英语六级阅读训练

英语六级阅读训练●The"standardofliving"ofanycountrymeanstheaverageperson'sshareofthegoodsandserviceswhichthecountryproduces.Acountry'sstandardofliving,therefore,dependsfirstandforemostonitscapacitytoproducewealth."Wealth"inthissenseisnotmoney,forwedonotliveonmoneybutonthingsthatmoneycanbuy:"goods"suchasfoodandclothing,and"services"suchastransportandentertainment.Acountry'scapacitytoproducewealthdependsuponmanyfactors,mostofwhichhaveaneffectononeanother.Wealthdependstoagreatextentuponacountry'snaturalresources,suchascoal,gold,andotherminerals,watersupplyandsoon.Someregionsoftheworldarewellsuppliedwithcoalandminerals,andhaveafertilesoilandafavorableclimate;otherregionspossessperhapsonlyoneofthesethings,andsomeregionspossessnoneofthem.TheU.S.Aisoneofthewealthiestregionsoftheworldbecauseshehasvastnaturalresourceswithinherborders,hersoilisfertile,andherclimateisvaried.TheSaharaDesert,ontheotherhand,isoneoftheleastwealthy.Nexttonaturalresourcescomestheabilitytoturnthemtouse.ChinaisperhapsaswelloffastheU.S.A.innaturalresources,butsufferedformanyyearsfromcivilandexternalwars,andforthisandotherreasonswas.unabletodevelopherresources.Soundandstablepoliticalconditions,andfreedomfromforeigninvasion,enableacountrytodevelopitsnaturalresourcespeacefullyandsteadily,andtoproducemorewealththananothercountryequallywellservedbynaturebutlesswellordered.Anotherimportantfactoristhetechnicalefficiencyofacountry'speople.Oldcountriesthathave,throughmanycenturies,trainedupnumerousskilledcraftsmenandtechniciansarebetterplacedtoproducewealththancountrieswhoseworkersarelargelyunskilled.Wealthalsoproduceswealth.Asacountrybecomeswealthier,itspeoplehavealargemarginforsaving,andcanputtheirsavingsintofactoriesandmachineswhichwillhelpworkerstoturnoutmoregoodsintheirworkingday.1.Acountry'swealthdependsupon______.,A.itsstandardoflivingB.itsmoneyC.itsabilitytoprovidegoodsandservicesD.itsabilitytoprovidetransportandentertainment2.Theword"foremost"means______.A.mostimportantlyB.firstlyC.largelyD.forthemostpart3.Themainideaofthesecondparagraphisthat______.A.acountry'swealthdependsonmanyfactorsB.theU.S.A.isoneofthewealthiestcountriesintheworldC.theSaharaDesertisaverypoorregionD.naturalresourcesareanimportantfactorinthewealthorpovertyofacountry4.Thethirdparagraphmentionssomeoftheadvantageswhichonecountrymayhaveoveranotherinmakinguseofitsresources.Howmanysuchadvantagesarementionedinthisparagraph?A.2B.3C.4D.55.Thesecondsentence.inParagraph3is______.A.themainideaoftheparagraphB.anexamplesupportingthemainideaoftheparagraphC.theconclusionoftheparagraphD.notrelatedtotheparagraph1.C2.A3.A4.B5.B●TheproductivityofAmericansemployedinprivatebusinesseshasdeclined.TheproductivityofworkersincountriessuchasJapanandGermanyisincreasing.Americanmachinetools,onaverage,areold,relativelyinefficient,andrapidlybecomingobsolete,whereasthoseofourcompetitorsoverseas,incomparison,arenewerandmoreefficient.Wearenolongerthemostproductiveworkersintheworld.Wearenolongertheleadersinindustrialinnovation(革新).Weareanimmenselywealthynationofeducatedmenandwomenwhoseemtohavelostsightofthefactthateverything—fromthesimplestnecessitiestothefinestluxuries—mustbeproducedthroughourowncollectivehardwork.Wehavecometoexpectautomaticincreasesinourcollectivestandardofliving,butweseemtohaveforgottenthattheseincreasesarepossibleonlywhenourproductivitycontinuestogrow.Onethingthatmustchangeistherateatwhichwesubstitutecapitalequipmentforhumanlabor.Simplyput,ourlaborforcehasincreasedatafargreaterratethanhasourstockofcapitalinvestment.Weseemtohaveforgottenthatourpastproductivitygains,toalargeextent,wererealizedfromsubstitutionsofcapitalforhumanlabor.Today,3timesasmanyrobotsarelistedascapitalassetsbyJapanesefirmsasbyUnitedStatesfirms.ThereisnodoubtthatrobotswillbecomeacommonsightinAmericanfactories.Representinganewgenerationoftechnology,robotswillreplacefactorylabormuchasthefarmtractorreplacedthehorse.Robottechnologyhasmuchtooffer.Itoffershigherlevelsofproductivityandqualityatlowercosts;inpromisestofreemenandwomenfromthedull,repetitioustoilofthefactory,itislikelytohaveanimpactonsocietycomparabletothatmadebythegrowthofcomputertechnology.1.Theword"obsolete"(Para.1)mostprobablymeans_______.A.weakB.oldC.newD.outofdate2.Theauthorisanxiousabout_______.A.hispeoplenolongertakingtheleadinindustrialinnovationB.hiscountrynolongerbeingawealthynationC.hispeopleforgettingtoraisetheirproductivityD.hiscountryfallingbehindotherindustrialnations3.Accordingtotheauthor,inhiscountry_______..A.theproportionoflaborforcetocapitalinvestmentisquitelowB.thegrowthrateoflaborforceshouldbegreaterthanthatofcapitalinvestmentC.theproductivityincreasesshouldbeachievedbytheincreasesoflaborforceD.capitalinvestmentshouldhaveincreasedmorerapidlythanlaborforce4.Sofarastheinfluenceonsocietyisconcerned,_______.A.robottechnologyseemstobemuchmorepromisingthancomputertechnologyB.computertechnologyhaslesstoofferthanrobottechnologyC.robottechnologycanbecomparedwithcomputertechnologyD.robottechnologycannotbecomparedwithcomputertechnology5.Thepurposeoftheauthorinwritingthispassageistoshowthat_______.A.robotswillhelpincreaselaborproductivityB.robotswillruleAmericanfactoriesC.robotsarecheaperthanhumanlaborersD.robotswillfinallyreplacehumansinfactories1.D2.C3.D4.C5.A4.Itisdifficulttoimprovetheproceduresforfixingwagelevelsbecause______.A.someindustrieshavenounionsB.unionsarenotorganizedaccordingtoindustriesC.only55percentofworkersbelongtounionsD.someunionsaretoopowerful5.WhichofthefollowingisNOTTRUE?A.Therearestrainsandtensionsinthetradeunionmovement.B.Someunionshavelostmanymembers.C.Someunionsexistintheoutdatedstructure.D.AhigherpercentageofAmericanworkersbelongtounionsthanthatofBritishworkers.1.A2.A3.C4.B5.D●It'sahotsummerday,andyou,yourfamily,andfriendsdecidetodrivetothebeachforacookout.Whenyougettothebeach,thesandandtherocksaresohotthattheyhurtyourbarefeet.Youputonsneakersinahurry.Thewaterissobrightandshininginthesunthatyoucanhardlylookatit.Whilethecharcoal(木炭)fireisstartingtoburninthecookoutstove,everyonegoesforaswim.Thewaterfeelsgood—warmatthetop,butcoolerdownaroundyourtoes.Alittlewindisblowingwhenyoucomeout.Thefireisn'tquitereadyforcookingyet,soyouplaytag(儿童捉人游戏)orread.Forlunchtherearehotdog,corn,saladandrolls,sodas,fruit,andcoffeefortheadults.Bythetimethecoffeewaterboilsandthecornandhotdogsarecooked,allthebathingsuitsaredry.Soarethetowelsspreadoutontherocks,inthesun.Lunchisgood.Justasyouarefinishing,itstartstorainsoyoupackupandrun.Butnobodymindstherain.Itwillcoolthingsoff.Atthesametimeyouwerehavingfunatthebeach,workwasbeingdone.Energyfromthesunwasdoingwork.Energy,inoneformoranother,doesalltheworkintheworld.Heatenergyfromthesundriedthetowels.Itheatedthesandandtherocks,thewaterandtheair.Itevenmadetherainandthewind.Heatfromthesundoessmallworkandbigwork,allovertheearth.Lightenergyfromthesunwasworkingonthebeachtoo.Itsuppliedthedaylight.Itlittheearthandmadethesandbrightandthewatersparkling.Thesunalsosuppliedtheenergythatgrewthefoodyouate.Plantsuselightenergyfromthesuntomakefoodforthemselves.Thefoodisakindofsugar.Itisalsoakindofenergycalledchemicalenergy.Greenplantschangelightenergyfromthesunintochemicalenergy.Plantsusesomeofthatenergyforeverydaylivingandgrowing.Theystoretherestintheirleavesandseeds,infruit,roots,stems,andberries.Thesaladandthecorn,therolls,fruit,andcoffeeallcamefromplants.Youandallanimalsdependonplantsforfood.Thecharcoalyouusedforcookingbeganasaplanttoo.Once,thatcharcoalwasalivingtreethatusedsunlighttomakefoodandthenstoredpartofthefooditmade.Theenergyinthisstoredfoodremained,evenafterthetreedied.Youusedthatenergywhenyouburnedthecharcoal.Thegasolineyouusedfordrivingtothebeachbeganwithenergyfromthesun,too.Itwasmadefromoil.Oilwasformedfromtheremainsofplantsandanimalsthatlivedonearthmillionsofyearsago.Theremainsofancientlivingthingsarecalledfossils.Thisiswhyoiliscalledafossilfuel.Coalandnaturalgasarefossilfuels,too.Nowfossilfuelsarebeginningtobeusedup.That'swhypeopleworryaboutrunningoutofenergy.Butaslongasthesunshines,theearthwillnotrunoutofenergy.Thesunpoursmoreenergyonearththanwecaneveruse.Mostofthatenergycomestousasheatandlight.Energyfromthesuniscalledsolarenergy.Solarenergyisasafekindofenergy.Itdoesn'tmakepollutionorhavedangerousleftovers.Thatiswhyscientistsandinventorsareexperimentingwithwaysofharnessingthesuntodosomeofthejobsfossilfuelshavebeendoing.Buttomakethesundoworklikethat,theyhavetosolvesomeproblems.Theyhavetocollectthesun'senergy.Collectingsunshineisn'teasy,unlessyouareaplant.Sunshineisn'teasytostore,either.Youcan'tfillatankwithitorputitinthewoodbox.Youcan'tmoveitthroughapipeorawire.Youcan'tturniton.Still,peoplehavebeenusingsolarenergytohelpdotheirworkforalongtime.Thereareoldwaysandnewwaysofcatchingsunshineandputtingittowork.Supposeyouwerelivinginacoldplaceandgoingtospendthewinterinacave.Wouldyouchooseacavethatfacedthewintersunoracavethatfacedawayfromit?Youmightmakethesamechoiceifyouwerebuildingahouseinacoldplace.Youwouldprobablybuildthehouse,sothewintersunwouldpourinthewindowstowarmit.Peoplehavebeenbuildinghousesthatwayforalongtime.Isitpossibletocatchstillmoreofthesun'sheatinahouse?Yes,Somehousesalsocollectheatontheroof,moveitindoors,storesome,usesometomakehotwaterandtherestforheating.Ahouselikethatiscalledasolarhouse.Peoplewhobuildsolarhouseshavelearnedhowtodothosethingsbyobservinghowtheearthitselfusessolarenergy.Rememberthebeach?Rememberthehotsandandthehotrocks?Somematerialstakeinheatenergyfromthesunandholdit.Theyabsorbtheheat.Sandandrocksdothis.Sodosomeothersolidmaterials,suchasmetals.Waterabsorbsthesun'sheattoo.Colorcanalsobeimportant.Dark,dullcolorsabsorbheat.Light-colored,shinysurfacesreflectheat.Theybounceitback.That'swhydarkclothesarewarmerinthewinterandlightcoloredclothesarecoolerinthesummer.Thelongerittakessomethingtoheatup,thelongerthatthingholdstheheat.Materialsthatheatupfastcoolofffast.Ifyougobacktothebeachintheeveningaftersunset,thesandandtherocks,whichheatedupfast,willbecool.Butthewater,whichheatedupslowly,willstillbewarm.Ittakesalongtimeforthesuntoheatthewaterinabiglakeorocean.Butbytheendofsummer,alargebodyofwaterwillhavecaughtandstoredenoughheatfromthesuntolastforagoodpartofthewinter.Waterstoresheatverywell.That'swhylandnearalargebodyofwaternevergetsquiteascoldinthewinteraslandfarawayfromthewater.Thestoredheatinthewaterkeepsthelandarounditwarm.Slowly,allwinterlong,heatfromthewatermovesoutintothecoldair.Heatalwaysmovesthatway—fromawarmerplaceorthingtoacoolerone.Onceyouknowwhichwayheatmoves,youunderstandhowthingsgethotandhowtheyloseheat.1.Alltheworkintheworldisdonebyenergycomingfromthesuninoneformoranother.2.Aswehumansdependonplantsforfood,plantsliveonchemicalenergyconvertedfromlightenergy.3.Unlessthesundies,itwillsupplyendlessenergyonearth.4.Ithasbeenalongtimesincepeoplebegantousesolarenergybecausesunshinecanbestoredinhouses.5.Theadvantageofthesolarhouseisthatithashotwaterandheating.6.Asolarhousedoesn'thavetouseelectricitywhenitmakesagooduseofsolarenergy.7.Thepassagegivesabriefaccountofhowsolarenergyisemployed.8.Wecanunderstandhowthingsgethotorloseheataslongasweknow______.9.Mostoftheenergythesunsuppliestousisintheformsof______.10.Peopleliketousefossilfuelstogetalmostallkindsofenergybecausetheyare______.I.Y2.Y3.Y4.N5.N6.NG7.N8.whichwayheatmoves9.heatandlight10.easytouse●Ihaveneverattendedalargecompany'sboardmeetinginmylife,butIfeelcertainthatthediscussionoftentakesthefollowinglines.The__1__ofproducinganew—forexample—toothpastewouldmake8Opthedecentpriceforit,sowewillmarketitat£l.20.Itisnotabadtoothpaste(notspeciallygoodeither,butnotbad),andaspeopleliketotrynewthingsitwillsellwelltostartwith;butthe__2__ofnoveltysoonfades,sosaleswill__3__.Whenthatstartstohappenwewillreducethepriceto£l.15.Andwewillturnitintoabargainbyprinting5pOFFalloverit,whereuponpeoplewillrushtobuyiteventhoughitstillcostsaboutforty-threepercentmorethanits__4__price.Sometimesitisnot5pOFFbutlpOFF.WhatashametoadvertiselpOFFyoursoaporwashingpowderordogfoodorwhatever.Eventhepoorestold-agepensioneroughttoregardthisasaninsult,buthedoesn't.Abargainmustnotbe__5__Tobeoffereda"gift"ofonepennyislikebeinginvitedtodinnerandofferedonesinglepea(tastilycooked),andnothingelse.Evenifitrepresenteda__6__reductionitwouldbeaninsult.Still,peoplesay,onehastohavewashingpowder(orwhatever)andonemightaswellbuyitapennycheaper.WhenIwasaboyinHungaryamanwas__7__ofmurderingsome¬oneforthesakeofonepengo,theequivalentofashilling,andpleaded__8__Thejudgeshouted__9__:"Tokillamanforashilling!Whatcanyousayinyour__10__?"Themurdererreplied:"Ashillinghere...ashillingthere..."Andthat'swhattoday'sshoppersays,too:"Apennyhere...apennythere..."A.missedB.defenseC.realD.costE.anxiouslyF.attractionG.fairH.expenseI.fallJ.angrilyK.dismissedL.accusedM.guiltyN.faultyO.securityI.D2.F3.I4.G5.A6.C7.L8.M9.J●Althoughcreditcardsarebecomingamoreacceptablepartofthefinancialscene,theyarestillregardedwithsuspicionbymanyasbeingamajorpartofthe"livenowpaylater"syndrome(^Jttt).Alongwithhire-purchase,rentalandleasingschemes,theyprovideencouragementtospendmoremoney.Ofcourse,itisonlythefoolhardywhoyieldtothetemptationtolive,temporarilyatleast,beyondtheirmeans,andsuchpeoplewouldnodoubtmanagetodosoevenwithoutcreditcards.Advertisingcampaignshave,however,promotedagrowingrealizationoftheadvantagesofthesesmallpiecesofplastic.Theyobviate(避免)needtocarrylargeamountsofcashandarealwaysusefulinemergencies.Allthecreditcardorganizationschargeinterestonamonthlybasiswhichmayworkoutashighas25percentayear,yetjudiciouspurchasingusingacardcanmeanthatyouobtainuptosevenweeks,interest-freecredit.Usingthecardabroad,whereitemsfrequentlytakealongtimetobeincludedonyouraccount,canextendthisperiodevenfurther.Itisworthwhileshoppingaroundbeforedecidingonaparticularcreditcard.Itisnecessarytoconsidertheamountofcreditgranted;interestrates,whichmayvaryslightly;thenumberandrangeofoutlets,thoughmostcardscovermajorgarages,hotels,restaurantsanddepartmentstores;andofcourse,whathappensifyourcardislostorstolen.Acreditcardthiefmaybesittingonapotentialgoldmineparticularlyifthereisadelayinreportingthelossofthecard.However,ifusedwisely,acreditcardcancostnothing,oratleasthelptotideyouoveraperiodoffinancialdifficulty.26.Whichofthefollowingcannotmakeyouspendmoremoney?A.Creditcards.B.Hire-purchase.C.Rentalandleasingschemes.D.Noneoftheaboveisright.27.Thefoolhardyarepeoplewho_______.A.spendmoremoneythantheyhaveB.spendlessmoneythanotherpeopleC.savemoneyD.makemoney28.Thedisadvantageofcreditcardsis_______.A.toenableyoutobuythingswithoutcarryinglargeamountofcashB.toencouragepeopletospendmoremoneyC.tobealwaysusefulinemergenciesD.tohelppeopletideoveraperiodoffinancialdifficulty29.Accordingtothepassage,creditcardsaremadeof_______.A.paperB.goldC.plasticD.tin30.Decidingonaparticularcredit,youdonothavetoconsider______.A.theamountofcreditgrantedB.thenumberandrangeofoutletsC.thepossibilityoflossofmoneyD.thedepartmentstoreswhereyouaregoingtouseyourcreditcards26.D27.A28.B29.D30.CMoreattentionwaspaidtothequalityofproductioninFranceatthetimeofReneCoty.CharlesDeschanelwasthenthefinancialminister.Hestressedthatworkmanshipandqualityweremoreimportantthanquantityforindustrialproduction.Itwouldbenecessarytoproducequalitygoodsfortheinternationalmarketstocompetewiththoseproducedinothercountries.TheFrencheconomyneededalargershareofinternationalmarkettobalanceitsimportandexporttrade.Frenchindustrialandagriculturalproductionwasstillinadequatetomeettheimmediateneedsofthepeople,letalonelong-rangeddevelopments.Essentialimportshadstretchedthenationalcredittothebreakingpoint.Rentsweretightlycontrolled,buttheextremeinflationaffectedgeneralpopulationmostseverelythroughthecostoffood.Foodcoststookasmuchas80percentoftheworker'sincome.Wages,itistrue,hadrisen.Extensivefamilyallowancesandbenefitswerepaidbythestate,andtherewasfulltimeandovertimeemployment.Takentogether,thesefactorsenabledtheworkingclasstoexistbutallowedthemnosenseofsecurity.Inthisdiscouragingsituation,workmenwerewillingtoworkoverseasforhigherwages.Thegovernmentwasunwillingtoletworkersleavethecountry.Itwasfearedthatmigrationofworkerswouldreducethelaborforce.Thelackofqualifiedworkersmighthindertheimprovementinthequalityofindustrialproductsproduced.Qualifiedworkersemployedabroadwouldonlyincreasethequantityofqualitygoodsproducedinforeigncountries.AlsothequantityofqualitygoodsproducedinFrancewouldnotbeabletoincreaseaspartofitsualifiedlaborforcemovedtoothercountries.1.Thepurposeofthepassageisto_______.A.explaintheFrenchgovernment'semphasisonqualityproductsB.discussCharlesDeschanel'scontributiontotheFrenchindustrialdevelopmentC.comparethequalityofFrenchgoodswiththatofforeigngoodsD.showFrenchworkmen'senthusiasmtoseekwell-paidjobsinforeigncountries2.ItcanbeinferredfromthepassagethatatthetimeofReneCoty.A.FrancewasstillatthefirststageofindustrialdevelopmentB.FrenchworkerswerebetterpaidthantheworkersinanyotherEuropeancountriesC.theunemploymentrateinFrancewascomparativelyhigherthanthatinotherEuropeancountriesD.Frenchworkerswereabletolivebetterwiththeincreaseintheirwages3.Itisimpliedinthepassagethatatthattime_______.A.FrancehadaverylargeshareofinternationalmarketB.theimportandexporttradeinFrancewasmakingasuccessfuladvanceC.demandandsupplyinFrancewasbarelybalancedD.Francewasexperiencingeconomicdepression4.WhichofthefollowingisthebestindicatoroftheextremeinflationinFrance?A.Eightypercentincreaseinthepricesofconsumergoods.B.Highcostoffood.C.Highrentsforhouses.D.Lackofagriculturalproducts.5.WhichofthefollowingisNOTmentionedinthepassage?A.RentsinFranceweretightlycontrolled.B.Francewasfloodingtheinternationalmarketwithinferiorproducts.C.Frenchworkerswereprohibitedfromgoingabroadtofindjobs.D.ThemigrationofFrenchworkerswouldhindertheimprovementofqualityinindustrialproduction.1.A2.A3.D4.B5.B●ScientistsatSussexUniversityappeartobeonthewayto___1___howthemosquito,carrierofdiseasessuchasmalariaandyellowfever,homesinonitstarget.Theproblemisthattheyhavefoundthatthebestwaytoavoidbeingbittenis:stopbreathing,stopsweating,andkeepdownthetemperatureofyourimmediatesurroundings.__2__thefirstsuggestionisimpossibleandtheothersverydifficult.Scientistshavefoundthattherearethree___3___stagesinamosquito'sassault.Stageoneisatfiftyfeetaway,whentheinsectfirstsmellsamanoraanimalto___4___.Stagetwoisthoughttocomeintooperationabouttwenty-fivefeetfromthetarget,whentheinsectbecomesguidedbythecarbondioxidebreathedoutbytheintendedvictim.Stagethreeiswhenthemosquitoisonlyamatterofinchesfromits___5___thewarmthandmoisturegivenoffbythevictimisthefinalclue.Theresearchersthen*___6___howrepellentsinterferewithitsthree-stageattack.Theyfoundrepellentsactmoresubtlythanbyjustgivingoffanastysmell.ACanadianresearchersaysthatrepellentsappearto___7___mosquitoesfirstwhenitisfollowingthecarbondioxideandsecondduringthefinalapproach,wherethewarmthandmoisturearetheinsect's___8___.Airpervadedbyoneofthemanychemicalrepellentsstopsthemosquitoreactingtothevictim'scarbondioxide,andtherepellentseemstoaffectthetinyhairswithwhichtheinsectsensesmoistureintheair.Thesensorsareblockedsothatthe___9___doesnotknowwhetheritisflyingthroughamoistcurrent,orthesensorsaremadetosendthe___10___signals.A.examinedB.animalC.wrongD.insectE.biteF.UnfortunatelyG.inventingH.distinctI.preyJ.guideK.checkedL.definiteM.UnnecessarilyN.confuseO.discovering1.O2.F3.H4.E5.I6.A7.N8.J9.D10.C本文转载自:[url=]英语六级考试网[/url]●Sugarlessyoghurt(酸奶)couldhelpbeatbadbreath,toothdecayandgumdisease,sayscientists.Japaneseresearchersfoundeatingtheyoghurt62levelsofhydrogensulphide(硫化氢)—amajor63ofbadbreath—in80%ofvolunteers.The64areactivebacteriainyoghurt.Detailswere65atameetingoftheInternationalAssociationforDentalResearch.A(n)66of24volunteerswhoparticipatedinthestudyweregivenstrictinstructions67oralhealth,dietandmedicinetaking.Theyspenttwoweeks68yoghurtsandsimilarfoods,likecheese.Researchersthen69bacterialevelsandodor-causingcompounds,70hydrogensulphide.Thevolunteersthenate90gramsofyoghurtadayforsixweeks.Attheendofthestudy,researcherstook71again.Theyfoundhydrogensulphidelevels72in80%ofparticipants.Dr.NigelCarter,chiefexecutiveoftheBritishDentalHealthFoundation,said:"Thefoundationhaslongbeen73people'sattentiontosugar-freeyoghurtsasahealthysnack,soitispleasingtohearthatitmayhaveoralhealthbenefitswewerepreviously74of.""Althoughthisresearchisstillintheearlystagesthereisno75thatsugar-freeyoghurtsprovideamuchhealthier76tosweetsandchocolate,andwewouldencouragesnackersto77themintotheirdiet."78,Dr.Carterstressedthatthebestwaytobeatbadbreathwasby79agoodoralhealthroutine.Thisinvolvesbrushingtwice-a-daywithfluoride(氟化物)toothpaste,cutting80onthefrequencyofsugarysnacksanddrinksandvisitingadentist81.62.[A]increased[B]required[C]averaged[D]reduced63.[A]reason[B]cause[C]result[D]origin64.[A]strategies[B]matters[C]keys[D]emergencies65.[A]presented[B]submitted[C]exposed[D]written66.[A]whole[B]unit[C]total[D]amount67.[A]with[B]of[C]to[D]on68.[A]avoiding[B]prohibiting[C]preventing[D]refusing69.[A]balanced[B]evaluated[C1measured[D]counted70.[A]involving[B]including[C]containing[D]concerning71.[A]modes[B]examples[C]copies[D]samples72.[A]grew[B1remained[C1decreased[D]risen73.[A]drawing[B]paying[C]attracting[D]concentrating74.[A]uncertain[B]unaware[C]certain[D1aware75.[A]idea[B]hesitation[C]doubt[D]sense76.[A]selection[B]alternative[C]preference[D]substitute77.[A]convene[B]affiliate[C]constrain[D]incorporate78.[A]However[B]Moreover[C]Therefore[D]Otherwise79.[A]bringing[B]adopting[C]receiving[D]adapting80.[A]off[B]backC]out[D]down81.[A]regularly[B]occasionally[C]rarely[D]normally62．【解析】选[D]。语义衔接题。本段第一句是本段的主题句，已经说明酸奶有助于防止口臭。解答本题要在63题之后。由63题可知，硫化氢是造成