统考版2025届高考英语一轮复习课时提能练必修5Unit2Theenvironment含解析牛津译林版

PAGE课时提能练(二十七)必修5Unit2Theenvironment(A)A：学问层面Ⅰ.单句语法填空1．Trafficisbad，particularly(particular)inthecitycentre.2．You'dbettergohomebeforeyourmoneyrunsout.3．I'dappreciateitifyoucouldtellmemoreabouttheactivity.4．Thelittleboyimpressedmewithhisbig，brighteyesthefirsttimeIsawhim.5．Becausesheisunderage，herparentsstilltaketheresponsibility(responsible)forher.Ⅱ.单句改错1．WhenIcamein，Isawmysonsittingunderthetree，absorbinginhisvideogames.absorbing→absorbed2．Itissowettherethatthetreesareextremelytall，somemeasuredover90meters.measured→measuring3．Manyteachersholdabeliefwhichextendedstudyingtimedoesn'tnecessarilyimprovetheirstudents'grades.which→that4．Thedoctorsdecidedtooperatethepatientforhislungcancer.operate后加on5．Ourfoodhasbeenrunout，sowemustgotothemarketbeforeourguestsarrive.去掉beenⅢ.语境语法填空Peoplearehavingadebateaboutwhether1.to_develop(develop)theeconomyorprotecttheenvironment.2.InLinShuiqing'sopinion，3.itisourdutytocutbackon4.production(produce)andreducethequantitiesofthingswemakeandbuy.5.WhileQianLiweithinksthatbusinessmenarenot6.greedy(greed)andtheydon'thidetheirresponsibilities，either.Asfarasheisconcerned，thepeople7.operating(operate)thesefactoriesaredeeplyconcerned8.abouttheenvironment，and9.should_be_given(give)morecredit.Infact，manypeopleare10.willing(will)topayalittlehigherpriceforthingsthatarefriendlytotheenvironment.Ⅳ.完成句子1．她用心忙家务，所以没有留意到儿子离开房间。Shewas_so_absorbed_in_her_houseworkthatshedidn'tnoticehersonleavetheroom.2．当天气变得太热时，我就不喜爱了。Idon'tlike_it_whentheweathergetstoohot.3．教室的前面是一个操场，我们每天早上在那里做早操。In_front_of_the_classroom_isaplaygroundwherewedomorningexerciseseverymorning.4．这家汽车厂现在的产量是五年前的三倍。Thecarfactorycanproducethree_times_what_it_didfiveyearsago.5．你吃得越多，就会越胖。The_moreyoueat，thefatteryouwillbe.B：实力层面Ⅰ.阅读理解(2024·合肥市其次次教学质量检测)AnewstudyrecentlyfoundthatelephantsinCentralAfricanforestscanencouragethegrowthofslow­growingtreesandincreasetheabilityoftheforesttostorecarbon.“Asatree，there'satrade­off—youcan'thaveitall，”explainedFabioBerzaghi，wholedthestudy.“Youeitherinvestenergyingrowingfast，orinbuildingalotofstructurewithcarbontobemoreresistant.”Elephantsprefertoeatfast­growingtreesinmoreopenspaces.Astheyfeedandwalk，theycausedamagetothesespecies，knockingovertreesorbreakingoffbranches，whichresultsinanecosystemthatfavorslarge，slow­growinghardwoodtrees.“Astheelephantsthintheforest，theyincreasethenumberofslow­growingtreesandtheforestiscapableofstoringmorecarbon，”saidStephenBlake，oneofthepaper'sauthors.ScientistscollectedfieldmeasurementsintheCongoBasinandusedacomputermodeltopredicthowelephantswouldaffectforeststructure，andcarbonstoragepotentialinthelongterm.Thedataconfirmedthatwhenelephantsarepresent，theforestcontainslargertreesandhigherabundanceofspecieswithhighwooddensity.Conversely(相反地)，shouldforestelephantsgoextinct，leavingthoseslow­growingtreesstrugglingtocompetewithfast­growingspecies，itwouldresultina7percentlossofabove­groundbiomass(生物量)．Asaresult，CentralAfricanforestscouldloseuptothreebilliontonsofcarbon，potentiallyacceleratingclimatechange.Thesadrealityisthathumansaredoingtheirbesttoridtheenvironmentofelephants.“Thisstudycomesatatimewhenforestelephantsarethreatenedasneverbefore，”saidIainDouglas­Hamilton，founderofSavetheElephants.“ItisshockingthatjustaswearebeginningtounderstandhowelephantsmighthaveakeyroleinAfricainstoringcarbon，theyareunderrealthreatofextinction.”Onelimitationofthestudy，Mr.Berzaghisaid，isthatwedonotknowhowmuchcarbonhasalreadybeenlostbecauseoftheelephants'decline.Butitdoesseemcertain，headded，thatputtingastoptoillegalhuntingandrestoringforestelephantpopulationswouldbringclimatebenefits.【语篇解读】最近一项新的探讨发觉，在中非森林中活动的大象能促进生长缓慢的树木的生长，并能提高森林贮存碳的实力。人类非法猎杀大象不仅会使大象面临灭亡的威逼，而且会对气候造成不良影响。1．Whatcanweinferaboutslow­growingtreesinParagraph2?A．Theyareelephants'favoritefood.B．Theyareeasilyhurtbyelephants.C．Theycanhelpforestsstorecarbon.D．Theymayreduceelephantpopulations.C[推理推断题。依据其次段尾句中StephenBlake所说的话“Astheelephantsthintheforest，theyincreasethenumberofslow­growingtreesandtheforestiscapableofstoringmorecarbon”可知，大象的活动增加了生长缓慢的树木的数量，这使森林能贮存更多的碳。据此可以推知，生长缓慢的树木有利于森林贮存碳，故C项正确。]2．WhatwouldhappenwithoutelephantslivinginCentralAfricanforests?A．Climatechangewouldpossiblybespedup.B．Theforeststructurewouldremainunchanged.C．Theforestswouldlosemorefast­growingtrees.D．Largertreeswoulddefeatfast­growingspecies.A[推理推断题。依据第三段最终两句“Conversely(相反地)，shouldforestelephants...potentiallyacceleratingclimatechange”可知，假如森林中的大象灭亡，那些生长缓慢的树木将努力地与生长快速的物种竞争，这将导致地面生物量削减7%。其结果是，中非森林将失去高达30亿吨的碳，这有可能加速气候变更。据此可以推知，假如中非森林中没有大象，则该地区的气候可能会加速变更，故A项正确。]3．WhatdidMr.Berzaghisuggestpeopledo?A．Leadalow­carbonlife.B．Evaluatethecarbonloss.C．Stopdestroyingforests.D．Protectforestelephants.D[细微环节理解题。依据本文尾句“Butitdoesseemcertain...wouldbringclimatebenefits”可知，Berzaghi先生认为，停止非法捕杀并复原森林中大象的数量，会给气候带来好处。据此可知，Berzaghi先生提议爱护森林中的大象，故D项正确。]4．Whatisthebesttitleforthetext?A．HumansandNatureLiveinHarmonyB．ElephantsDisappearinPartsofAfricaC．ClimateD．ElephantsDefendAgainstClimateChangeD[标题推断题。通读全文可知，本文第一句和最终一句概括了全文的主旨，又结合文中的其他内容可知，本文通过分析中非森林中大象的活动对气候变更的影响，说明白爱护森林中的大象对气候有好处，故D项最适合作本文标题。]Ⅱ.完形填空(2024·西安五校高三联考)Two­year­oldNancyisdeaf.However，thathasn'tstoppedherfrombeinga(n)__1__littlegirltryingto“chat”toanyoneshemeets.Assoonasshegoesoutintotownwithherparents，shestarts__2__inthehopethatthepersonsheistalkingto__3__signlanguagetoo.Normally，hearinglossisasocial__4__forthosewhodon'tknowhowtousesignlanguage.AnyoneNancytriedtotalkto__5__thisandfeltsosorrytheycouldn't__6__.Theywishedtheycould__7__herandsaysomethingback，buttheyfoundthemselvescompletely__8__.Then，somethingamazinghappened.Insteadofcausinga(n)__9__，thisbarrierbroughtthecommunitytogether.Determinedto__10__signlanguagesothattheycouldtalktoNancy，her__11__hiredaninstructorontheirown.Andnowthey__12__lotsoftimetakingclassestogether.Theteacher__13__thatthisisreallyremarkablebecause，quiteoften，eventheparentsofdeafchildrendon't__14__tolearnthislanguage.ButhereNancyhasafullcommunitythatissigningandcommunicatingwithher，anditisa__15__story.TheteacheralsosaysthatitwillmakeahugedifferenceinNancy's__16__.Italmostcertainlyguaranteesthatshewillbeahappier__17__inthefuture.Nancy'sparentsarealreadynoticinga__18__intheirdaughterandtheyhavenowordstoexpresshow__19__theyaretotheirneighbors.Withalittlegirlandalotoflove，theneighbors__20__maketheneighborhoodalovingcommunity.【语篇解读】Nancy从小失聪，但是这并没有阻挡她成为一个外向的、想要与他人沟通的孩子。她用手语和四周的人沟通，但是大家都听不懂。于是她的邻居们请了一位老师来教他们学习手语，老师认为这是一个了不得的举动。因为这个小女孩和大家为她做的事，这个社区团结在了一起。1．A.independent B．helpfulC．outgoing D．generousC[依据空后的“littlegirltryingto‘chat’toanyoneshemeets”可知，失聪并没有阻挡Nancy成为一个外向的(outgoing)小女孩，她试图和遇到的每一个人闲聊。]2．A.signing B．cheeringC．waving D．smilingA[依据上文可知Nancy失聪了，此处表示她起先运用手语，她希望她要交谈的人也懂(know)手语。此处对应下文中的“signlanguage”。sign意为“打手语”。]3．A.accepts B．knowsC．recognizes D．appreciatesB[参见上题解析。know“知道，了解”。]4．A.mistake B．stressC．conflict D．barrierD[依据语境可知，正常状况下，对于那些不知道如何运用手语的人来说，听力丢失是一种社交障碍(barrier)。]5．A.discussed B．ignoredC．realized D．deniedC[依据下文表述的每一个Nancy欲交谈的人都很愧疚他们不能回应(respond)，说明他们是意识到了这一点的。]6．A.respond B．apologizeC．return D．agreeA[参见上题解析。]7．A.inspire B．protectC．trust D．understandD[依据空后的“saysomethingback”可知，他们希望他们能够明白Nancy的意思。]8．A.atrisk B．insurpriseC．ataloss D．inahurryC[依据句中的“but”并结合语境可知，此处和上文形成转折，说明他们发觉自己完全听不懂。ataloss“困惑，不知所措”。]9．A.separation B．debateC．complaint D．argumentA[依据空前的“Insteadof”以及空后的“thisbarrierbroughtthecommunitytogether”可知，这个障碍并没有造成隔阂，反而把社区团结在了一起。separation意为“分别，隔离”。]10．A.create B．learnC．translate D．improveB[依据下文中的“theycouldtalktoNancy”“hiredaninstructor”“takingclassestogether”可知，他们决心要学会手语来跟Nancy沟通。]11．A.classmates B．parentsC．teachers D．neighborsD[依据上文中的“thecommunity”和下文Nancy的父母很感谢这些邻居可知，Nancy的邻居们请了一位老师来教他们手语。]12．A.spend B．costC．obtain D．useA[依据上文内容并结合语境可知，他们现在花费(spend)许多时间上课。]13．A.warns B．predictsC．says D．regretsC[依据语境及下文中的“Theteacheralsosays”可知，老师说这真的很了不得，因为许多时候，甚至是失聪儿童的父母也不会费心学习这种沟通方式。]14．A.fail B．botherC．hesitate D．refuseB[参见上题解析。bother“费心”。]15．A.relaxing B．popularC．humorous D．beautifulD[依据句中的“ButhereNancyhasafullcommunitythatissigningandcommunicatingwithher”并结合语境可知，这是一个美妙的(beautiful)故事。]16．A.plan B．hearingC．life D．opinionC[空后一句表述这种做法几乎确定确保Nancy将来会成为一个更加欢乐的人，说明邻居们的做法会对Nancy的生活产生巨大的影响。]17．A.actor B．individualC．student D．workerB[参见上题解析。]18．A.potential B．beliefC．strength D．differenceD[依据上文中的“makeahugedifference”和下文Nancy的父母很感谢邻居们可知，Nancy发生了变更。difference意为“变更(之处)”。]19．A.friendly B．gratefulC．important D．familiarB[依据上文邻居们为Nancy所做的事情并结合语境可知，此处表示Nancy的父母无法用言语来表达对邻居们的感谢之情。]20．A.truly B．almostC．merely D．evenA[该句总结全文，依据全文内容可知，因为这个小女孩以及邻居们对她的爱，邻居们真正地把这个居住区变成了一个充溢爱的社区。]课时提能练(二十八)必修5Unit2Theenvironment(B)A：学问层面Ⅰ.语境语法填空AWiththe1.development(develop)ofeconomy，theenvironmentisgettingworseandworse.It'stimethatwe2.should_take/took(take)measurestoprotectit.Firstly，it'sveryimportanttodevelopoursenseof3.responsibility(responsible)．Onlywhenwerealizetheimportanceofprotectingtheenvironmentarewewillingtodoourpartsforit.Secondly，weshouldtrytochangeourwayoflife.Thirdly，recyclethethingsthathavebeenused.Aboveall，weshouldtryourbesttocutbackon4.pollution(pollute)oftheenvironmentinordertoliveabetterlife.BPeoplearehavingadebateabout1.whethertodeveloptheeconomyorprotecttheenvironment.InLinShuiqing'sopinion，itisourduty2.to_cut(cut)backonproductionandreducethenumberofthingswemakeandbuy.WhileQianLiweithinksthatbusinessmenarenotgreedyandtheydon'thidetheir3.responsibilities(responsibility)either.Asfarashe4.is_concerned(concern)，thepeopleoperatingthesefactoriesare5.deeply(deep)concernedabouttheenvironment，andweshouldgivethemmorecredit.Infact，manypeoplearewillingtopayalittle6.higher(high)priceforthingsthatare7.friendly(friend)totheenvironment.Ⅱ.语境短文改错依据课文内容，对下面材料进行修改。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。Asthethirdlongriverintheworld，thehealthoftheYangtzeRiverhasraisedconcernbothinChinaorabroad.Rapiddevelopmentandanincreaseinpopulationhasmeantthattheamountofwatertakingfromtheriverisrising.ThisisnotagoodnewsforthepeoplewhomrelyontheYangtzeRiverforwater.ManypeoplehaverecognizedtheimportantofprotectingtheYangtzeRiver，andorganizationsandprojectshavebeensetuptodealabouttheproblem.Becausethis，thesituationontheYangtzeRiverisimproving.TheeffortsoftheChinesegovernmentandpeopletoprotectthismuch­lovedriverwouldbeappreciatedforyearstocome.[答案]Asthethirdeq\f(long,longest)riverintheworld，thehealthoftheYangtzeRiverhasraisedconcernbothinChinaeq\f(or,and)abroad.Rapiddevelopmentandanincreaseinpopulationeq\f(has,have)meantthattheamountofwatereq\f(taking,taken)fromtheriverisrising.Thisisnoteq\o(a,＼)goodnewsforthepeopleeq\f(whom,who/that)relyontheYangtzeRiverforwater.Manypeoplehaverecognizedtheeq\f(important,importance)ofprotectingtheYangtzeRiver，andorganizationsandprojectshavebeensetuptodealeq\f(about,with)theproblem.Becauseeq\o(\s\up7(∧),\s\do5(of))this，thesituationontheYangtzeRiverisimproving.TheeffortsoftheChinesegovernmentandpeopletoprotectthismuch­lovedrivereq\f(would,will)beappreciatedforyearstocome.Ⅲ.依据提示补全句子1．计算机已经变更了我们的工作和消遣方式。(way引导定语从句)Computershavechangedthe_way_(that/in_which)_we_work_and_play.2．假如下次的月考他还没考好，他将会怎么样呢？(whatif)What_ifhefailsinthenextmonthlyexaminationagain?3．快点——我们剩下的时间不多了。(runoutof)Hurryup—weare_running_out_of_time.4．每个人都穿着他们最好的衣服，渴望给我们留下好的印象。(impression)Everyonewasdressedintheirbestclothes，eagertomake_a_good_impression_onus.B：实力层面Ⅰ.阅读理解(2024·开封市高三模拟)ThebusstopsintheDutchcityofUtrechtareasbeautifulastheyarepractical.Now,316busstopsfeatureagreenroofthataddssomelifetothecity，whilealsostoringrainwater，catchingdust，andprovidingsomemuchneededshadeduringthehotmonths.Thisprojectisgoodforthehoneybeepopulationthatisattractedtotheplantsontheroof.Tokeepupthissuccessfulecosystem，municipalworkersdrivearoundinelectriccars，takingcareoftheminigardens.Anotheroneofthebiggestbenefitstocomeoutofthesegreenstopsistheimprovedairquality.Smoking，cars，andbacteriaallcontributetopollutingtheairwebreathe.Theseeco­friendlypublicspacesactasanairpurifier(净化器)forurbanpeople，thoughhumansaren'ttheonlygroupthatbenefitsfromthem.Utrechthasalsomadegreateffortstowardsmovingtheirtransportationsystemawayfromgas­guzzling(耗油的)buses.Thecityhasreplaced10gas­guzzlingbuseswithelectricbusesandplanstohaveonlyCO2­inactivebusesontheroadsby2028.Thebuseshaveasystemthatrecordsthedriver'sefficiencyandcomfortlevels.Driverscanwinprizesbasedonhowsafeandcomfortabletherideis.Thecityisalsooneofthemostbicycle­friendlyplacesintheworld.Roadshavebeenredesignedforcyclists'convenienceandthereisanewstate­of­the­artbicycleparkingareathatislocatedbeneathUtrecht'scentraltrainstation.Utrechtoffersincentives(嘉奖)tokeepcitizensenergizedandmotivatedtolivegreenerlives.There'reevenincentivesforpeopletotransformtheirroofsintogreenroofstoo.Achievingthegoalsofaneco­friendlycitytakescooperationandUtrechtisleadingthewaytoprotectourenvironment.【语篇解读】文章主要讲解并描述了荷兰乌得勒支市对公共交通系统的改造状况。该市通过改造公交车站、运用电动公交车等手段，以进一步削减公交系统对环境带来的负面影响。1．WhatisspecialaboutthebusstopsinUtrecht?A．Theyareeco­friendly.B．Theycansavealotofenergy.C．Theyareartificiallyintelligent.D．Theycanprovidepowerforbuses.A[细微环节理解题。依据其次段第一句“Anotheroneofthebiggestbenefitstocomeoutofthesegreenstopsistheimprovedairquality”可知，该市的车站的特殊之处在于其特别环保，故选A。]2．WhatcanweinferaboutthechangestothetransportationsysteminUtrecht?A．Notallbusesaregas­guzzlingatpresent.B．Gas­guzzlingcarshavebeencompletelyreplaced.C．Onlyelectricprivatecarsareallowedontheroads.D．Buseshaveairpurifiersfixedonthem.A[推理推断题。依据第三段其次句中的“Thecityhasreplaced10gas­guzzlingbuseswithelectricbuses”可知，该市已经将10辆耗油的公交车换成了电动公交车。由此可以推想出，当前并不是全部的公交车都是耗油的车，故选A。]3．WhatmightpassengerscommentonthebusserviceinUtrecht?A．Busesarealwaystoocrowded.B．Busesareoftenbehindschedule.C．Busesaretoobigforredesignedroads.D．Busesaregenerallycomfortableandsafe.D[推理推断题。依据第四段其次句“Driverscanwinprizesbasedonhowsafeandcomfortabletherideis”可知，司机可以依据所供应的乘车服务的平安和舒适程度来赢得奖品。由此可以推想出，乘客可能会对公交服务表示感到平安与舒适，故选D。]4．WhatarepeoplelivinginUtrechtencouragedtodo?A．Giveupsmoking.B．Creategardensontheirroofs.C．Painttheirroofsgreen.D．Consumemorehoney.B[细微环节理解题。依据第五段其次句“There'reevenincentivesforpeopletotransformtheirroofsintogreenroofstoo”可知，该市还有为将屋顶改造成绿色屋顶的人们供应的嘉奖。由此可知，B项符合文意。]Ⅱ.阅读七选五(2024·沈阳市教学质量监测)Leadingasustainable(不破坏环境的)lifestyledoesn'trequireyoutohavetomakegreatchangestoyourhome，andthiskindoftransformationdoesn'thavetobeanexhaustingexercise.__1__Herearethreeofthem.__2___Byusingsolarenergy，youwillmakeyourhomefarmoresustainable.Solongasthereisthesuninthesky，thesolarpanelsatopyourhousewillcatchtheraysandthentransformthemintoelectricity.Makechangestoyourwaterdrinkinghabits.Haveyoueverthoughtabouthowmanysingle­useplasticbottlesyouuseayear?Ifyoushouldeverperformsuchacount，you'dfindyourselfwellintothreefigures，ormaybeevenfour.__3__Tobetrulysustainable，you'vetochangeyourwaterdrinkinghabits.__4__Moreoftenthannot，thesetypesofstrawsareusedonlyoncebeforebeinggotridofandtakingupvaluablelandfillspace.Reduceyourtransportemission(排放)．Ifyouwanttobeamoresustainabletraveller，youshouldseektoreducethecarbonemissionsyouproducebyavoidingdriving.Ofcourse，avoidingmotorvehiclesentirelyisn'talwaysgoingtobeapracticalchoiceforyou.There're，however，stillthingsyoucandotobemoresustainable.__5__Youhavethepowertomakeasustainablechangetoyourlifestyle—taketheaboveadviceanddon'twasteit.A．Turntosolarenergy.B．Avoidwastingvaluableresources.C．Thebestthingyoucandoiscycle，walk，orrun.D．Twochoicesyouhavearesharingcarsandtakingpublictransport.E．There'remanyeasyandsimplethingsyoucandotobemoresustainable.F．Anotherchangeyoucanmakeinthisinstanceistostopusingplasticstraws.G．Drinkingwaterlikethismightbequick，easyandconvenient，butit'snotsustainable.【语篇解读】本文介绍了三条有助于养成环保生活方式的建议，包括运用太阳能、变更饮水习惯以及削减交通工具的碳排放量。1．E[依据空前的“thiskindoftransformationdoesn'thavetobeanexhaustingexercise”可知，这种变更不确定是一项使人乏累的活动，并结合空后一句表述的“这里是它们中的三个”以及下文表述的三个建议可知，E项与此处匹配。]2．A[依据空后的“Byusingsolarenergy，youwillmakeyourhomefarmoresustainable”可知，该段讲的是“运用太阳能”的建议，故A项符合语境。]3．G[该段主要谈论变更饮水的习惯，空前一句表述假如你数过数量，你会发觉你一年中因饮水而用的一次性塑料瓶的数量能达到三位数，或者甚至可能是四位数，由此可知，空处应是对饮用塑料瓶装水的评价，故选G。]4．F[依据空后一句中的“thesetypesofstraws”可知，F项“就这个状况而言，你可以做出的另一个变更是停止运用塑料吸管”符合语境。]5．D[该部分谈论的是在交通工具的碳排放量方面如何培育环保的生活方式，空前一句表述仍旧有一些你能做的事情来使你的生活方式更加环保，D项中的“Twochoices”与此处呼应，且整句话表述的内容与此段内容匹配，故选D项。]Ⅲ.语法填空(2024·长沙市统一模拟)Accordingto1._______newstudybytheWHO(WorldHealthOrganization)，about25percentofadultsworldwidedonotgetenoughexercise.Becauseofthis，about1.4billionpeopleare2.________greaterriskofdeveloping3.________(dead)diseasessuchasheartdiseaseandcancer.Whenitcomesto4._________(exercise)more，expertssaythatpeopleneedn'tgotothegymeveryday.Thereareotherwaystoexercise.Forexample，wecantakethestairsinsteadoftakinganelevator.Andstandingononelegfor30secondseachday5.________(be)alsogoodforourhealth.Thestudyalsofindsthatwomenarelessactivethanmenbecause6.________(them)tendtospendmoretimeathometakingcareof7.________(child)anddoinghousework.Countrieswithhigherincomesshowhigherratesofinactivity.Forexample，peopleinKuwaitandtheUnitedStatesexerciseless8._________peopleinUgandaandNepal.Thisispartlybecausein9._________(develop)areas，deskjobshavetakentheplaceofphysicallaborandcars10.________(replace)walking.【语篇解读】世界卫生组织的一项新的探讨发觉，全世界大约有25%的成年人缺乏足够的熬炼；女性由于要照看孩子和做家务，与男性相比熬炼得少。此外，高收入国家的人们比低收入国家的人们熬炼得少。1．a[考查冠词。依据语境可知，该处泛指“一项新的探讨”，故用不定冠词；又new的发音以辅音音素开头，故用a。]2．at[考查固定搭配。此处表示正因为如此，约有14亿人有较大的患心脏病和癌症等致命疾病的风险。atriskof...“有……的风险”。]3．deadly[考查形容词。该处指“致命的疾病”，故用形容词deadly“致命的”，修饰名词diseases。]4．exercising[考查动名词。whenitcomestodoingsth.“当涉及做某事时”为固定用法，故空处应用动名词形式。]5．is[考查时态和主谓一样。此处为客观描述，应用一般现在时，又该句主语为动名词短语“standing