大学英语六级完型填空真题

大学英语六级完型填空真题(-)大学英语六级完型填空真题(-)大学英语六级完型填空真题(-)大学英语六级-选词填空专项训练CET6-cloze-2021-6-1Let'ssayyouloveroller-skating.Justthethoughtof__26__onyourroller-skatesbringsasmiletoyourface.Youalsoknowthatroller-skatingisexcellentexercise.Youhavea__27__attitudetowardit.Thisdescriptionofroller-skating__28__thethreecomponentsofanattitude:affect,cognition,andbehavior.Youlovetheactivity;it'sgreatfun.Thesefeelings__29__theaffectiveoremotionalcomponent;theyareanimportantingredientinattitudes.Theknowledgewehaveabouttheobjectconstitutesthecognitivecomponentofanattitude.Youunderstandthehealth__30__thattheactivitycanbring.Finally,attitudeshaveabehavioralcomponent.Ourattitudes__31__ustogooutsidetoenjoyroller-skating.Now,wedon'twanttoleaveyouwiththe__32__thatthesethreecomponentsalwaysworktogether__33__.Theydon't;sometimestheyclash.Forexample,let'ssayyoulovepizza(affectivecomponent);however,youhavehighcholesterolandunderstand(knowledgecomponent)thateatingpizzamaybebadforyourhealth.Whichbehaviorwillyourattituderesultin,eatingpizzaor__34__it?Theanswerdependsonwhichcomponenthappenstobestronger.Ifyouarewalkingpastapizzarestaurantatlunchtime,youremotionsandfeelingsprobablywillbestrongerthanyourknowledgethatpizzamaynotbethebestfoodforyourhealth.Inthatinstance,youhavepizzaforlunch.Ifyouareathometryingtodecidewheretogofordinner,however,theknowledgecomponentmay__35__,andyoudecidetogowhereyoucaneatahealthiermeal.KEY:26[N]空格前的of说明此处应填入动名词，与介词on搭配。空格后的roller-skates指“滑冰鞋〞，词库的动名词中，strapping可与on搭配，后接表示鞋子的宾语，意为“用带子系上(鞋子〕〞，切合此处语境。27[I]此处需填入修饰attitude的词，由a可知需填入的单词是辅音字母开头的。上文提到“你〞喜爱溜旱冰，穿上鞋子就浅笑。“你〞相同知道溜旱冰是很好的运动，所以这类态度是踊跃正面的，故填入positive“踊跃的〞。28[D]此处应填入谓语动词，由主语description可知是第三人称单数形式。文章开头的Let'ssay...说明第一段对溜旱冰的描述是举例，所以此处切合语义逻辑的是illustrates说明“，说明〞，该处句子的意思是“对溜旱冰的描陈述了然态度有三个构成局部〞。29[C]此处应填入谓语动词，由主语feelings可知是动词原形。本句要说明态度的第一个局部affect感情“〞，主语thesefeelings指的是对溜旱冰这项活动的喜爱之情，highlight“重申，突出〞与宾语theaffectiveoremotionalcomponent感情“或感情局部〞搭配合理。而prevail流“行，流行；获胜〞是不及物动词,prompt推“动；提示〞在语义上也不合逻辑。30[B]空格在名词health以后，可能填入副词或名词。由于空格后的thattheactivitycanbring“这项活动可以带来的〞是定语从句，故应填入名词，充任从句先行词。第一段提到“你〞知道溜旱冰是极好的运动(excellentexercise)，所以本句填入语义有关的benefits利处“〞。131[L]此处应填入谓语动词，构成～sb.todosth.构造，主语attitudes说明该词是原形。切合要求的是prompt“促进〞，句子意思是“我们的态度促进我们去外面享受溜旱冰的乐趣〞。32[E]空格前的the说明此处应填入名词，空格后that指引的是同位语从句，意为“这三个构成局部老是协调一致的〞。impression“印象〞切合上下文语义，指“我们不想给你留下这类印象〞呼，应后文“它们其实不是〞。33[H]空格在worktogether以后，故应填入副词。perfectly完满“地〞切合语境，指这三个局部配合完满。上下文没有表示动作先后的描述，故primarily主“要地，第一〞不对。34[A]由or可知此处应填入与eating并列的动名词，意思上表示相反的状况，所以avoiding避“免〞正确，指“吃比萨仍是不吃〞。35[J]空格前的may说明此处应填入动词原形，且是不及物动词。上一句提到感情局部可能更强的情况〔probablywillbestronger〕，本句指认知局部更强的状况，故填入与bestronger近义的prevail获“胜〞。CET6-cloze-2021-6-2Questions26to35arebasedonthefollowingpassage.Theroboticsrevolutionissettobringhumansfacetofacewithanoldfear—man-madecreationsassmartandcapableaswearebutwithoutamoralcompass.Asrobotstakeonevermorecomplexroles,thequestionnaturally26__________:Whowillberesponsiblewhentheydosomethingwrong?Manufacturers?Users?Softwarewriters?Theanswerdependsontherobot.Robotsalreadysaveustime,moneyandenergy.Inthefuture,theywillimproveourhealthcare,socialwelfareandstandardofliving.The27__________ofcomputationalpowerandengineeringadvanceswill28__________enablelower-costin-homecareforthedisabled,29__________useofdriverlesscarsthatmayreducedrunk-anddistracted-drivingaccidentsandcountlesshomeandservice-industryusesforrobots,fromstreetcleaningtofoodpreparation.Butthereare30__________tobeproblems.Robotcarswillcrash.Adrone(遥控飞翔器)operatorwill31__________someone'sprivacy.Aroboticlawnmowerwillrunoveraneighbor'scat.Juriessympathetictothe32__________ofmachineswillpunishentrepreneurswithcompany-crushing33__________anddamages.Whatshouldgovernmentsdotoprotectpeoplewhile34__________spaceforinnovation?Big,complicatedsystemsonwhichmuchpublicsafetydepends,likedriverlesscars,shouldbebuilt,35__________andsoldbymanufacturerswhotakeresponsibilityforensuringsafetyandareliableforaccidents.Governmentsshouldsetsafetyrequirementsandthenletinsurerspricetheriskoftherobotsbasedonthemanufacturer'sdrivingrecord,notthepassenger's.A.arisesB.ascendsC.boundD.combinationE.definiteF.eventuallyG.interfereH.invadeI.manifestingJ.penaltiesK.preservingL.programmedM.proximatelyN.victimsO.widespread阅读参照答案26[A]空格位于句末，前面是副词naturally和主语thequestion,所以应填入不及物动词，充任句子谓语。由As从句中takeon所用的一般此刻时，可知填入的动词应是第三人称单数。上文提到人们害怕机器人缺乏道德界线(withoutamoralcompass),空格后是详细的问题，所以本句应表示问题自然“出现，惹起〞，故arises符合要求。另一个第三人称单数动词是ascends“上涨；登攀〞，与question搭配不妥。227[D]由空格前的the和空格后的of可知此填入名。介of后是两个并列的名构：computationalpower“算能力〞和engineeringadvances“工程学展〞。由此可著名中combination“合体〞切合。28[F]空格位于助will和enable之，故填入副。本句表示某物能降低残疾人的家庭理用。副中切合的是eventually“于，最〞。29[O]空格在名use之前，故填入形空或分。本句的构是...useofdriverlesscarsandcountless...usesforrobots,所以填入的与countless“无数的〞有关，指运用得“多〞或“广〞，故填入widespread“宽泛的，广泛的〞指，机器人最将广泛运用在无人汽、家用和服等方面。30[C]空格填入分或形容，构成be...to的搭配。上文提到机器人最会广泛运用，本句用but折，提到problems“〞，接着下文列了详细的，所以空格填入bound“必定的，必定的〞，指“肯定会有〞。31[H]空格前的will说明此填入及物原形，与后边的名privacy“私〞构成搭配。invade“入侵，入侵〞切合要求，指无人机可能会“入侵〞人的私。32[N]空格在the和of之，故填入名。本句指陪机器的⋯⋯表示怜悯，会企家遇到。上文机器人会生碰撞，无人机入侵私，机器人割草机居家的猫。些都是机器的“受害者〞，故victims“受害人，牲品〞切合。33[J]空格前的company-crushing是复合形容，表示“令企业力大的，可摧企业的〞，故填入与damages“金〞并列的名，形式上也是复数，作punish的接。故penalties“金〞切合要求。34[K]空格前的while是，故填入名形式。由space“空〞可，知搭配适合的是preserving“保，保留〞，句子意：政府在新“保留〞空，做些什么来保人呢？35[L]空格与去分built和sold并列，故也是表被的去分形式。本句指大型复系(systems)由厂商建⋯⋯并售。切合、并与systems搭配的是programmed“划〞。CET6-cloze-2021-6-3Questions26to35arebasedonthefollowingpassage.Pursuingacareerisanessentialpartofadolescentdevelopment."Theadolescentbecomesanadultwhenhe26__________arealjob."TocognitiveresearcherslikePiaget,adulthoodmeantthebeginningofan27__________.Piagetarguedthatonceadolescentsentertheworldofwork,theirnewlyacquiredabilitytoformhypothesesallowsthemtocreaterepresentationsthataretooideal.The28__________ofsuchideals,withoutthetemperingoftherealityofajoborprofession,rapidlyleadsadolescentstobecome29__________ofthenon-idealisticworldandtopressforreforminacharacteristicallyadolescentway.Piagetsaid:"Trueadaptationtosocietycomes30__________whentheadolescentreformerattemptstoputhisideastowork."Ofcourse,youthfulidealismisoftencourageous,andnoonelikestogiveupdreams.Perhaps,taken31__________outofcontext,Piaget'sstatementseemsharsh.Whathewas32__________,however,isthewayrealitycanmodifyidealisticviews.Somepeoplerefertosuchmodificationasmaturity.Piagetarguedthatattainingandacceptingavocationisoneofthebestwaystomodifyidealizedviewsandtomature.Ascareersandvocationsbecomelessavailableduringtimesof33__________,adolescentsmaybeespeciallyhardhit.Suchdifficulteconomictimesmayleavemanyadolescents34__________abouttheirrolesinsociety.Forthisreason,communityinterventionsandgovernmentjobprogramsthat3offersummerandvacationworkarenotonlyeconomically__35__butalsohelptostimulatetheadolescent'ssenseofworth.A.automaticallyB.beneficialC.capturingD.confusedE.emphasizingF.entranceG.excitedH.existenceI.incidentallyJ.intolerantK.occupationL.promisesM.recessionN.slightlyO.undertakes阅读参照答案26[O]空格所在句子为when指引的时间状语从句，从句中缺乏谓语动词，且依据主句中谓语动词becomes可进一步确立此处应填入动词的第三人称单数。宾语是arealjob,undertakes“承担;从事〞切合语境，句子表示从事一份真实的工作时，他〔她〕才真实步人成年人的队列。而promises“许诺〞不切合语义逻辑。27[K]空格前面的不定冠词an决定了此处应填入一个首发音是元音的名词。上句提到，青少年真实步入成年人队列是当他从事一份真实的工作时，也就是说成年意味着一份职业的开始,故填入occupation“职业〞适合。28[H]空格前面的the和后边的of决定了此处应填入名词，和后边的ofsuchideals搭配。existence“存在〞切合语义逻辑，表示这些理想的存在。29[J]空格前面是动词become,可判断此处应填入形容词或名词。前面提到青少年会产生一些过于理想化的想法，那么关于这个不那么理想的世界应当是“接受不了〞或“难以忍耐的〞，故填intolerant“没法忍耐的〞。30[A]空格位于动词comes以后，when指引的状语从句以前，所在句子不缺乏主要成分，可判断此处需要填入副词。从逻辑上推测，当青少年改革者试图将他的想法付诸工作实践时，对社会的真实适应就是自但是然的了，故automatically“自动地；自但是然地〞切合语境。31[N]空格所在局部为一个固定短语take...outofcontext,意为“断章取义，离开上下文〞其，中take的宾语应是句子的主语Piaget'sstatement,所以该过去分词短语在句子中作状语，且不缺乏主要成分，由此可判断此处需要填入一个副词。本句要说明在什么状况下，皮亚杰的论断也许太甚苛刻，填入slightly“稍微地〞适合，意为“略加孤立地看〞。32[E]空格所在局部为what指引的主语从句，从句缺乏谓语动词，由前面的助动词was可判断此处应填入动词的此刻分词形式,本句的表语是theway“那种方式〞。emphasizing“重申〞切合语境，表示他意在重申的是那种方式。33[M]空格前面的of决定了此处应填入名词或动名词形式。就业岗位愈来愈少，所以应当是处于冷清时期，且依据下文difficulteconomictimes也可判断出recession“衰败〞切合语义逻辑。34[D]空格所在局部为“leavesb.+宾语补足语〞构造，空格填入的单词作leave的宾补，且能与后边的about搭配，可判断此处应填入形容词或动词的分词形式。处于这样的经济困难时期，好多青少年也许对他们在社会中饰演的角色应当是“迷惑〞或“疑惑〞的，词库中切合这一语义的是confused“疑惑的；杂乱的〞。35[B]空格所在句子缺乏谓语，由前面的助动词are可判断此处应填入形容词或动词的分词形式。依据主语communityinterventionsandgovernmentjobprograms和空格前的economically,可知填入beneficial“有利的〞，表示社区干涉和政府供给的就业方案不单使青少年在经济上受益。CET6-cloze-2021-12-14Questions26to35arebasedonthefollowingpassage.Itisimportantthatscientistsbeseenasnormalpeopleaskingandansweringimportantquestions.Good,soundsciencedependson26,experimentsandreasonedmethodologies.Itrequiresawillingnesstoasknewquestionsandtrynewapproaches.Itrequiresonetotakerisksandexperiencefailures.Butgoodsciencealsorequires27understanding,clearexplanationandconcisepresentation.Ourcountryneedsmorescientistswhoarewillingtostepoutinthepublic28andoffertheiropinionsonimportantmatters.Weneedmorescientistswhocanexplainwhattheyaredoinginlanguagethatis29andunderstandabletothepublic.Thoseofuswhoarenotscientistsshouldalsobepreparedtosupportpublicengagementbyscientists,andto30scientificknowledgeintoourpubliccommunications.Toomanypeopleinthiscountry,includingsomeamongourelectedleadership,stilldonotunderstandhowscienceworksorwhyrobust,long-rangeinvestmentsinresearchvitallymatter.Inthe1960s,theUnitedStates31nearly17%ofdiscretionary(可酌情支配的)spendingtoresearchanddevelopment,32decadesofeconomicgrowth.By2021,thefigurehadfallenintothesingle33Thisoccursatatimewhenothernationshavemadesignificantgainsintheirownresearchcapabilities.AttheUniversityofCalifornia(UC),we34ourselvesnotonlyonthequalityofourresearch,butalsoonitscontributiontoimprovingourworld.To35thedevelopmentofsciencefromthelabbenchtothemarketplace,UCisinvestingourownmoneyinourowngoodideas.A.ArenaB.contextualC.ConvincingD.devotedE.DigitsF.hastenG.HypothesesH.impairingI.IncorporateJ.indefiniteK.IndulgeL.inertiaM.PrideN.reapingO.Warrant名：A.arena舞台，技；数字；假；性，惰性；授，授令：献身于，把⋯⋯用于；F.hasten加快；害；归并，使并入；放，使沉迷于；以⋯⋯豪；收形容：上下文的，情境的，前后关的；有服力的，令人服气的；不确立的26．G.hypotheses。27．B.contextual。28．A.arena。空格位于形容以后，据此判断可填入名，并与public用构成固定搭配。故推句意“我的国家需要更多科学家登上公共舞台〞。所以填入A.arena“舞台，技〞。在中，digitS意5“数字〞，inertia意“性，惰性〞，warrant意“授，授令〞，均不切合文意，且不可以与public搭配，故清除。29．。空格位于以that引的定从句中，此定从句使用了主系表构，据此判断填入形容，且此形容能够用来修language“言〞。依据句意“他能用令人服气而且人听得懂的言，民众解自己的所作所〞可知，答案“有服力的，令人服气的〞。在中，indefinite意“不确立的〞，与文意相反，故清除。30．。31．D.devoted。32．N.reaping。空格位于句子的主体构以外，描述主句所引的果，属于果状成分，据此判断可填人在分。依据句意“美国将大17％的可支配收入用于科学研究，________了数十年的增〞可知，答案“收〞。在中，impairing意“害〞，不切合文意，故清除。33．E.digits。34．M.pride。空格位于句子的，且此能与on构成固定搭配，中只有以“⋯⋯豪〞，切合法要求。所在旬意“我不我的科研量骄傲，也我的科研改世界所做出的献骄傲〞。在中，hasten意“加快〞，indulge意“放，使沉迷于〞，均与文意不符，故清除。35．F.hasten。CET6-cloze-2021-12-2CET6-cloze-2021-12-3CET6-cloze-2021-6-1Let’sallstopjudgingpeoplewhotalktothemselves.Newresearchsaysthatthosewhocan’seemtokeeptheirinnermonologues(独白)inareactuallymorelikelytostayontask,remain__26__betterandshowimprovedperceptioncapabilities.Notbad,really,forsomeextramuttering.AccordingtoaseriesofexperimentspublishedintheQuarterlyJournalofExperimentalPsychologybyprofessorsGaryLupyanandDanielSwignley,theactofusingverbalcluesto__27__mentalpictureshelpspeoplefunctionquicker.Inoneexperiment,theyshowedpicturesofvariousobjectstotwenty__28__andaskedthemtofindjustoneofthose,abanana.Halfwere__29__torepeatoutloudwhattheywerelookingforandtheotherhalfkepttheirlips__30__.Thosewhotalkedtothemselvesfoundthebananaslightlyfasterthanthosewhodidn，the’ｔresearcherssay.Inotherexperiments,LupyanandSwignleyfoundthat__31__thenameofacommonproductwhenonthehuntforithelpedquickensomeone’stalkingaboutuncommonitemsshowednoadvantageandslowedyoudown.Commonresearchhaslongheldthattalkingthemselvesthroughataskhelpschildrenlearn,althoughdoingsowhenyou’ve__32__maturedisnotagreatsignof__33__.Thetwoprofessorshopetorefutethatidea,__34__thatjustaswhenkidswalkthemselvesthroughaprocess,adultscanbenefitfromusinglanguagenotjusttocommunicate,butalsotohelp“augmentthinking6Ofcourse,youarestillencouragedtokeepthetalkingatlibrarytonesand,whateveryoudo,keeptheinformationyousharesimple,likeagrocerylist.Atany__35__,there’sstillsuctoomuchinformation.【分析】F。空格前的remain系，所以空格需要填入一个形容；依据前面的句意“⋯⋯更有可能持做一件事〞，可知focused最切合，表示“保持全神注〞，所以本F。27.【分析】L。依据空格前的to可判断空格填入原形，依据句意，“使用口提示来像〞，可知L切合。28.【分析】0。空格前是量twenty，所以空格需填入一个名复数；再由前的“Inoneexperiment可〞知是一个，所以里volunteers〔志愿者〕最适合，故本0。【分析】H。空格前后分bewere和介to，所以空格需要填入一个的被；依据句意，“一半人被_____要高声地重复他要找的西，〞可知instructed〔通知，指〕最适合，所以本答案H。30.【分析】J。依据句子构可判断空格需要填入一个形容。再由theotherhalf的是前的Half，可知里的状况和前的不一样，前repeatoutloud〔高声地重复〕，后自然就是要表达“不〞的意思，keepone’slipssealed即“上嘴巴、不〞的意思，故本J。31.【分析】M。空格前的that引的是从句，空格与后边的名thenameofacommonproduct共同充任从句的主，所以空格填入的-ing形式，依据句意可判断uttering更适合，故本M。32.【分析】A。空格所在句是一个在达成，空格前后成havematured，所以空格上其实不缺成分，只可能填入一个副来修matured，依据意思，里apparently。【分析】C。依据空格前的agreatsignof可知，空格缺乏一个名；再依据句意，“当你足成熟，自言自其实不可以示出你的_____〞，可知里填入brilliance更适合。故本C。34.【分析】D。空格前是一句完好的，空格后是that从句，由此判断空格填入的-ing形式，作前句子的陪伴状，并引后边的从句；剖析，的-ing形式只剩下claiming一个，故本D。35.【分析】N。空格需要填入一个名，与前的Atany构成介；合整篇文章的粗心，此填入volume最适合，故本N。2021年6月六考真(第2套)CET6-cloze-2021-6-2AfterbecomingpresidentofPurdueUniversityin2021,MitchDanielsaskedthefacultytoprove7thattheirstudentshaveactuallyachievedoneofhighereducation’smostimportantgoalthinkingskills.Twoyearsbefore,anationwidestudyofcollegegraduateshadshownthatmorethanathirdhadmadeno26gainsinsuchmentalabilitiesduringtheirschoolyears.Mr.Danielsneededto27thehighcostofattendingPurduetoitsstudentsandtheirfamilies.Afterall,thepercentageofAmericanswhosayacollegedegreeis“veryimportant〞hashefallenlast285-6inyearst.Purduenowhasapilottesttoassessstudentscritical’thinkingskills.YetlikemanycollegeteachersaroundtheU.S.,thefacultyremain29thattheirworkaseducatorscanbemeasuredbya“learning30〞suchasagraduate’tosinvestigateabilityandreason.However,theprofessorsneednotworrysomuch.Theresultsofarecentexperimentshowedthatprofessorscanuse31metricstomeasurehowwellstudentsdointhreekeyareas:criticalthinking,writtencommunication,andquantitativeliteracy.Despitethesuccessoftheexperiment,theactualresultsareworrisome,andmostly32earlierstudies.Theorganizersoftheexperimentconcludedthatfarfewerstudentswereachievingathighlevelsoncriticalthinkingthantheyweredoingforwrittencommunicationorquantitativeliteracy.Andthatconclusionisbasedonlyonstudentsnearinggraduation.Americanuniversities,despitetheirglobal33forexcellenceinteaching,haveonlybeguntodemonstratewhattheycanproduceinreal-worldlearning.Knowledge-baseddegreesarestillimportant,butemployersare34advancedthinkingskillsfromcollegegraduates.Iftheintellectualworthofacollegedegreecanbe35measured,morepeoplewillseekhighereducation---andcomeoutbetterthinkers.A)accuratelyB)confirmC)demandingD)doubtfulE)drasticallyF)justifyG)monopolizedH)outcomeI)predominanceJ)presumingK)reputationL)significantM)signifyN)simultaneouslyO)standardized26.【分析】L。空格前是形容词no,空格后是名词gains，所以此空应当填入一个形容词。依据句意，选项中只有significant切合句意。havemadenosignificantgains意为“未能获得明显提高〞。应选L。27.【分析】F。空格前是不定式to，空格后是名词词组thehighcost,所以此空应当填入一个动词原形。依据句意，动词原形中只有justify切合句意。应选F。28.【分析】E。空格前是hasfallen，空格后是时间状语inthelast5-6years，本句是此刻达成时且不缺句子成分，所以此空应当填入一个副词。依据句意，选项中只有drastically符合句意。应选E。29.【分析】D。空格前是动词remain，空格后是that指引的表语从句，所以此空应当填入一个形容词。依据句意，选项中只有doubtful切合句意。应选D。30【.分析】H。双引号前是不定冠词a，所以此空应填入一个名词。依据句意，选项中只有outcome切合句意。应选H。831.【分析】O。空格前是动词use，空格后是名词metrics，所以此空应当填入一个形容词或名词。依据句意，选项中只有standardized切合句意。应选O。32.【分析】B。空格前是副词mostly，空格后是名词词组earlierstudies，由空格所在小分句开头的and以及本句主语theactualresults可知，此空应当填入一个动词原形。根据句意，选项中只有confirm切合句意。应选B。33.【分析】K。空格前是形容词global，空格后是介词调组forexcellenceinteaching，所以此空应当填入一个名词。依据句意，选项中只有reputation切合句意。应选K。34.【分析】C。空格前是系动词are,空格后是名词词组advancedthinkingskills,所以此空应当填入一个动词，构成此刻进行时。依据句意，“鉴于知识的学位仍旧很重要，但雇主要求大学毕业生具备较强的思想能力。〞选项中只有demanding(要求；盘问〕切合句意。demandfrom为固定搭配，意为“向要求〞。应选C。35.【分析】A。空格前是系动词be，空格后是动词的被动语态measured，所以此空应该填入一个副词，以修饰measured。依据句意，选项中只有accurately切合句意。应选A。CET6-cloze-2021-6-32021年6月六级考试真题(第3套)Halfofyourbrainstaysalertandpreparedfordangerwhenyousleepinanewplace,astudyhasrevealed.Thisphenomenonisoften26toasthe“-nightfirst-effect〞.ResearchersfromBrownUniversityfoundthatanetworkinthelefthemisphereofthebrain“remainedmoreactnetworkintherightsideofthebrain.Playingsoundsintotherightears(stimulatingthelefthemisphere)of27wasmorelikelytowakethemupthanifthenoiseswereplayedintotheirleftear.Itwas28observedthattheleftsideofthebrainwasmoreactiveduringdeepsleep.Whentheresearchersrepeatedthelaboratoryexperimentonthesecondandthirdnightstheyfoundthelefthemispherecouldnotbestimulatedinthesamewayduringdeepsleep.Theresearchersexplainedthatthestudydemonstratedwhenweareina29environmentthebrainpartlyremainsalertsothathumanscandefendthemselvesagainstany30danger.Theresearchersbelievethisisthefirsttimethatthe-night-effect〞“ofirstdifferentbrainstateshasbeen31inhumans.Itisn’t,however,thefirsttimeithaseverbeenseen.Someanimal32alsodisplaythisphenomenon.Forexample,dolphins,aswellasother33animals,shutdownonehemisphereofthebrainwhentheygotosleep.Apreviousstudynotedthatdolphinsalways34controltheirbreathing.Withoutkeepingthebrainactivewhilesleeping,theywouldprobablydrown.But,asthehumanstudysuggest,anotherreasonfordolphinskeepingtheireyesopenduringsleepisthattheycanlookoutfor35whileasleep.Italsokeepstheirphysiologicalprocessesworking.classifiedB)consciouslyC)dramaticallyD)exoticE)identifiedinherentG)marineH)novelI)potentialJ)predatorsreferredL)speciesM)specificallyN)varietiesO)volunteers926.【分析】K。空格前是系动词is和副词often，空格后是不定式to，所以此空应当填入一个形容词或许动词的-ed形式。选项referred切合句意。bereferredtoas为固定搭配，意为“被称为〞。应选K。27.【分析】O。空格前是名词词组therightears和介词of，空格后是系动词was，所以此空应当填入一个表示人的名词，表示所属关系。选项volunteers切合句意。应选O。28.【分析】M。空格前是系动词was，空格后是动词的-ed形式observed，所以此空应该填入一个副词，修饰observed。选项specifically切合。应选M。29.【分析】H。空格前是不定冠词a；空格后是名词environment，所以此空应当填入一个形容词。选项novel切合句意。应选H。30.【分析】I。空格前是代词any，空格后是名词danger，所以此空应当填入一个形容词。选项potential切合句意。应选I。31.【分析】E。空格前是此刻达成时的标记词hasbeen，空格后是介词词组inhumans，所以此空应当填入一个动词的-ed形式。选项identified切合句意。应选E。32【.分析】L。空格前是名词animal，空格后是副词a