2021年英语专业四级考试模拟题和答案解析

2021年英语专业四级考试模拟题和答案解析PartIDictationListentothefollowingpassage.Altogetherthepassagewillbereadtoyoufourtimes.Duringthefirstreading,whichwillbereadatnormalspeed,listenandtrytounderstandthemeaning.Forthesecondandthirdreadings,thepassagewillbereadsentencebysentence,orphrasebyphrase,withintervalsof15seconds.Thelastreadingwillbereadatnormalspeedagainandduringthistimeyoushouldcheckyourwork.Youwillthenbegiven2minutestocheckthroughyourworkoncemore.PleasewritethewholepassageonANSWERSHEETONE.TheInternetTheInternetisaglobalsystemofinterconnectedcomputernetworks.ItusesthestandardInternetprotocolsuitetoservebillionsofusersworldwide.Itisanetworkofnetworksthatconsistsofmillionsofprivate,public,academic,business,andgovernmentnetworks,oflocaltoglobalscope,thatarelinkedbyabroadarrayofelectronic,wirelessandopticalnetworkingtechnologies.TheInternetcarriesanextensiverangeofinformationresourcesandservices,suchastheinter-linkedhypertextdocumentsoftheWorldWideWeb(WWW)andtheinfrastructuretosupportemail.Mosttraditionalcommunicationsmediaincludingtelephone,music,film,andtelevisionarebeingreshapedorredefinedbytheInternet,givingbirthtonewservicessuchasInternettelephone,Internetradio,Internettelevision,andInternetmovies.Newspaperpublishersareconvertingtoanonlineformatandofferingtheircontentforfreeorforafee.AnswerandExplanation:-Spelling:Wordslike“interconnected”,“protocol”,“hypertext”needtobespelledcorrectly.Forexample,“interconnected”mightbemisspelledas“interconected”ifoneisnotcareful.Thekeyistolistencarefullytoeachsyllableduringthereading.-Punctuation:Commasareusedtoseparateitemsinalist,like“private,public,academic,business,andgovernmentnetworks”.Periodsmarktheendofsentences.Payattentiontothepausesduringthereadingtoplacethepunctuationaccurately.-Grammar:Thesentencestructureshouldbecorrect.Forinstance,“Itisanetworkofnetworksthatconsistsof...”isacomplexsentencewitharelativeclause“thatconsistsof...”.Understandingthegrammarhelpsinwritingthepassagecorrectly.PartIIListeningComprehensionSectionAConversationsInthissectionyouwillhearseveralconversations.Listentotheconversationscarefullyandthenanswerthequestionsthatfollow.Conversation1W:Hi,Tom.Iheardyouwenttoajobinterviewyesterday.Howdiditgo?M:Well,itwasokayatfirst.Theyaskedmeaboutmyeducationalbackgroundandpreviousworkexperience.Butthentheystartedaskingsomereallytoughquestions.W:Likewhat?M:TheyaskedmehowIwouldhandleadifficultclientwhowasalwayscomplaining.AndtheyalsoaskedmewhatIwoulddoifImadeabigmistakeatwork.W:Thosearetrickyquestions.Howdidyouanswerthem?M:Forthedifficult-clientquestion,IsaidIwouldlistentotheircomplaintspatiently,trytounderstandtheirneeds,andthencomeupwithasolution.Forthemistakequestion,IsaidIwouldtakeresponsibility,admitthemistaketomysupervisorimmediately,andworkonfixingitassoonaspossible.W:Soundslikeyougavegoodanswers.Doyouthinkyou'llgetthejob?M:I'mnotsure.Theysaidthey'dletmeknowinaweek.Question1WhatdidtheinterviewersaskTomaboutfirst?A.Hisfutureplans.B.Hiseducationalbackground.C.Hisproblem-solvingskills.D.Hishobbies.Answer:BExplanation:Themansays“Theyaskedmeaboutmyeducationalbackgroundandpreviousworkexperience”atthebeginningoftheconversation,sotheanswerisB.Question2HowdidTomsayhewouldhandleadifficultclient?A.Byarguingwiththeclient.B.Byignoringtheclient'scomplaints.C.Bylisteningpatientlyandfindingasolution.D.Byaskingthesupervisortodealwiththeclient.Answer:CExplanation:Tomsays“Forthedifficult-clientquestion,IsaidIwouldlistentotheircomplaintspatiently,trytounderstandtheirneeds,andthencomeupwithasolution”,sotheanswerisC.Conversation2W:Hey,John.I'mthinkingabouttakingashorttripthisweekend.Anysuggestions?M:Well,there'sabeautifulsmalltownabouttwohours'drivefromhere.Ithasaveryold-fashioneddowntownareawithlotsofcuteshopsandcafes.Andthere'salsoaniceparkwhereyoucangoforawalk.W:Thatsoundsgreat.Arethereanygoodhotelsthere?M:Thereareafewsmallfamily-runhotels.Theyarenotveryexpensive,andtheserviceisusuallyquitegood.Butyoumightwanttobookinadvancebecauseitcangetbusyonweekends.W:Okay.DoyouthinkIneedacartogetaroundinthetown?M:Notreally.Thetownisquitesmall,andmostoftheattractionsarewithinwalkingdistance.Youcanjustparkyourcaratthehotelandexploreonfoot.Question3WheredoesJohnsuggestthewomangothisweekend?A.Abigcity.B.Asmalltown.C.Amountain.D.Abeach.Answer:BExplanation:Johnsays“Well,there'sabeautifulsmalltownabouttwohours'drivefromhere”,sotheanswerisB.Question4WhatdoesJohnsayaboutthehotelsinthetown?A.Theyareveryexpensive.B.Theyareallchainhotels.C.Theyarefamily-runandnotexpensive.D.Theyarealwaysfullybooked.Answer:CExplanation:Johnmentions“Thereareafewsmallfamily-runhotels.Theyarenotveryexpensive,andtheserviceisusuallyquitegood”,sotheanswerisC.SectionBPassagesInthissection,youwillhearseveralpassages.Listentothepassagescarefullyandthenanswerthequestionsthatfollow.Passage1TheGreatWallofChinaisoneofthemostfamousman-madestructuresintheworld.ItwasoriginallybuilttoprotectthenorthernbordersoftheChineseEmpirefromvariousnomadicgroups.ConstructionoftheGreatWallbeganinthe7thcenturyBCandcontinuedforover2,000years.Thewallismadeofavarietyofmaterials,includingbricks,tampedearth,stones,andwood.Itstretchesover21,000kilometersacrossChina.Alongthewall,therearewatchtowers,fortresses,andpasses.Thesewereusedformilitarypurposes,suchasobservingtheenemy,sendingsignals,andstoringsupplies.Today,theGreatWallisamajortouristattraction.Millionsofpeoplefromallovertheworldcometovisititeveryyear.ItnotonlyrepresentstherichhistoryandcultureofChinabutalsoshowsthegreatengineeringskillsoftheancientChinesepeople.Question5WhywastheGreatWallofChinaoriginallybuilt?A.Toattracttourists.B.Tomarktheborderofdifferentprovinces.C.Toprotectthenorthernbordersfromnomadicgroups.D.ToshowthepoweroftheChineseemperors.Answer:CExplanation:Thepassagestates“ItwasoriginallybuilttoprotectthenorthernbordersoftheChineseEmpirefromvariousnomadicgroups”,sotheanswerisC.Question6WhatmaterialswereusedtobuildtheGreatWall?A.Onlybricks.B.Bricks,earth,stones,andwood.C.Steelandconcrete.D.Glassandplastic.Answer:BExplanation:Thepassagementions“Thewallismadeofavarietyofmaterials,includingbricks,tampedearth,stones,andwood”,sotheanswerisB.Passage2Inmodernsociety,timemanagementisbecomingincreasinglyimportant.Manypeoplefinditdifficulttobalancework,family,andpersonallife.Oneeffectivewaytomanagetimeistomakeato-dolist.Ato-dolisthelpsyouorganizeyourtasksandprioritizethem.Youcanwritedownallthethingsyouneedtodo,fromsmalldailytaskslikedoingthelaundrytobiglong-termprojects.Then,youcanrankthemaccordingtotheirimportanceandurgency.Anotherimportanttipistosetspecificgoalsanddeadlinesforeachtask.Thiscanhelpyoustayfocusedandmotivated.Forexample,ifyouhaveareporttowrite,setadeadlineforcompletingthefirstdraft,theseconddraft,andthefinalversion.Finally,it'simportanttolearntosay“no”tounnecessarytasksorrequests.Ifyoutakeontoomanythings,you'llendupfeelingoverwhelmedandmaynotbeabletocompleteanyofthemeffectively.Question7Whyistimemanagementimportantinmodernsociety?A.Becausepeoplehavetoomanyfriends.B.Becausepeoplewanttoworkless.C.Becausepeoplefindithardtobalancedifferentaspectsoflife.D.Becausepeopleliketobebusyallthetime.Answer:CExplanation:Thepassagesays“Manypeoplefinditdifficulttobalancework,family,andpersonallife”,whichiswhytimemanagementisimportant,sotheanswerisC.Question8Whatisonewaytomanagetimeeffectively?A.Makingato-dolist.B.WatchingTVallday.C.Sleepingforalongtime.D.Procrastinating.Answer:AExplanation:Thepassagestates“Oneeffectivewaytomanagetimeistomakeato-dolist”,sotheanswerisA.SectionCNewsBroadcastInthissection,youwillhearseveralnewsitems.Listentothemcarefullyandthenanswerthequestionsthatfollow.NewsItem1Amajorearthquakehitacoastalcitylastnight.Theearthquake,whichmeasured6.5ontheRichterscale,causedwidespreaddamagetobuildingsandinfrastructure.Manyhousescollapsed,andseveralroadswereblocked.Rescueteamshavebeensenttotheaffectedarea.Theyareworkinghardtosearchforsurvivorsandprovideemergencyassistance.Sofar,atleast20peoplehavebeenconfirmeddead,anddozensmoreareinjured.Thelocalgovernmenthasdeclaredastateofemergencyandiscallingforinternationalaid.Question9Whatwasthemagnitudeoftheearthquake?A.5.5B.6.5C.7.5D.8.5Answer:BExplanation:Thenewssays“Theearthquake,whichmeasured6.5ontheRichterscale”,sotheanswerisB.Question10Whathasthelocalgovernmentdone?A.Ithascanceledtheemergency.B.Ithascalledforinternationalaid.C.Ithasstoppedtherescuework.D.Ithasclosedtheaffectedarea.Answer:BExplanation:Thenewsstates“Thelocalgovernmenthasdeclaredastateofemergencyandiscallingforinternationalaid”,sotheanswerisB.PartIIIClozeDecidewhichofthechoicesgivenbelowwouldbestcompletethepassageifinsertedinthecorrespondingblanks.MarkthebestchoiceforeachblankonANSWERSHEETTWO.Thewaythatpeopleusesocialmediahaschangedsignificantlyovertheyears.SocialmediaplatformslikeFacebook,Twitter,andInstagramhavebecomeanintegralpartofmanypeople'slives.Intheearlydaysofsocialmedia,itwasmainlyusedfor(11)withfriendsandfamily.Peoplewouldshareupdatesabouttheirdailylives,postphotos,andleavecommentsoneachother'sprofiles.However,associalmediahasevolved,its(12)hasexpanded.Today,socialmediaisnotonlyatoolforpersonalcommunicationbutalsoapowerfulmarketing(13).Businessesusesocialmediatoreachawideraudience,promotetheirproductsandservices,andbuildbrandawareness.Influencersonsocialmediahavealsoemergedasanewformofmarketing.Theseindividualshavealargenumberoffollowersandcan(14)thepurchasingdecisionsoftheirfans.Moreover,socialmediahasalsobecomeaplatformforsocialandpolitical(15).Peopleuseittoexpresstheiropinionsonvariousissues,organizeprotests,andraiseawarenessaboutimportantcauses.However,socialmediaalsohasits(16).Itcanleadtofeelingsofisolationanddepression,especiallyifpeoplecomparethemselvestoomuchtoothers.Therearealsoconcernsaboutprivacyandthespreadof(17)information.Inconclusion,socialmediaisadouble-edgedsword.Ithasbroughtmanybenefits,suchas(18)peoplearoundtheworldandprovidingaplatformforself-expression.Butatthesametime,itisimportanttouseit(19)andbeawareofitspotentialnegativeimpacts.(11)A.communicatingB.competingC.comparingD.complainingAnswer:AExplanation:Thecontexthereisabouttheearlyuseofsocialmedia.Socialmediaismainlyusedforcommunicationwithfriendsandfamily.“Communicating”fitsthecontext.“Competing”meanstocompete,whichisnotrelevant.“Comparing”isaboutmakingcomparisons,and“complaining”isaboutexpressingdissatisfaction,neitherofwhichisthemainusedescribedhere.(12)A.functionB.formC.fashionD.fictionAnswer:AExplanation:Associalmediahasdeveloped,itsfunctionhasexpanded.“Function”referstothepurposeorrolethatsomethingserves.“Form”isabouttheshapeorstructure,“fashion”isrelatedtostyle,and“fiction”isaboutmade-upstories,noneofwhichdescribethechangeinwhatsocialmediacando.(13)A.goalB.toolC.targetD.testAnswer:BExplanation:Businessesusesocialmediaasameanstoachievetheirmarketinggoals,soitisa“tool”.“Goal”istheaim,“target”issomethingtobeaimedat,and“test”isforevaluation,whicharenotappropriateinthiscontext.(14)A.affectB.effectC.infectD.defectAnswer:AExplanation:“Affect”isaverbthatmeanstohaveaninfluenceon.Influencerscaninfluencethepurchasingdecisionsoftheirfans.“Effect”isusuallyanoun,“infect”meanstospreadadiseaseorabadinfluenceinadifferentsense,and“defect”isanounmeaningafault.(15)A.actionB.activityC.movementD.behaviorAnswer:CExplanation:Socialandpolitical“movement”referstoorganizedeffortsbyagroupofpeopletobringaboutsocialorpoliticalchange.“Action”ismoregeneral,“activity”isabroadertermforsomethingbeingdone,and“behavior”isabouthowapersonacts,whicharenotasspecificas“movement”inthiscontext.(16)A.advantagesB.disadvantagesC.profitsD.productsAnswer:BExplanation:Thefollowingsentencesmentionthenegativeaspectsofsocialmedia,suchasisolationandprivacyconcerns,soithas“disadvantages”.“Advantages”arethepositiveaspects,“profits”arerelatedtomoney-making,and“products”areitems,whicharenotrelevant.(17)A.falseB.realC.goodD.usefulAnswer:AExplanation:Thereareconcernsaboutthespreadofuntrueinformationonsocialmedia,so“false”iscorrect.“Real”,“good”,and“useful”donotdescribethetypeofinformationthatcausesconcerns.(18)A.connectingB.disconnectingC.correctingD.collectingAnswer:AExplanation:Socialmediahasthebenefitofconnectingpeoplearoundtheworld.“Connecting”fitsthecontext.“Disconnecting”istheopposite,“correcting”isaboutmakingsomethingright,and“collecting”isaboutgatheringthings,whicharenotrelevant.(19)A.carefullyB.carelesslyC.recklesslyD.randomlyAnswer:AExplanation:Sincesocialmediahasnegativeimpacts,itisimportanttouseit“carefully”.“Carelessly”,“recklessly”,and“randomly”allimplyalackofcaution,whichisnotadvisable.PartIVGrammarandVocabularyTherearethirtysentencesinthissection.BeneatheachsentencetherearefourwordsorphrasesmarkedA,B,CandD.Chooseonewordorphrasethatbestcompletesthesentence.(20)Theprofessor,aswellashisstudents,______toattendtheconference.A.aregoingB.weregoingC.isgoingD.havebeengoingAnswer:CExplanation:When“aswellas”isusedtoconnecttwosubjects,theverbagreeswiththefirstsubject.Here,thefirstsubjectis“theprofessor”(singular),sotheverbshouldbeinthesingularform.“Isgoing”isthecorrectformforthepresentcontinuoustenseindicatingfutureaction.(21)IwishI______theanswertothequestion.A.knowB.knewC.haveknownD.willknowAnswer:BExplanation:“Wish”isusedtoexpressadesireforsomethingthatisnottrueornotpossibleinthepresentorfuture.Inthiscase,thestructure“wish+pastsimple”isusedtoexpressapresentwishforadifferentsituation.So,“knew”iscorrect.(22)Thebook,______iswritteninsimpleEnglish,issuitableforbeginners.A.whichB.thatC.whatD.whoAnswer:AExplanation:Thisisanon-restrictiverelativeclause.“Which”isusedtointroducenon-restrictiverelativeclausesreferringtothings.“That”isusedinrestrictiverelativeclauses.“What”isnotusedinrelativeclauses,and“who”isusedforpeople.(23)HehasmadegreatprogressinEnglish______hejoinedtheEnglishclub.A.sinceB.untilC.beforeD.afterAnswer:AExplanation:“Since”isusedtoindicateapointintimefromwhichanactionorsituationhascontinuedtothepresent.Thepresentperfecttense“hasmade”isoftenusedwith“since”.“Until”indicatesatimeuptowhichsomethinghappens,“before”isforanearliertime,and“after”isforalatertime,whichdonotfitthecontextwiththepresentperfecttense.(24)Theproblemis______difficult______fewstudentscansolveit.A.so;thatB.such;thatC.too;toD.enough;toAnswer:AExplanation:“So...that...”isusedtoshowacause-and-effectrelationship,where“so”isfollowedbyanadjectiveoradverb.Here,“difficult”isanadjective,and“sodifficultthatfewstudentscansolveit”makessense.“Such...that...”isusedwithanounphrase.“Too...to...”and“enough...to...”havedifferentstructuresanddonotfitthiscontext.(25)Thenewregulationswillcomeinto______nextmonth.A.effectB.affectC.effortD.affordAnswer:AExplanation:“Comeintoeffect”isafixedphrasemeaningtostarttobeusedorvalid.“Affect”isaverb,“effort”meanshardwork,and“afford”meanstobeabletopayforsomething,noneofwhichfitthephrase.(26)Themanagerisvery______aboutpunctuality;heexpectseveryonetobeontime.A.particularB.partialC.peculiarD.specificAnswer:AExplanation:“Beparticularabout”isaphrasemeaningtobeverycarefulorexactaboutsomething.“Partial”meanshavingapreferencefor,“peculiar”meansstrange,and“specific”meansdetailedandprecise,buttheydonotformthecorrectphraseinthiscontext.(27)Thepolicearetryingto______thecauseoftheaccident.A.lookintoB.lookafterC.lookupD.lookoutAnswer:AExplanation:“Lookinto”meanstoinvestigate.Thepolicearetryingtofindoutthecauseoftheaccident,so“lookinto”isappropriate.“Lookafter”meanstotakecareof,“lookup”meanstosearchforinformation,and“lookout”meanstobecareful.(28)Theyoungmanshowedgreat______inthefaceofdanger.A.courageB.energyC.strengthD.powerAnswer:AExplanation:“Courage”isthequalityofbeingbraveinthefaceofdangerordifficulty.Theyoungmanshowedbraveryinthefaceofdanger,so“courage”iscorrect.“Energy”isaboutvitality,“strength”isaboutphysicalormentalpower,and“power”isaboutauthorityorability,whicharenotasrelevantas“courage”inthiscontext.(29)Sheisalways______others;sheneverthinksaboutherself.A.thinkingofB.thinkingaboutC.thinkingoverD.thinkingupAnswer:AExplanation:“Thinkof”canmeantoconsiderorhaveinmindtheneedsorfeelingsofothers.Sheisalwaysconsideringothers,so“thinkingof”iscorrect.“Thinkabout”ismoregeneralabouthavingthoughtsonatopic,“thinkover”istoconsidercarefully,and“thinkup”istoinventorcomeupwithsomething.(30)Thecompanyisplanningto______anewmarketingcampaignnextmonth.A.launchB.startC.beginD.openAnswer:AExplanation:“Launch”isoftenusedwhenstartinganewproject,product,orcampaign.“Start”and“begin”aremoregeneral,and“open”isusuallyusedforopeningaplaceoranevent,so“launch”isthemostappropriateinthiscontext.(31)Theoldmanhasa______memory;hecanstillrememberthingsthathappeneddecadesago.A.sharpB.keenC.quickD.fastAnswer:BExplanation:“Keen”canbeusedtodescribeagoodmemory.A“keenmemory”meanshavingastrongabilitytorememberthings.“Sharp”ismoreaboutbeingintelligentorhavingapointededge,“quick”and“fast”arerelatedtospeed,notmemory.(32)Thestudentswere______bythedifficultmathproblem.A.puzzledB.surprisedC.shockedD.amazedAnswer:AExplanation:“Puzzled”meansconfusedorunabletounderstand.Thestudentswereconfusedbythedifficultmathproblem,so“puzzled”iscorrect.“Surprised”,“shocked”,and“amazed”aremoreaboutunexpectedness,notthestateofbeingconfusedbyaproblem.(33)Thegovernmenthastakenmeasuresto______theeconomicgrowth.A.promoteB.improveC.advanceD.progressAnswer:AExplanation:“Promote”meanstohelpsomethingdeveloporincrease.Thegovernmenttakesmeasurestohelptheeconomicgrowth,so“promote”isappropriate.“Improve”ismoreaboutmakingsomethingbetter,“advance”canmeantomoveforward,and“progress”isanounoranintransitiveverb,whichdonotfitthecontextaswellas“promote”.(34)Thenewsoftwarehasalotof______featuresthatmakeitveryuser-friendly.A.beneficialB.advantageousC.favorableD.usefulAnswer:DExplanation:“Useful”meanshavingapracticaluse.Thefeaturesofthesoftwarearepracticalandmakeituser-friendly,so“useful”iscorrect.“Beneficial”ismoreabouthavingapositiveeffect,“advantageous”isabouthavinganadvantage,and“favorable”isaboutbeingpositiveorapproved,whicharenotasdirectlyrelatedtothepracticalityofthefeatures.(35)Thesinger'sperformancewasso______thattheaudiencegaveherastandingovation.A.outstandingB.excellentC.remarkableD.alloftheaboveAnswer:DExplanation:“Outstanding”,“excellent”,and“remarkable”allmeanverygood,ofahighquality.Thesinger'sperformancewasofsuchahighlevelthattheaudiencegaveherastandingovation,soallofthesewordscanbeusedtodescribeit.(36)Thechildrenwere______toseethecolorfulfireworks.A.excitedB.excitingC.interestedD.interestingAnswer:AExplanation:“Excited”isusedtodescribeaperson'sfeelingofbeingfullofenthusiasmandeagerness.Thechildrenhadthisfeelingwhenseeingthefireworks.“Exciting”isusedtodescribesomethingthatcausesexcitement.“Interested”isabouthavinganinterestinsomething,and“interesting”isfordescribingsomethingthatarousesinterest.(37)Weshould______ourattentionontheimportantissues.A.payB.focusC.giveD.putAnswer:BExplanation:“Focusone'sattentionon”isafixedphrasemeaningtoconcentrateonsomething.“Payattentionto”isalsoaphrase,but“focus”ismoreappropriatehereasitemphasizestheactofconcentrating.“Give”and“put”donotformthecorrectphraseinthiscontext.(38)Theteachertoldthestudentsto______theirhomeworkbeforeclass.A.handinB.handoutC.handoverD.handdownAnswer:AExplanation:“Handin”meanstosubmitsomething,usuallyworkordocuments.Thestudentsaresupposedtosubmittheirhomeworkbeforeclass,so“handin”iscorrect.“Handout”istodistribute,“handover”istogivecontrolorpossessiontosomeoneelse,and“handdown”istopasssomethingfromonegenerationtoanother.(39)Theweatherforecastsaysit______raintomorrow.A.mayB.canC.mustD.shouldAnswer:AExplanation:“May”isusedtoexpresspossibility.Theweatherforecastisjustsayingthereisapossibilityofraintomorrow.“Can”ismoreaboutabilityorpermission,“must”isforcertaintyorobligation,and“should”isforadviceorexpectation,whichdonotfitthecontextofexpressingaweatherpossibility.PartVReadingComprehensionSectionAMultiple-ChoiceQuestionsInthissectionthereareseveralpassagesfollowedbytenmultiple-choicequestions.Foreachquestion,therearefoursuggestedanswersmarkedA,B,CandD.ChoosetheonethatyouthinkisthebestanswerandmarkyouranswersonANSWERSHEETTWO.Passage1Theconceptofsustainabledevelopmenthasbeenaroundforafewdecades,butithasgainedmoreattentioninrecentyears.Sustainabledevelopmentaimstomeettheneedsofthepresentwithoutcompromisingtheabilityoffuturegenerationstomeettheirownneeds.Oneofthekeyaspectsofsustainabledevelopmentisenvironmentalprotection.Thisincludesreducingpollution,conservingnaturalresources,andprotectingbiodiversity.Forexample,intheenergysector,thereisagrowingtrendtowardsusingrenewableenergysourcessuchassolar,wind,andhydropower.Thesesourcesarecleananddonotdepletetheearth'sresources.Anotherimportantaspectissocialdevelopment.Thisinvolvesensuringthatallmembersofsocietyhaveaccesstobasicservicessuchaseducation,healthcare,andcleanwater.Italsomeanspromotingequalityandreducingpoverty.Forinstance,micro-financeinitiativeshavebeensuccessfulinprovidingsmallloanstopoorentrepreneurs,helpingthemstarttheirownbusinessesandimprovetheireconomicsituation.Economicdevelopmentisalsoacrucialpartofsustainabledevelopment.However,itshouldbedoneinawaythatisenvironmentallyfriendlyandsociallyresponsible.Forexample,companiescanadoptsustainablebusinesspractices,suchasreducingwasteandusingsustainablematerialsintheirproductionprocesses.Question40Whatisthemainideaofsustainabledevelopment?A.Tofocusonlyonenvironmentalprotecti