguageonline.IapologizedfornotknowingsignlanguageandwishedIhadlearned.Westillmanaged10．(have)abeautiful“conversation”whichmadeusveryhappy.I’msurewewillmeetagain.Suchisthemagicofbeingwithothers.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。DearKen,Iamveryexcitingtolearnthatyou’recomingtoBeijingfortheOlympics、Bothmyparentmissyoualot、Sodoourfriend,Cathy、AugustisthebesttimeoftheyeartovisitBeijing,becauseofthereisonlyafewrainandtheweatherisneithertoohotnortoocold、TherearesomuchplacesIwanttotakeyoutoafterIfinishmyworklikeavolunteer、Whenyoucome,youcanstaywithourselves、MyhomeisaboutthreekilometersfarfromtheNationalStadium,alsoknownasthe“Bird’sNest”,whereopeningceremonywillbeheld、Bestregards, Janet第二节书面表达（满分25分）29．（25分）假定你是李华，一位美国中学生Peter来信想与你成为笔友，你也有同样的愿望。请根据下面的要点提示，用英语给他回一封信。自我介绍；你的学校生活；询问对方的情况及学校生活；期望对方回复。注意：1.词数100左右；2.可适当增加细节，以使行文连贯。DearPeter,Yours,LiHua

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、C3、B4、C5、B6、A7、B8、B9、C10、D11、D12、B13、C14、A15、B16、A17、B18、A19、A20、D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、A2、A3、C22、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.“Wedefinitelyneedcertainresearch…tofindoutwhatmixturesofchemicalswouldbemoreharmfulthanothers;whatgroupsofchemicals,whentogether,wouldproducemoreharmfuleffects.