2026年重庆市北师大版高中英语必修第三册第4单元课后练习

2026年重庆市北师大版高中英语必修第三册第4单元课后练习一、单项选择题（总共10题，每题2分，共20分）1.AccordingtothepassageinUnit4,whatisthemainpurposeofthearticle"TheImpactofSocialMediaonTeenagers"?Theauthorprimarilyaimsto______.A.persuadereaderstoquitusingsocialmediacompletelyB.explainthepositiveeffectsofsocialmediaonteenagers'livesC.analyzethenegativeconsequencesofexcessivesocialmediauseD.suggestwaystobalancesocialmediaandofflineactivitiesAnswer:CExplanation:Thepassagefocusesondiscussinghowsocialmediacanleadtoissueslikeanxiety,depression,andpooracademicperformanceamongteenagers.Theauthorpresentsevidenceandcasestudiestohighlightthesenegativeeffects,makingoptionCthecorrectanswer.OptionsAandBareincorrectbecausethearticledoesnotadvocateforcompleteavoidanceoronlyhighlightpositives.OptionDisnotthemaingoal,asthearticleismoreaboutidentifyingproblemsratherthanofferingsolutions.2.Inthereadingmaterial,akeyargumentpresentedbythepsychologistDr.EmilyCarteristhat______.A.socialmediaplatformsaredesignedtomaximizeuserengagementB.teenagersshouldbeallowedunlimitedaccesstosocialmediaC.parentalsupervisioncancompletelyeliminatetherisksofsocialmediaD.thementalhealthofteenagersisunaffectedbysocialmediausageAnswer:AExplanation:Dr.Carter'sargumentinthepassagerevolvesaroundhowsocialmediaalgorithmsareengineeredtokeepusershooked,oftenleadingtoaddictivebehavior.ThisalignswithoptionA.OptionBisincorrectbecausethearticlecriticizesunlimitedaccess.OptionCistooabsolute,asthepassagesuggestssupervisionhelpsbutdoesnotguaranteesafety.OptionDcontradictstheevidenceprovidedinthetext.3.ThearticleusestheexampleofLiam,ahighschoolstudent,toillustrate______.A.howsocialmediacanhelpstudentsbuildsocialnetworksB.thephysicalhealthproblemscausedbyexcessivescreentimeC.theemotionaldistressresultingfromonlinebullyingD.theeconomicbenefitsofbeinganinfluencerAnswer:CExplanation:Liam'sstoryinthepassagedetailshowhewastargetedbycyberbullyingonInstagram,leadingtosevereemotionaldistress.ThissupportsoptionC.OptionAisincorrectbecauseLiam'scasefocusesonharm,notbenefits.OptionBisnotthemainpointofhisstory,whichcentersonemotionalratherthanphysicalhealth.OptionDisunrelatedtohisexperience.4.Accordingtothesurveyresultsmentionedinthepassage,whatpercentageofteenagersreportedfeelingstressedafterusingsocialmediaformorethantwohoursdaily?A.20%B.35%C.50%D.65%Answer:DExplanation:Thesurveydatacitedinthearticleindicatesthat65%ofteenagersexperiencestresswhentheyspendovertwohoursonsocialmediadaily.ThisfiguredirectlysupportsoptionD.Theotherpercentagesarenotmentionedinthepassage.5.Thepassagesuggeststhatoneeffectivewaytomitigatethenegativeeffectsofsocialmediaisto______.A.deleteallsocialmediaaccountsimmediatelyB.setstricttimelimitsforsocialmediausageC.encourageteenagerstopostonlypositivecontentD.relysolelyonpeersupporttoaddressonlineissuesAnswer:BExplanation:Thearticlerecommendsthatparentsandeducatorshelpteenagersestablishreasonabletimelimitsforsocialmediausetoreduceitsharmfulimpact.ThisalignswithoptionB.OptionAisextremeandnotsupportedbythepassage.OptionCignorestheunderlyingproblemsofsocialmediaculture.OptionDisinsufficient,asprofessionalguidanceisalsoemphasized.6.Whatisthetoneofthearticle"TheImpactofSocialMediaonTeenagers"?A.sarcasticandhumorousB.objectiveandcriticalC.persuasiveandemotionalD.indifferentanddetachedAnswer:BExplanation:Thearticlepresentsevidenceandexpertopinionsinabalancedmanner,pointingoutboththerisksandrealitiesofsocialmediawithoutexcessivebias.ThismakesoptionBthecorrecttone.OptionAisincorrectbecausethearticleisserious,nothumorous.OptionCispartiallytrue(itispersuasivebutnotoverlyemotional).OptionDiswrongbecausetheauthorclearlycaresabouttheissue.7.Thephrase"digitaldetox"asusedinthepassagerefersto______.A.acompetitiontoseewhocanpostthemostcontentB.aperiodofabstainingfromsocialmediaformentalhealthC.amethodtoincreasefollowersbyusingtrendinghashtagsD.astrategytocreatemoreengagingcontentAnswer:BExplanation:"Digitaldetox"inthepassageisdefinedastakingabreakfromsocialmediatoimprovementalwell-being,whichmatchesoptionB.OptionAisunrelatedtotheconcept.OptionCfocusesongainingpopularity,notmentalhealth.OptionDisaboutcontentcreation,notdetachment.8.Accordingtothepassage,whatisacommonmisconceptionaboutsocialmedia?A.Socialmediaisentirelybeneficialforteenagers.B.Cyberbullyingisnotaseriousissueonsocialmedia.C.Teenagerscancontroltheirsocialmediausagewithouthelp.D.Socialmediaplatformsarenotprofitableforcompanies.Answer:CExplanation:Thearticlementionsthatmanyteenagersbelievetheycanmanagetheirsocialmediauseindependently,buttherealityisthatexternalsupportisoftenneeded.ThissupportsoptionC.OptionAisageneralizationthearticlecritiques.OptionBcontradictstheevidenceofcyberbullying.OptionDisnotdiscussedinthepassage.9.Thepassageincludesagraphshowingthecorrelationbetweensocialmediauseandsleepquality.Whatdoesthegraphindicate?A.Nocorrelationexistsbetweenthetwovariables.B.Increasedsocialmediauseleadstobettersleep.C.Highersocialmediauseisassociatedwithpoorersleep.D.Sleepqualityimprovesassocialmediausedecreases.Answer:CExplanation:Thegraphinthepassageclearlyshowsthatteenagerswhousesocialmediaformorethanthreehourspernightreportworsesleepquality.ThisalignswithoptionC.OptionAisincorrectbecausethegraphshowsacleartrend.OptionBistheoppositeofwhatisobserved.OptionDisnotdirectlysupportedbythegraph'sdata.10.Whatistheauthor'smainsuggestionforparentsintheconclusion?A.Tocompletelybanallsocialmediafortheirchildren.B.Tomonitortheirchildren'ssocialmediaactivityregularly.C.Toencourageopencommunicationaboutonlineexperiences.D.Torewardchildrenforreducingtheirsocialmediatime.Answer:CExplanation:Theauthorconcludesbyemphasizingtheimportanceofparentstalkingwiththeirchildrenabouttheirsocialmediaexperiencestoaddressconcernsandbuildtrust.ThissupportsoptionC.OptionAistooextreme.OptionBismentionedbutnotastheprimarysuggestion.OptionDisnotthefocusoftheconclusion.二、填空题（总共10题，每题2分，共20分）1.Thepassagediscusseshowsocialmediacanleadto______amongteenagers,whichaffectstheirdailylives.Answer:anxietyanddepressionExplanation:Thearticlementionsstudieslinkingexcessivesocialmediausetoincreasedanxietyanddepressioninteenagers,makingthisthecorrectanswer.2.Dr.EmilyCarter,apsychologist,arguesthatsocialmediaalgorithmsaredesignedto______usersbyshowingthemcontenttheywanttosee.Answer:keepengagedExplanation:Thepassagestatesthatplatformsusealgorithmstomaximizeuserengagement,whichalignswiththisanswer.3.Liam'sstoryinthearticleisanexampleofthenegativeimpactof______onteenagers.Answer:cyberbullyingExplanation:Liamwasbulliedonline,illustratinghowcyberbullyingcanharmteenagersemotionally.4.Accordingtothesurvey,65%ofteenagersreportedfeeling______afterusingsocialmediaformorethantwohoursdaily.Answer:stressedExplanation:Thesurveydatacitedinthepassageshowsthat65%ofteenagersexperiencestressfromprolongedsocialmediause.5.Thearticlesuggeststhata"digitaldetox"involves______fromsocialmediaforasetperiodtoimprovementalhealth.Answer:abstainingExplanation:Thepassagedefines"digitaldetox"asabstainingfromsocialmediatoreducenegativeeffects.6.Acommonmisconceptionmentionedinthepassageisthatteenagerscan______theirsocialmediausagewithouthelp.Answer:controlExplanation:Thearticlehighlightsthatmanyteenagersoverestimatetheirabilitytocontrolsocialmediauseindependently.7.Thegraphinthepassageshowsadirectcorrelationbetween______socialmediauseandpoorersleepquality.Answer:higherExplanation:Thegraphindicatesthatmoresocialmediauseislinkedtoworsesleep.8.Theauthorrecommendsthatparentshelpteenagers______timelimitsforsocialmediausage.Answer:setExplanation:Thepassageadvisesparentstosetreasonabletimelimitstomitigaterisks.9.Thearticlementionsthatsocialmediaplatformsareprofitablebecausetheycollectuserdatato______.Answer:targetadvertisementsExplanation:Thepassageexplainsthatplatformsusedatatocreatetargetedads,generatingrevenue.10.Theconclusionemphasizestheimportanceof______betweenparentsandchildrenaboutonlineexperiences.Answer:communicationExplanation:Theauthorsuggestsopencommunicationasakeysolutiontoaddresssocialmediaissues.三、判断题（总共10题，每题2分，共20分）1.Thearticle"TheImpactofSocialMediaonTeenagers"onlyfocusesonthenegativeeffectsofsocialmedia.Answer:FalseExplanation:Whilethearticlecriticizessocialmedia,italsoacknowledgesitsbenefitsinsomecontexts,suchasstayingconnectedwithfriends.2.Dr.EmilyCarterbelievesthatsocialmediaisinherentlyharmfultoteenagers'mentalhealth.Answer:FalseExplanation:Thepassagestatesthatshefocusesonhowsocialmediacanbeharmful,notthatitisalwaysharmful.3.Liam'sstoryisusedtoarguethatsocialmediacanhelpteenagersbuildsocialnetworks.Answer:FalseExplanation:Liam'scaseillustratesthedangersofsocialmedia,notitsbenefits.4.Thesurveyresultsinthepassageshowthat50%ofteenagersexperiencestressfromsocialmedia.Answer:FalseExplanation:Thecorrectfigureis65%,asstatedinthepassage.5.Thearticlesuggeststhatteenagersshouldcompletelydeletetheirsocialmediaaccountstoavoidproblems.Answer:FalseExplanation:Thearticlepromotesmoderation,notcompletedeletion.6.A"digitaldetox"isdescribedasacompetitiontopostthemostcontent.Answer:FalseExplanation:Thepassagedefinesitasabreakfromsocialmedia,notacompetition.7.Thegraphinthepassageshowsthatmoresocialmediauseleadstobettersleep.Answer:FalseExplanation:Thegraphindicatestheopposite:highersocialmediauseislinkedtopoorersleep.8.Theauthorrecommendsthatparentsrelysolelyonpeersupporttohelpchildrenwithonlineissues.Answer:FalseExplanation:Thearticlesuggestsacombinationofparentalguidanceandpeersupport,notjustpeers.9.Socialmediaplatformsarenotprofitablebecausetheydonotcollectuserdata.Answer:FalseExplanation:Thepassagestatesthatplatformsusedatatotargetads,whichisprofitable.10.Theconclusionofthearticleoffersspecificstepsforparentstoreducetheirchildren'ssocialmediatime.Answer:FalseExplanation:Theconclusionemphasizescommunicationratherthanconcretesteps.四、简答题（总共8题，每题2分，共16分）1.Accordingtothepassage,whatarethreenegativeeffectsofsocialmediaonteenagers?Answer:-Increasedanxietyanddepression-Poorsleepquality-CyberbullyingExplanation:Thepassagediscussesthesethreekeyissuesasmajorconcernsrelatedtosocialmediause.2.HowdoesDr.EmilyCarterexplaintheaddictivenatureofsocialmediaplatforms?Answer:Socialmediaplatformsusealgorithmstoshowuserscontenttheyarelikelytoengagewith,keepingthemhooked.Theyalsocreatefeedbackloopswherelikesandcommentsreinforcecontinueduse.Explanation:Thearticledetailshowalgorithmsanduserengagementmechanismscontributetoaddiction.3.Liam'sstoryprovidesanexampleofwhattypeofonlineissue?Answer:CyberbullyingExplanation:Liamwastargetedbyothersonsocialmedia,illustratingtheharmfuleffectsofonlinebullying.4.Whatdoesthesurveyinthepassagerevealaboutteenagers'socialmediahabits?Answer:Thesurveyshowsthat65%ofteenagersfeelstressedafterusingsocialmediaformorethantwohoursdaily,indicatingasignificantnegativeimpactonmentalhealth.Explanation:Thepassagehighlightsthisstatistictoemphasizetheproblem.5.Howdoesthearticledefine"digitaldetox"?Answer:A"digitaldetox"isaperiodofabstainingfromsocialmediatoimprovementalwell-beingandreducestress.Explanation:Thepassageprovidesthisdefinitiontoofferasolutionformitigatingsocialmedia'sharms.6.Whatisacommonmisconceptionaboutsocialmediauseaccordingtothearticle?Answer:Manyteenagersbelievetheycancontroltheirsocialmediausewithouthelp,butthearticlestatesthatexternalsupportisoftenneeded.Explanation:Thepassagecritiquesthisoverconfidenceasunrealistic.7.Accordingtothegraphinthepassage,whatistherelationshipbetweensocialmediauseandsleepquality?Answer:Highersocialmediauseisassociatedwithpoorersleepquality.Teenagerswhousesocialmediaformorethanthreehoursnightlyreportworsesleep.Explanation:Thegraphdirectlysupportsthiscorrelation.8.Whatdoestheauthorsuggestparentsdotohelptheirchildrenwithsocialmedia?Answer:Parentsshouldsetreasonabletimelimitsforsocialmediauseandencourageopencommunicationaboutonlineexperiencestoaddressconcerns.Explanation:Theconclusionoffersthesetwokeystrategiesassolutions.五、应用题（总共8题，每题4分，共24分）1.Imagineyouareahighschoolstudentwhousessocialmediadaily.Basedonthepassage,howcouldyoureducethenegativeeffectsofsocialmediaonyourlife?Answer:Icouldreducenegativeeffectsby:-Settingadailytimelimitforsocialmediause(e.g.,onehourperday).-Takingregularbreaks,suchasa"digitaldetox"onceaweek.-Avoidingsocialmediabeforebedtoimprovesleepquality.-TalkingtomyparentsoracounselorifIfeeloverwhelmedbyonlineinteractions.Explanation:Theseactionsalignwiththepassage'srecommendationsformitigatingrisks.2.Dr.EmilyCartermentionsthatsocialmediaalgorithmsaredesignedtokeepusersengaged.Howcouldthisdesignbemodifiedtomakesocialmediasaferforteenagers?Answer:Algorithmscouldbeadjustedto:-Prioritizereal-worldactivitiesoverscreentime.-Showwarningswhenusersspendexcessivetimeontheplatform.-Encouragediverseandpositivecontent,notjustviralorcontroversialposts.-Limittheexposuretoharmfulcontentlikecyberbullying.Explanation:Thesemodificationsaddressthepassage'scritiqueofhowplatformscurrentlyoperate.3.Liamwasbulliedonsocialmedia,leadingtoemotionaldistress.Whatstepscouldhisschooltaketopreventsuchincidents?Answer:Theschoolcould:-Implementstricteranti-bullyingpolicieswithclearconsequences.-Trainteachersandstafftorecognizeandaddresscyberbullying.-Createsupportgroupsforstudentswhoexperienceonlineharassment.-Educatestudentsabouttheimpactsofcyberbullyingandhowtoreportit.Explanation:ThesemeasuresdirectlyaddresstheissuesraisedinLiam'sstory.4.Thesurveyshowsthat65%ofteenagersfeelstressedfromsocialmedia.Whydoyouthinkthisisthecase,andwhatcouldbedonetohelpthesestudents?Answer:Stressmayresultfrom:-Socialcomparison(seeingothers'perfectlives).-Fearofmissingout(FOMO).-Constantnotificationsandpressuretorespond.Solutionscouldinclude:-Teachingstudentstocriticallyevaluatesocialmediacontent.-Encouragingmindfulnessandself-carepractices.-Promotingofflineactivitiestobalancescreentime.Explanation:Theanswerconnectstothepassage'sdiscussionofmentalhealthimpacts.5.Describeascenariowherea"digitaldetox"couldbebeneficialforateenager.Answer:Ateenagerwhospends4hoursdailyonsocialmediaandfeelsanxiousorirritablemightbenefitfromadigitaldetox.Forexample,iftheyrealizetheirsleepispoorandtheirgradesaredropping,theycouldtakeaone-weekbreakfromallsocialmedia.Duringthistime,theycouldfocusonhobbies,exercise,andface-to-faceinteractions,whichmightimprovetheirmoodandacademicperformance.Explanation:Thisscenarioappliestheconceptfromthepassagetoareal-worldsituation.6.Howcouldparentsandteenagersworktogethertosethealthysocialmediahabits?Answer:-Parentscouldmodelresponsiblesocialmediausethemselves.-Theycouldhaveregulardiscussionsaboutonlineexperiencesandsetrulestogether.-Teenagerscouldprovidefeedbackonwhatworksfortheminmanagingscreentime.-Bothcoulduseappsthattrackandlimitsocialmediause.Explanation:Thesestepsreflectthecollaborativeapproachsuggestedinthepassage.7.Thearticlementionsthatsocialmediaplatformsareprofitablebycollectinguserdata.Howcouldthisprofitmodelbechangedtoprioritizeuserwell-being?Answer:Platformscould:-Chargeusersforpremium,ad-freeexperiences.-Usedataonlytoimproveusersafety,notfortargetedadvertising.-Allowuserstocontrolhowtheirdataissharedandused.-Investinfeaturesthatpromotementalhealth,suchasdigitalwell-beingtools.Explanation:Thesealternativesaddresstheethicalconcernsraisedinthepassage.8.Ifyouweretowriteafollow-uparticletothepassage,whatadditionaltopicswouldyouinclude?Answer:Iwouldexplore: