2025-2026学年秋沪教版（新教材）初二英语上学期期末质量检测卷附答案（3套）

2025-2026学年秋沪教版（新教材）初二英语上学期期末质量检测卷附答案（一）选择题（共60分）单项选择（本题共15小题，每小题1分，满分15分）从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。—Whenyoudon’tknowanewword,youcan______itupinadictionary.—That’sagoodwaytolearnEnglish.A.lookB.putC.takeD.giveThereare______amazingnumbersinnature.Forexample,abeehassixlegsandeightwings.A.alotB.muchC.plentyofD.alittleMoreandmorepeopleenjoy______digitallives.Weusesmartphonestoworkandstudyeveryday.A.theyB.theirC.themD.theirsManygreat______havechangedourworld.Thelightbulbisoneofthem.A.inventionsB.inventC.inventorD.inventingMycousinwillgoonanexchangetriptoAmerica.Heislookingforwardto______newfriendsthere.A.makeB.makingC.makesD.made—Howcanwesolvethisproblem?—Thinkcarefully.______countsalotinsuchasituation.A.StrengthB.WisdomC.HealthD.WealthDoyouknowthesecretofimprovingyour______?Youcantrytorememberthingsbymakingsentences.A.memoryB.decisionC.interestD.habitPetsareourgoodfriends.Weshouldtakegoodcare______them.A.forB.ofC.withD.about—______haveyouhadyourpetdog?—Forthreeyears.It’sveryfriendlytoeveryone.A.HowlongB.HowoftenC.HowsoonD.HowfarIfyou______thecomputerproperly,itwillworkforalongtime.A.willuseB.useC.usedD.areusingThestorybookisveryinteresting.I______ittwicealready.A.readB.willreadC.havereadD.amreadingThisisthedictionary______myfatherboughtformeonmybirthday.A.whoB.whichC.whatD.whose—Youshouldnotspendtoomuchtimeplayingcomputergames.—______.It’sbadformyeyesandstudy.A.You’rewelcomeB.That’sallrightC.You’rerightD.NevermindMysister______tothelibraryeverySaturday.Shelikesreadingbooksaboutinventions.A.goB.goesC.wentD.willgo—IwilltakepartinanEnglishspeechcontesttomorrow.—______!Ibelieveyouwillwinthefirstprize.A.GoodluckB.CongratulationsC.ThankyouD.WhatapityII.完形填空（本题共15小题，每小题1分，满分15分）阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。Withthedevelopmentoftechnology,ourdigitalliveshavebecomemorecolorful.However,weshouldalsolearntousedigitalproductswisely.LetmetellyouastoryaboutmyfriendTom.Tomisaneighth-grader.Helovesusinghissmartphoneandcomputer.Heoften16gamesonlineforhourseveryday.Hethoughtitwasagoodwaytorelax.Butsoon,hefoundhis17wasgettingworse.Hecouldn’tremembernewwordsandformulas（公式）easily.Hisgradesdroppedquickly.Tom’steachernoticedhischangeandhadatalkwithhim.Theteachertoldhimthat18countsalotwhenusingdigitalproducts.Heshouldnotbecontrolledbythem.Instead,hecouldusethemtohelpwithhisstudy.Forexample,hecould19newwordsupindigitaldictionaries,watchEnglishvideostoimprovehislistening,anduseonlinetoolstomakestudyplans.Afterthetalk,Tomdecidedtochangehishabits.Hesetatimelimitforplayinggames.Healsostartedtousehiscomputertosearchforinformationabout20,suchasthehistoryofthelightbulbandthetelephone.Heevenjoinedanonlineclubtodiscussamazingnumbersinnaturewithotherstudents.Lastmonth,TomwentonanexchangetriptoAustralia.Beforethetrip,heusedtheInternettolearnaboutAustraliancultureandcustoms.Duringthetrip,hetookmanyphotoswithhissmartphoneandsharedthemwithhisfamilyandfriendsonline.Healsomadefriendswithalocalstudent.Theytalkedabouttheirdailylivesand21hobbies.Tomtoldhimabouthowhekeptapetcatathomeandhowhetookcareofit.Now,Tomhasabalanced（平衡的）digitallife.Heknowshowtousetechnologytoimprovehimself.Hismemoryhasbecomebetterandhisgradeshaveimprovedalot.Herealizesthattechnologyisausefultool,butweshoulduseitinasmartway.A.playsB.playedC.willplayD.isplayingA.decisionB.memoryC.interestD.healthA.strengthB.wealthC.wisdomD.courageA.lookB.putC.takeD.giveA.numbersB.petsC.exchangesD.inventionsA.ourB.theirC.hisD.herA.WhenB.BecauseC.AlthoughD.IfA.badB.goodC.boringD.difficultA.withB.forC.ofD.toA.whatB.whichC.whoD.whoseIII.阅读理解（本题共15小题，每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。Passage1HowtoLookUpWordsEffectivelyWhenlearningEnglish,weoftenmeetnewwords.Lookingthemupinadictionaryisagoodwaytounderstandtheirmeanings.Butdoyouknowhowtolookupwordseffectively?First,choosetherightdictionary.Formiddleschoolstudents,anEnglish-Chinesedictionaryissuitable.Itnotonlytellsthemeaningofwords,butalsoprovidesexamplesentencesandpronunciation.Second,payattentiontothepartofspeech（词性）.Awordmayhavedifferentmeaningsandusesdependingonitspartofspeech.Forexample,theword“look”canbeaverboranoun.Whenit’saverb,itcanmean“toseewithyoureyes”;whenit’sanoun,itcanmean“anexpressiononyourface”.Third,readtheexamplesentencescarefully.Examplesentencescanhelpyouunderstandhowtousethewordinrealsituations.Youcanevenmakeyourownsentenceswiththenewwordtorememberitbetter.Finally,don’tlookupeverynewwordimmediately.Whenreadingapassage,youcanfirsttrytoguessthemeaningofthenewwordaccordingtothecontext（上下文）.Ifyoucan’tguessit,thenlookitup.Thiscanhelpyouimproveyourreadingability.Byfollowingthesesteps,youcanlookupwordsmoreeffectivelyandimproveyourEnglishlearningefficiency.Whatkindofdictionaryissuitableformiddleschoolstudents?AnEnglish-Englishdictionary.B.AnEnglish-Chinesedictionary.AChinese-Englishdictionary.D.Apicturedictionary.Whyshouldwepayattentiontothepartofspeechwhenlookingupwords?Becauseitcanhelpusguessthemeaningofwords.Becauseitcanhelpusimproveourwritingability.Becauseawordmayhavedifferentmeaningsanduses.Becauseitcanhelpusrememberwordseasily.Whatcanexamplesentenceshelpusdo?Understandhowtousethewordinrealsituations.Guessthemeaningoftheword.Knowthepronunciationoftheword.Choosetherightdictionary.Whenshouldwelookupanewwordaccordingtothepassage?Immediatelywhenwemeetit.Afterguessingitsmeaningunsuccessfully.Afterreadingthewholepassage.Neverlookitup.Whatisthemainideaofthepassage?Theimportanceoflookingupwords.Howtochooseagooddictionary.Howtolookupwordseffectively.Thewaystoremembernewwords.Passage2AmazingInventionsThatChangedtheWorldThroughouthistory,manygreatinventionshavechangedthewaywelive,workandcommunicate.Herearethreeamazinginventionsthathavehadahugeinfluenceonourworld.TheTelephoneThetelephonewasinventedbyAlexanderGrahamBellin1876.Beforethetelephonewasinvented,peoplecouldonlycommunicatewithothersbyletterorfacetoface.Thetelephonemadeitpossibleforpeopletotalktoeachotheroverlongdistances.Today,withthedevelopmentoftechnology,thetelephonehasevolved（演变）intosmartphones.Wecannotonlymakecalls,butalsosendmessages,surftheInternet,takephotosanddomanyotherthingswithsmartphones.TheLightBulbThelightbulbwasinventedbyThomasEdisonin1879.Beforethat,peopleusedcandlesoroillampstolightuptheirhomesatnight.Theselightingtoolswerenotonlydim（昏暗的）butalsodangerous.Thelightbulbprovidedasafeandbrightwaytolightuptheworld.Itallowedpeopletoworkandstudyatnight,whichgreatlyimprovedworkefficiency.TheInternetTheInternetwasdevelopedinthe1960s.Itisaglobalnetworkthatconnectscomputersallovertheworld.TheInternethaschangedourdigitallivescompletely.WecanusetheInternettogetinformation,studyonline,shop,watchmoviesandkeepintouchwithfriendsandfamily.Ithasmadetheworldasmallerplace.Theseinventionsshowthewisdomofhumanbeings.Theyhavebroughtgreatconveniencetoourlivesandwillcontinuetoinfluencetheworldinthefuture.Whoinventedthetelephone?ThomasEdison.B.AlexanderGrahamBell.AlbertEinstein.D.IsaacNewton.Whatcouldpeopledowithsmartphonestoday?Onlymakecalls.Onlysendmessages.Makecalls,sendmessages,surftheInternetandsoon.Onlytakephotos.Whywasthelightbulbagreatinvention?BecauseitwasinventedbyThomasEdison.Becauseitwasdimanddangerous.Becauseitprovidedasafeandbrightwaytolightuptheworld.Becauseitallowedpeopletocommunicateoverlongdistances.WhenwastheInternetdeveloped?A.In1876.B.In1879.C.Inthe1960s.D.Inthe1990s.Whatisthemainideaofthepassage?Thehistoryofinventions.Threeamazinginventionsthatchangedtheworld.Thedevelopmentoftechnology.Theinfluenceofdigitalproducts.Passage3MyExchangeTriptoCanadaLastyear,IwentonanexchangetriptoCanada.Itwasoneofthemostunforgettableexperiencesinmylife.Beforethetrip,Iwasveryexcitedandalittlenervous.Ipreparedalotforit.IlearnedaboutCanadiancultureandcustomsbyreadingbooksandsurfingtheInternet.IalsopracticedmyEnglishhard,becauseIwantedtocommunicatewithlocalpeoplesmoothly.WhenIarrivedinCanada,Ilivedwithalocalfamily.Thefamilywasverykindtome.Theyshowedmearoundtheircityandtookmetomanyinterestingplaces,suchasmuseums,parksandzoos.IlearnedalotaboutCanadianhistoryandculturefromthem.alsostudiedinaCanadianmiddleschool.Theschoollifetherewasdifferentfromours.Theclassesweremorerelaxedandinteresting.Theteachersencouragedstudentstoaskquestionsandexpresstheirownideas.Imademanynewfriendsthere.Weoftendiscussedourfavoritesubjects,hobbiesanddailylives.MyfriendTomlikescollectingstamps,andheshowedmehiscollection.ItoldhimaboutmypetdogandhowItakecareofit.Duringthetrip,IalsoimprovedmyEnglishalot.IcouldspeakEnglishmorefluentlyandconfidently.Ialsolearnedtobeindependent.Ihadtotakecareofmyself,suchasmakingmybedandwashingmyclothes.Theexchangetripwasawonderfulexperience.Ithelpedmeopenmyeyesandlearnalot.Iwillneverforgetit.Howdidthewriterpreparefortheexchangetrip?ByreadingbooksandsurfingtheInternet.BytravelingaroundCanada.Bylivingwithalocalfamily.BystudyinginaCanadianschool.Wheredidthewriterliveduringthetrip?Inahotel.Inaschooldormitory.Withalocalfamily.Withhisfriends.WhatwastheschoollifelikeinCanada?Strictandboring.Relaxedandinteresting.Difficultandtiring.Easyanduseless.Whatdidthewriterlearnfromtheexchangetrip?Helearnedtocollectstamps.Helearnedtotakecareofpets.HeimprovedhisEnglishandlearnedtobeindependent.Helearnedtomakebedsforothers.Whatdoesthewriterthinkoftheexchangetrip?Unforgettableandwonderful.Boringandtiring.Difficultandterrible.Meaninglessanduseless.非选择题（共60分）词汇运用（本题共20小题，每小题1分，满分20分）根据句意及首字母提示完成单词。Whenyoumeetanewword,youcanl______itupinadictionary.Therearemanya______numbersinnature.Forexample,thenumberofpetals（花瓣）ofasunflowerisusually34or55.Weshouldusedigitalproductsproperlytomakeourd______livesmoremeaningful.Manygreati______havechangedourworld.Wecan’tlivewithoutthemtoday.Mysisterwillgoonane______triptoEnglandnextyear.Sheislookingforwardtoit.W______countsalotwhenwefacedifficulties.Weshouldthinkcarefullybeforemakingadecision.Doyouknowthes______ofimprovingyourmemory?Pleaseshareitwithus.P______areourgoodfriends.Theycanbringushappinessandhelpusreducestress.It’simportanttolearntocommunicatewithotherse______whenweareonanexchangetrip.TheInternethelpsusgetallkindsofi______easilyandquickly.用括号内所给单词的适当形式填空。Mybrotherenjoys______(play)computergames,butheneverspendstoomuchtimeonthem.Thetelephone______(invent)byAlexanderGrahamBellin1876.We______(learn)Englishforsixyears.WecanspeakEnglishfluentlynow.Thisisthebook______(which)myfatherboughtforme.It’sveryinteresting.Ifyou______(want)toimproveyourmemory,youshoulddomoreexerciseandgetenoughsleep.Mypetdog______(follow)meeverywhereIgo.It’sverylovely.He______(notfinish)hishomeworkyet.Heneedstohurryup.Weshouldtakegoodcareof______(we)whenweareawayfromhome.Thelightbulbisoneofthegreatest______(invent)inhistory.Shedecided______(join)anEnglishclubtoimproveherspokenEnglish.V.句型转换（本题共5小题，每小题2分，满分10分）按要求改写下列句子，每空一词。Wecanlookupnewwordsinadictionary.(改为被动语态)Newwordscan____________upinadictionary.Tomhashadhispetcatfortwoyears.(对划线部分提问)____________hasTomhadhispetcat?TheInternethaschangedourlivescompletely.(改为一般疑问句)______theInternet______ourlivescompletely?Heinventedanewmachinelastyear.(对划线部分提问)____________heinventlastyear?Weshouldusedigitalproductswisely.(改为同义句)We____________tousedigitalproductswisely.VI.书面表达（本题共1小题，满分30分）假设你是李华，你的英国笔友Peter来信询问你最喜欢的发明。请你根据以下要点给他写一封回信，介绍你最喜欢的发明及相关情况。要点：1.你最喜欢的发明是什么；它是谁发明的（如果知道）；它的用途和给人们生活带来的影响；你喜欢它的原因。要求：1.词数80-100词；条理清晰，语句通顺，语法正确；文中不得出现真实的人名、校名等相关信息。参考答案I.单项选择（15分）1-5:ACBAB6-10:BABAB11-15:CBCBAII.完形填空（15分）16-20:ABCAD21-25:BCBCBIII.阅读理解（30分）26-30:BCACC31-35:BCCCB36-40:ACBCA词汇运用（20分）41.look42.amazing43.digital44.inventions45.exchange46.Wisdom47.secret48.Pets49.effectively50.information51.playing52.wasinvented53.havelearned54.which55.want56.follows57.hasn’tfinished58.ourselves59.inventions60.tojoinV.句型转换（10分）61.belooked62.Howlong63.Has;changed64.Whatdid65.aresupposedVI.书面表达（30分）参考范文：DearPeter,’mgladtoreceiveyourletter.Youaskedaboutmyfavoriteinvention.Myfavoriteinventionisthesmartphone.AlthoughIdon’tknowwhoinventeditexactly,ithaschangedourlivesalot.Wecanusesmartphonestomakecalls,sendmessages,surftheInternetandtakephotos.Italsohelpsusstudyonlineandshopeasily.likeitbecauseit’sveryconvenient.Itallowsmetokeepintouchwithmyfriendsandfamilyanytimeandanywhere.Italsomakesmydigitallifemorecolorful.What’syourfavoriteinvention?Pleasetellmeinyournextletter.Yours,LiHua评分标准：内容完整（10分）：涵盖所有要点，内容充实，符合要求。语言表达（10分）：语法正确，语句通顺，用词恰当，无拼写错误。结构条理（6分）：格式正确，条理清晰，过渡自然。词数要求（4分）：80-100词，符合要求。2025-2026学年秋沪教版（新教材）初二英语上学期期末质量检测卷附答案（二）单项选择（共15小题，每小题1分，满分15分）从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。—Whenyoudon'tknowaword,youcan_______itupinadictionary.—Yes,that'sagoodlearninghabit.A.lookB.takeC.putD.giveThereare_______ofstarsinthesky,andwecan'tcountthemall.A.millionB.millionsC.twomillionD.twomillionsWe_______digitalproductsforalongtime.Theymakeourliveseasier.A.useB.usedC.haveusedD.willuseThesmartphoneisoneofthemostimportant_______inthe21stcentury.A.inventionsB.inventionC.inventorD.inventors—I_______toLondonforanexchangetripnextmonth.—Congratulations!You'llhaveagreattime.A.goB.wentC.havegoneD.willgo_______youfacedifficulties,remembertostaycalmanduseyourwisdom.A.WhenB.BeforeC.AfterD.UntilIt'shelpfultomakewordcards_______improveyourmemoryofnewwords.A.sothatB.inordertoC.assoonasD.eventhoughManypeoplelikekeepingpetsbecausetheycan_______happinesstotheirowners.A.bringB.takeC.carryD.fetch—_______haveyoukeptthispetdog?—Forthreeyears.It'slikeafamilymembertome.A.HowsoonB.HowlongC.HowoftenD.HowmanyYou_______playwithfirewhenyouarealoneathome.It'sextremelydangerous.A.needn'tB.shouldn'tC.mustn'tD.can'tThestory_______bymygrandmalastnight.Itwasveryinteresting.A.toldB.wastoldC.istoldD.tells—Wouldyouliketogotothesciencemuseumwithme?Therearemanynewinventionsonshow.—I'dloveto,_______Ihavetofinishmyreportondigitallivesfirst.A.andB.butC.orD.soMybrotherisinterestedin_______aboutamazingnumbers.Hereadsalotofbooksonthat.A.learnB.learnsC.learnedD.learning—_______isthebestwaytoimproveyourmemory?—Ithinkreviewingwhatyou'velearnedregularlyisthebestway.A.WhatB.HowC.WhereD.When—IwonfirstprizeintheEnglishspeechcontestaboutinventions.—_______!Youreallydidawonderfuljob.A.GoodluckB.BestwishesC.CongratulationsD.Welldone完形填空（共10小题，每小题1.5分，满分15分）阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。Lastyear,IhadanunforgettableexchangetriptoAustralia.Itnotonlybroadenedmyhorizonsbutalsotaughtmealotaboutlife.Letmesharemyexperiencewithyou.

Beforethetrip,Iwasalittlenervousbecauseitwasmyfirsttimegoingabroadalone.MyEnglishteachertoldmeto21adictionarywithmesothatIcouldlookupnewwordswhenneeded.Shealsoadvisedmetokeepadiarytorecordmydailylifethere.

WhenIarrivedinAustralia,myhostfamilywelcomedmewarmly.Theywereverykindandpatient.Atfirst,IhadsometroublecommunicatingwiththembecauseofmypoorspokenEnglish.Buttheyalwayslistenedcarefullyandencouragedmetospeakmore.Gradually,myEnglishimprovedalot.

Duringmystay,Iwenttoschoolwithmyhostbrother.Theschoolwasverydifferentfromours.Theyhadmanyinterestingcourses,suchasdigitaltechnologyandinventiondesign.Ievenjoinedaclubabout22.Welearnedhowtousesomesoftwaretodesignsimpleinventions.Itwasreallyamazing.

Onweekends,myhostfamilytookmetovisitmanyplaces.WewenttotheSydneyOperaHouseandtheGreatBarrierReef.Iwasdeeplyimpressedbythebeautifulscenery.WhatsurprisedmemostwasthatmanyAustralianslikekeepingpets.Almosteveryfamilyhadadogoracat.Theytreatedtheirpetsas23members.

Oneday,wefoundalostdogonthestreet.Wetookittotheanimalsheltertogether.Theworkerstheretoldusthatit'simportantto24animals.Thisexperiencemademerealizethatpetsareourfriends.

AfterreturningtoChina,IoftenthinkofmyhostfamilyandthewonderfuldaysinAustralia.Thistriptaughtmethatwisdomandcouragecanhelpusovercomedifficulties.Italsomademeknowthatculturalexchangeisagoodwaytolearnmoreabouttheworld.Iwillneverforgetthis25trip.takeB.bringC.carryD.holdnumbersB.memoriesC.inventionsD.petsfamilyB.schoolC.groupD.teamplaywithB.lookafterC.fightwithD.runafterboringB.terribleC.wonderfulD.difficultbutB.soC.orD.andwhoB.whichC.whatD.whoseinB.onC.atD.foraB.anC.theD./learnB.learnsC.learnedD.learning阅读理解（共20小题，每小题2分，满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。AHowtoLookUpWordsEffectively

LookingupwordsinadictionaryisabasicbutimportantskillforEnglishlearners.However,manystudentsdon'tknowhowtodoiteffectively.Herearesomeusefultipstohelpyou.

First,choosetherightdictionary.Therearemanykindsofdictionaries,suchasbilingualdictionaries,monolingualdictionariesandelectronicdictionaries.Bilingualdictionariesaregoodforbeginnersbecausetheytranslatewordsintoyournativelanguage.MonolingualdictionariesarebetterforintermediateandadvancedlearnersastheycanhelpyouimproveyourEnglishexpression.Electronicdictionariesareconvenientbecauseyoucancarrythemanywhere.

Second,decidewhentolookupaword.Don'tlookupeverynewwordyoumeetwhilereading.Iftheworddoesn'taffectyourunderstandingofthemainidea,youcanguessitsmeaningfirst.Youcanmarkthewordandlookituplater.Thisway,youwon'tbreakyourreadingflow.

Third,payattentiontothedetails.Whenyoulookupaword,don'tjustreadthefirstmeaning.Awordmayhavemultiplemeaningsanddifferentpartsofspeech.Youshouldfindthemeaningthatfitsthecontext.Also,learnaboutitspronunciation,collocationsandexamplesentences.Forexample,theword"run"hasmanymeanings.Youneedtofindtherightoneaccordingtothesentence.

Fourth,makegooduseoftheinformation.Afterlookingupaword,writeitdowninanotebookwithitsmeaning,examplesentenceandcollocation.Reviewitregularlytorememberitwell.Youcanalsomakewordcardstoreviewanytime.

Byfollowingthesetips,youcanlookupwordsmoreeffectivelyandimproveyourEnglishlearningefficiency.Whatkindofdictionaryisgoodforbeginners?Monolingualdictionaries.B.Bilingualdictionaries.Electronicdictionaries.D.Advanceddictionaries.Whenshouldwelookupanewwordwhilereading?Everytimewemeetanewword.B.Whenitaffectsourunderstandingofthemainidea.Beforereadingthepassage.D.Afterfinishingthewholepassage.Whatdetailsshouldwepayattentiontowhenlookingupaword?①Itsmeaning②Itspronunciation③Itscollocations④ItsexamplesentencesA.①②③B.①②④C.①③④D.①②③④Howcanwerememberanewwordwellafterlookingitup?Readitsfirstmeaningonly.B.Writeitdownandreviewregularly.Lookitupagainimmediately.D.Ignoreitscollocationsandexamples.What'sthemainideaofthepassage?Theimportanceofdictionaries.B.Howtochooseagooddictionary.Howtolookupwordseffectively.D.Differentkindsofdictionaries.BAmazingNumbersinOurLife

Numbersareeverywhereinourlife.Somenumbersareveryamazingandhavespecialmeanings.Let'slearnaboutsomeofthem.

First,thenumber"7"isconsideredaluckynumberinmanycultures.Therearesevendaysinaweek,sevencolorsinarainbowandsevencontinentsintheworld.Insomecountries,peopleliketochoosethenumber7whenbuyinglotteryticketsorchoosingaphonenumber.

Second,thenumber"108"isveryimportantinChineseculture.ItisacommonnumberinBuddhism.Thereare108beadsonaBuddhistrosary.Also,theSummerPalaceinBeijinghas108bridges.Somepeoplethinkthat108representsgoodluckandprosperity.

Third,thenumber"0"isoneofthegreatestinventionsinhumanhistory.Beforetheinventionof"0",peoplefounditdifficulttorecordnumbers.With"0",wecanrepresentemptyquantitiesandmakemathematicalcalculationseasier.Itiswidelyusedindigitalproductsandscientificresearchtoday.

Fourth,thenumber"pi(π)"isanamazingmathematicalnumber.Itrepresentstheratioofacircle'scircumferencetoitsdiameter.Itsvalueisapproximately3.1415926535...Itisanirrationalnumber,whichmeansithasaninfinitenumberofdigitsafterthedecimalpoint.Mathematicianshavebeenstudyingpiforthousandsofyears.

Numbersarenotjusttoolsforcounting.Theycarryrichculturalandscientificmeanings.Learningaboutamazingnumberscanmakeusmoreinterestedinmathematicsandtheworldaroundus.Whyisthenumber"7"consideredlucky?Becauseitisusedinlotterytickets.B.Becauseithasspecialculturalmeanings.Becauseitisthelargestnumber.D.Becauseitiseasytoremember.Whatdoesthenumber"108"representinChineseculture?A.Badluck.B.Sorrow.C.Goodluckandprosperity.D.Difficulty.Whatistheadvantageoftheinventionof"0"?Itmakesmathematicalcalculationseasier.B.Itisusedinallcultures.Itisthelargestnumber.D.Itrepresentssevencontinents.Whatkindofnumberispi(π)?Arationalnumber.B.Anirrationalnumber.Awholenumber.D.Anegativenumber.What'sthemainideaofthepassage?Thehistoryofnumbers.B.Howtousenumbersinlife.Amazingnumbersandtheirspecialmeanings.D.Theimportanceofnumbersinmathematics.CTheImpactofDigitalLivesonTeenagers

Withthedevelopmentoftechnology,digitalproductshavebecomeanimportantpartofteenagers'lives.Theybringmanybenefitsbutalsosomeproblems.Let'sdiscusstheimpactofdigitallivesonteenagers.

Ontheonehand,digitalliveshavemanyadvantages.First,digitalproductsmakelearningeasier.Teenagerscanuseonlinecoursestolearnknowledgeanytimeandanywhere.TheycanalsolookupinformationquicklyontheInternetwhendoinghomework.Second,digitalproductshelpteenagerskeepintouchwithfriendsandfamily.Theycanusesocialmediaappstochat,sharephotosandvideos.Eveniftheyarefaraway,theycancommunicateeasily.Third,digitalproductsprovideentertainment.Teenagerscanplayonlinegames,watchmoviesandlistentomusictorelax.

Ontheotherhand,digitallivesalsohavesomenegativeimpacts.First,excessiveuseofdigitalproductsisbadforteenagers'health.Spendingtoomuchtimelookingatscreenscancauseeyestrainandbackpain.Italsoreducesthetimeforphysicalexercise.Second,someteenagersareaddictedtoonlinegames.Thisaffectstheirstudyandsleep.Theymayevenskipclassestoplaygames.Third,thereisalotofbadinformationontheInternet,suchasviolenceandpornography.Itisharmfultoteenagers'mentalhealth.

Howtodealwiththeseproblems?Parentsandteachersshouldguideteenagerstousedigitalproductsproperly.Theyshouldsetatimelimitforusingdigitalproducts.Teenagersthemselvesshouldlearntocontrolthemselves.Theyshouldusedigitalproductstostudyandrelax,nottowastetime.Also,theyshouldlearntotellgoodinformationfrombadinformation.

Digitalproductsaredouble-edgedswords.Ifusedproperly,theycanhelpteenagersgrowbetter.Ifnot,theywillbringmanyproblems.Weshouldmakegooduseofdigitalproductstoimproveourlives.Whatisoneoftheadvantagesofdigitallivesforteenagers?Itcauseseyestrain.B.Itmakeslearningeasier.Itreducesphysicalexercise.D.Itbringsbadinformation.Whatisanegativeimpactofdigitallives?Teenagerscanlearnonlinecourses.B.Teenagerscancommunicateeasily.Someteenagersareaddictedtoonlinegames.D.Teenagerscanwatchmoviestorelax.Whoshouldguideteenagerstousedigitalproductsproperly?Onlyparents.B.Onlyteachers.Parentsandteachers.D.Teenagersthemselves.Whatshouldteenagersdotousedigitalproductsproperly?Spendasmuchtimeaspossibleonscreens.B.Skipclassestoplayonlinegames.Learntotellgoodandbadinformation.D.Ignorethetimelimitsetbyparents.Whatdoestheunderlinedsentence"Digitalproductsaredouble-edgedswords."mean?Digitalproductsareverysharp.B.Digitalproductshavebothadvantagesanddisadvantages.Digitalproductsareusefulforeveryone.D.Digitalproductsareharmfultoteenagers.DTheSecretofaGoodMemory

Haveyoueverwonderedwhysomepeoplehaveagoodmemorywhileothersdon't?Isthereasecrettoimprovingmemory?Theanswerisyes.H