Unit6Whenwasitinvented课件英语人教版九年级全一册

探究点一inventv.发明IthinktheTVwasinventedafterthecar.我认为电视是在汽车之后被发明的。Unit6Whenwasitinvented第1课时SectionA(1a-2d)点睛beinvented是invent的被动语态结构,意为“被发明”。常用结构有:beinventedin...被发明于……;beinventedby...由……发明。TheelectriclightbulbwasinventedbyEdison.爱迪生发明了电灯泡。拓展invent的两个名词分别为:inventor发明家;invention发明。Edisonwasagreatinventor.Hehadmorethan1,000inventionsinhislifetime.爱迪生是一位伟大的发明家。他一生中有一千多项发明。1.WeChineseshouldbeproudofourhistory,ourwrittenlanguage,our

。andourachievements.(invent)(2022永州)

2.Benisinterestedinphysicsandwantstobean

inthefuture.(invent)

3.Paper

inancientChinamorethan2,000yearsago.(2022平凉)

A.invented B.wasinventedC.invent D.isinventedinventionsinventor探究点二beusedfor被用来于……Whataretheyusedfor它们是用来做什么的点睛beusedfordoingsth.与beusedtodosth.同义,意为“被用来做某事”。Thisscoopisusedforservingcoldice-cream.=Thisscoopisusedtoservecoldice-cream.这个勺子是被用来挖取冷冰激凌的。

拓展1.beusedas被用作……Theumbrellacanbeusedasawalkingstick.伞可以用作拐杖。2.beusedby被……使用Englishiswidelyusedbypeoplearoundtheworld.英语被世界各地的人们广泛使用。1.—Whatisthestamp

—Sendingaletter.A.usedfor B.madeofC.usedby D.madefor2.Thegloveskeephandswarm.

A.usedto B.areusedtoC.areusedfor D.usedfor3.Englishisusedasecondlanguagemanypeople.

A.as;for B.as;byC.for;byD.by;as探究点三withpleasure很荣幸;非常愿意—Canyouhelpmethinkofaninvention——你能帮我想出一项发明吗—Withpleasure!——非常愿意!点睛用法例句pleasure可用作不可数名词,意为“高兴;愉快”,也可用作可数名词,意为“快乐的事”It’sapleasuretomeetyou.很高兴遇见你。Withpleasure.意为“很荣幸;非常愿意”,与Allright./Noproblem./I’dliketo.等意思相同,表示乐意接受或同意对方的请求Certainly,withpleasure.当然可以,非常乐意。Mypleasure.意为“不客气”,主要用作对对方致谢时的客气答语,也可用Itismy/apleasure.—Thankyouforyourhelp.—Mypleasure.——谢谢你的帮助。——不客气。1.—Ruby,couldyoupleasehelpmesolvetheseproblems—,butstillhalfareleftforyoutodobyyourself.(2022达州)

A.Idon’tthinkso B.IhopenotC.Withpleasure D.It’smypleasure2.—Thankyouforshowingmearoundyourbeautifulcity.Iloveitsomuch.—WearelookingforwardtoyournextvisittoBinzhou!(2022滨州)

A.Nevermind. B.Allright.C.That’sright. D.Mypleasure.1.Whenwearrived,thewentoff.Itwasdarkeverywhere.(electric)

2.Zippersarewidelyusedinourlives.(day)

3.Whatdoyouthinkisthegreatestofthetwentiethcentury(invent)

4.Knivesareusedforthings.(cut)

5.Hedidn’tshowanywhenIofferedtogowithhim.(please)

Ⅰ.根据句意,用括号中所给词的适当形式填空

electricitydailyinventioncuttingpleasure6.Kevin

anotherwaytodealwiththeproblemjustnow.(想起)

7.Thewoodis

makingdesks.(用于)

8.Thezipperwasn’tpopular

.(在那时)

9.Tom

havingatriptoBeijinglastweek.(考虑)

10.—Healwaysappearsto

.(有道理)

—That’sbecausehe’sreallyknowledgeableandexperienced.Ⅱ.将下列句子中汉语部分译成英语,注意使用适当的形式thoughtofusedforatthattimethoughtabouthaveapoint()11.Welcometoourclothingstore.Wehavemany

ofskirts.

A.styles B.sizeC.color D.bills()12.

[时事热点]China’sthird-generationnucleartechnologyHualongOne(华龙一号)

intouse,whichcouldallowChinatousemorecleanenergy.A.hasputB.willputC.isputtingD.wasput()13.Jiangnan,afamousareainChina,haslongbeen

inmanyChinesepoems(诗)foritsbeautifulstyle.(2022成都改编)

A.mentioned B.noticedC.admired D.missedⅢ.单项填空ADA()14.Thewoman

allthethingsshehadtorememberonthepapertomakethemlookclear.

A.processed B.reviewedC.listed D.checked()15.—TheLawonFamilyEducationPromotion(家庭教育促进法)

onOct.23,2021.

—Yeah!Itcameintoeffect(生效)onJan.1,2022.(2022鄂州)A.passes B.waspassedC.passed D.passCB[创造思维]Natureisfullofgreatideas.Manyinventorswatchnatureforideastomakesome

1

things.

Forexample,anewtypeofcane(手杖)wasinventedtohelpblindpeoplemovearoundmore

2

.Andtheideabehindthisinventioncamefromthebat.

HowBatsGetAround

Batsmakesoundswhentheyflyatnight.Thesesoundscan’tbeheardbypeople

3

theyhelpbatsflyinthedark.

Batssendoutsoundwaves(波)throughtheirmouthsornoseswhentheyfly.Ifthesesoundwaves

4

objectsaroundthem,theywillbesentbackasanecho(回声).Theechotellsbatshowfarawaythings

5

treesare.Italsohelpsthemknow

6

tofindsomethingtoeat.完形填空ABattyIdeaAfterwatchinghowbatsfly,thescientistwhoinventedthenewcanefirstbuiltalightweightcane,andthentoithe

7

adevice(装置)thatsendsandreceivesthesamesoundwavesasbatsdowhileflying.Finally,he

8

thecane.Itworkedout!

HowtheCaneWorksThecanesendsoutsoundwaves.Whenanechoissentback,thetopofthecanevibrates(震动).Thishelpstheperson

9

thecaneknowhowfarawayanobjectis.Heorshewillalsoknowhowbigtheobjectis.

The

10

ofthecaneshowsthatnatureisreallywheregreatideascomefrom.()1.A.useful B.interestingC.important D.private()2.Afortably B.quicklyC.wisely D.smoothly()3.A.because B.soC.although D.but()4.A.find B.hitC.reach D.explore()5.A.like B.belowC.above D.as()6.A.how B.when C.where D.what()7.A.designed B.addedC.increasedD.improved()8.A.used B.producedC.tested D.sold()9.A.making B.holdingC.followingD.trying()10.A.instruction B.informationC.inventionD.introductionADDBACBCBC探究点一Itissaidthat...据说……ItissaidthataChineserulercalledShenNongwasthefirsttodiscoverteaasadrink.据说一位叫神农的中国统治者最早发现了茶可以饮用。第2课时SectionA(3a-4c)点睛Itissaidthat...意为“据说……”,that后接完整的句子,其中it是形式主语,that从句是真正的主语。

拓展其他类似的表达:Itisbelievedthat...人们认为……Itisexpectedthat...据预计……Itisreportedthat...据报道……Itissupposed∕thoughtthat...据猜测……Itisknownthat...众所周知……1.teawasinventedbyaccidentaboutfivethousandyearsago.(据说)(2022朝阳改编)

2.—Whatdoyouthinkofthisfootballmatch—Ihavenoidea.ButisbelievedthattheSpanishteamwillwin.

A.that B.this C.which D.itItissaidthat探究点二smelln.气味Itproducedanicesmell...它产生了一种好闻的气味……点睛smelln.气味,既可以作可数名词,也可以作不可数名词。

拓展smell还可以作系动词,意为“闻起来”,后跟形容词作表语。Theflowerssmellsweet.花儿闻起来很香甜。1.—Hmm,somethingsogood.Whatisit

—Hand-madecake.Comeandtrysome.(2022北部湾改编)A.tastes B.sounds C.smells D.feels2.Thereisaterribleintheroom.Pleaseopenthewindow.

A.sound B.shape C.sleep D.smell探究点三takeplace发生;举行;举办TheteatradefromChinatoWesterncountriestookplaceinthe19thcentury.从中国到西方国家的茶叶贸易出现在19世纪。点睛辨析takeplace与happen不同点takeplace意为“发生;举行;举办”,一般指非偶然性事件的“发生”,即这种事件的发生一定有某种原因或经过事先安排Thesportsmeetingwilltakeplacenextweek.运动会将于下周举行。happen也指“发生”,但一般指偶然事件的“发生”,主语为“事”What’shappeningoverthere?那边发生了什么事?相同点无被动语态1.Greatchanges

inLianyungangsinceImovedhere.(发生)

(2022连云港改编)

2.Trafficaccidents

everydaybecauseoflookingatmobilephones.

A.takeplaceB.happen

C.aretakenplace D.arehappenedhavetakenplace探究点四remainv.保持不变;剩余Sometealeavesfromatreeplantfellintothewaterandremainedthereforsometime.一些茶树的叶子掉进了水里,并在那里停留了一段时间。点睛remainv.意为“保持不变;剩余”,相当于“stay”。HowlongwillyouremaininShanghai你将在上海待多长时间拓展remain还可用作连系动词,意为“保持(某种状态);继续存在;仍然是”,后面接形容词、名词、分词、不定式或介词短语。Nomatterwhatweaskedher,sheremainedsilent.无论我们问她什么,她都不说话。1.Heremained

(stand)therealthoughwerepeatedlyaskedhimto\sitdown.

2.Toremain

,youshoulddomoreexerciseandeatlessjunkfood.

A.health B.healthyC.healthily D.unhealthystanding1.Thebell

justnow.(ring)

2.Thekingisnotthereal

ofthecountry.(rule)

3.DoctorZhongNanshanisoneofour

heroes.(nation)

4.The

ofcomputersmakestheworldbecomesmallerandsmaller.(popular)

5.Thepianoisapopular

instrument,butit’skindofexpensive.(music)Ⅰ.根据句意,用括号中所给词的适当形式填空

rangrulernationalpopularitymusical6.TheWinterOlympicGames

inBeijingin2022.(发生)

7.Becareful!Youmightcutyourself

.(意外地)

8.

,ifyouwanttoachieveyourdream,youmusttryyourbest.(毫无疑问)

9.

,Iheardachildcryinginthepark.(突然)

10.

cookingwillbeabasicskillforpupilsfromnextterm.(据说)(2022恩施改编)

Ⅱ.将下列句子中汉语部分译成英语,注意使用适当的形式tookplacebyaccidentWithoutdoubtAllofasudden/SuddenlyItissaidthat()11.I’mveryhungrynow!Iwanttohavesomefirst.

A.juice B.biscuitsC.coffee D.water()12.—Look,Linda.Theflowersinourclassroomcameoutinonenight.—Ican’tbelieveit.Theyarebeautifulandcolorful.Theygreat.

A.sound B.smellC.taste D.see()13.[跨历史学科]—Whichcountrymadepaperfirstintheworld—

A.India. B.Egypt.C.England. D.China.Ⅲ.单项填空BBD()14.—Ourclassroomissoclean.Who’scleanedit,LiFei—Sorry,Idon’tknow.Ithinkdiditbeforeclass.

A.somebody B.nobodyC.everyone D.anyone()15.Iaskedheraquestion,butshesilent.

A.replied B.remainedC.required D.repeatedAB阅读理解(2022德阳改编)[创造思维]HaveyoueverimaginedyoursimpleT-shirtcouldactasanairconditioner(空调)onthosehotsummerdaysThankstoadiscovery,thatpossibilityisgettingcloserandtheT-shirtmaysoonbefoundamongyourfavoriteclothingbrands.Twoinventorstookacompletelynewmethod(方法).Theydesignedaspecialtextile(纺织品)thatcantakeinbodyheatandthensendouttheenergy.Thisnewtextilecoolsboththeobjectsandthingsaroundthemthroughatechnology.ThismeansthataT-shirtmadeofthistextilelookslikeanormalT-shirt,butactuallyitisadevicethatworkslikeamirror.

Althoughthetechnologyisnotnewandhasbeenusedforyearstodesignplasticfilmsandspecialpaints,itsuseinthetextileindustryforthegoodofwearersisveryspecialandexciting.Thatisbecause,inthepast,themethodsweusedtodealwithheatthroughclotheswereonlythesuggestionsonwearinglightcolorsandchoosingbreathabletextiles.Butevenwhenthesesuggestionscanactuallyhelpyoufeelcool,theyaresimplynotenoughinthehottestseason.Thenewtextile,however,canreflectallkindsoflight,andthiscancontributeto(促进)thecoolingprocess.Sothisdiscoveryisarealadvance.Thetwoinventorsarenowlookingoutforclothingbrandsthatareinterestedinusingtheirtextile.Oneinventorsaid,“EverybodycanaffordaT-shirtmadeofthistextileandthecostisbasicallythesameasanormalT-shirt’s.Itcandogoodtoeverybody.”

()1.WhatcanthenewtextiledoA.Makewearersfeelcool. B.Makewearersfashionable.C.Getwearers’healthinformation.D.Testwearers’bodytemperatures.()2.Theunderlinedword“device”inParagraph2means“”inChinese.

A.装饰 B.家具 C.设备 D.记号()3.Thisnewtextileisarealadvancebecause.

A.ithasbeenusedforyearstodesignplasticfilmsB.itcanreflectallkindsoflightandcontributetothecoolingprocessC.everybodycanaffordaT-shirtmadeofthistextileD.itsuseinthetextileindustryforthegoodofwearersisveryspecialACB()4.WhatarethetwoinventorsdoingnowA.Makingmoneybysellingthetextile.B.Tryingtousethetextileinotherfields.C.Tryingtofindoutmoresecretsofthetextile.D.Lookingforclothingbrandstousethetextile.()5.What’sthebesttitle(标题)forthetextA.APopularBrand B.TwoGreatInventorsC.ASpecialTextile D.LuckyWearersDC1.Lauraaddedtoomuchsaltinthesoup.Nowittastestoo

.(salt)

2.Angela,Iwant

Russiansoup.(make)

3.Manynaturaldisastersalwayshappen

,soit’sdifficulttoknowwhentheywillcome.(sudden)

4.Thesupermarketisusuallycrowdedwith

onweekends.(customer)

5.Thepotatochipswereinventedbyacook

GeorgeCrum.(call)

Ⅰ.根据句意,用括号中所给词的适当形式填空

salty第3课时SectionB(1a-1e)tomakesuddenlycustomerscalled6.Whohastakenmybook(错误地)

7.Thecustomerthoughtthepotatochipswere.(不够薄)

8.Tomcuthisfinger.(意外地)

9.Thecustomerwashappy.(最后)

10.Theycookedthemeat.(很长一段时间)Ⅱ.将下列句子中汉语部分译成英语,注意使用适当的形式bymistakenotthinenoughbyaccidentintheend/atlastforalongtime根据短文内容,判断正误(正确“T”,错误“F”)。

Itiswell-knownthatsilkwasdiscoveredinChina.Itiswonderfullystrong,lightandsoft.Asoneofthebestmaterialsforclothes,silkhasaperfectlookandfeelthatnoothermaterialscanmatch.Thereisastoryabouthowsilkwasdiscovered.LeiZu,thewifeofHuangDi,washavingteaunderamulberrytree(桑树)whenasilkwormcocoon(蚕茧)fellintohercup.Asshetriedtotakethecocoonout,itstartedtounwind(展开)andthe“line”seemedendless.Sherealizedthatthestronglinecouldbeusedtomakeclothes.ThenLeiZutaughtherpeoplehowtoraisesilkwormsandhowtogetsilk.Inthisway,thesilkindustrywasborn.阅读理解

(2022江西)

Forhundredsofyearsafterthat,silkwasonlyusedbyrichpeople.Itwasasymbolofidentityandstatus(身份和地位).Withthedevelopmentofthesilkindustry,moresilkwasproduced.Itwasnolongerjustforrichpeople.IntheHanDynasty,silkwastransportedasfarawayasSpain,Romeandmanyothercountries.ThetraderoadwasfamouslyknownastheSilkRoad,whichconnectedChinawiththerestoftheworld.Today,silkcanbeusedformanykindsofthings,notjustforclothesbutalsoforpaintings,writingbrushes,kitesandevenfishingnets.Whereversilkgoesaroundtheworld,itisalwayswarmlyreceived.()1.Silkisoneofthebestmaterialsforclothes.()2.HuangDidiscoveredsilkcouldbeusedtomakeclothesbyaccident.()3.Asmoresilkwasproduced,itreachedmorepeople’shomes.()4.ThesilkindustrywasbornbecauseoftheSilkRoad.()5.Thispassagemainlytalksaboutthehistoryandthepopularityofsilk.TFTFT探究点一dividev.分开;分散第4课时SectionB(2a-2e)点睛divide的常见搭配有:1.o把……分开Theteacherdividedusintogroupsfordiscussionandstudy.老师把我们分成小组以便讨论和学习。2.bedividedinto被分为Theworldisdividedintosevencontinents.世界被分为七大洲。—Let’s

therubbish

differentkindsbeforethrowingitaway.

—OK.It’sgoodforustousesomeofitagain.A.get;into B.divide;into C.change;into D.look;into探究点二stop...fromdoing...阻止……做……Atthesametime,theyneedtostopthecompetingteamfromgettingtheballintotheirownbasket.同时,他们需要阻止竞争对手将球投进他们自己的篮筐里。点睛stop...fromdoingsth.意为“阻止……做某事”,from为介词,后接动词-ing形式,stop也可换成prevent或keep

拓展stop∕prevent...fromdoingsth.在主动语态中from可以省略,但在被动语态中不能省略。keep...fromdoingsth.中的from不能省略。Hisparentsstophim(from)playingcomputergames.=Heisstoppedfromplayingcomputergamesbyhisparents.他的父母阻止他玩电脑游戏。1.Thetreesandgrasscanstoptherainfrom

awaytheearth.

A.wash B.washing C.towash D.washed2.没有什么能阻止我们实现梦想。Nothingcan

us

ourdreams.

prevent∕stop∕keepfromrealizing∕achieving探究点三notonly...butalso...不但……而且……Basketballhasnotonlybecomeapopularsporttoplay,butithasalsobecomeapopularsporttowatch.篮球不但已经成了一项受欢迎的比赛运动,而且也已经成了一项受欢迎的观赏运动。点睛notonly...butalso...意为“不但……而且……”,在句中常用来连接两个对等的成分,also可以省略。TheclothesinMiller’sarenotonlygoodbutalsocheap.米勒店的衣服不仅好,而且便宜。拓展notonly...but(also)...用来连接两个主语时,谓语动词的单复数要遵循“就近原则”,即和but(also)后的名词或代词的数保持一致。NotonlyTombutalsoJacklikesplayingbasketball.不但汤姆而且杰克也喜欢打篮球。—IoftenseePeter’sfatherplaybasketballonmywaytoschool.—That’snotstrange.NotonlyPeterbutalsohisfather

sports.

A.enjoy B.enjoys

C.enjoyed D.wasenjoyed探究点四thenumberof...……的数量Thenumberofforeignplayers,includingChineseplayers,intheNBAhasincreased.在NBA,外国球员的数量,包括中国球员在内,已经有所增加。点睛辨析thenumberof...与anumberof用法例句thenumberof...意为“……的数量”,后面接可数名词复数,该短语作主语时,谓语动词用单数Thenumberofchildrenintheperformanceisaround100.参与表演的孩子大约100人。anumberof意为“几个;若干”,相当于several,后面接可数名词复数作主语时,谓语动词用复数形式。如果强调数量大,还可在number前用large,great等词修饰,表示程度Alargenumberofyoungpeoplearecrazyaboutthis3Dgame.大量的年轻人对这款3D游戏很着迷。1.Thenumberofthewhales

smallerandsmallerbecauseofhumanactivitiesnow.

A.were B.was C.is D.are2.Inourschoollibrary,there

anumberofbooksonart.Thenumberofthebooks

stillgoinglargerandlarger.(2022黔东南)

A.is;is B.are;isC.is;are D.are;are1.BothLinZexuandQiJiguangare

inpeople’shearts.(hero)

2.Nothingwouldstophimfrom

forthepeople.(work)

3.Annisa

becauseshe’sfromCanada.(Canada)

4.Asa

basketballplayer,hedidwhathecouldtohelphisteamtowinthefinals.(profession)

5.Theboy

Johnhelpedtheoldmancrosstheroad.(name)

Ⅰ.根据句意,用括号中所给词的适当形式填空

heroesworkingCanadianprofessionalnamed6.Sheisamathteacher,and

sheisavolunteer.(同时)

7.ThespiritofclimbersshowsmethatIshouldnevergiveuptryingto

.

(实现我的梦想)(2022枣庄改编)

8.Thestudentsareoften

severalgroupsbytheteacherbeforediscussingthedifficultquestionsinclass.(分开)(2022泰安改编)

9.Manyteenagers

nationalheroesanddreamtobecomelikethem.(仰慕)(2022贵阳改编)

10.He

becomingafamousviolinistoneday.(梦想)Ⅱ.将下列句子中汉语部分译成英语,注意使用适当的形式atthesametimeachieve∕dividedintolookuptodreamsofrealizemydream(s)()11.Wehavealotofthingstodo.Let’sthinkabouthowto

ourtime.

A.list B.divideC.create D.require()12.Thenewyeariscoming.Teachersencourageus

newhobbies.(2022重庆B卷)

A.develop B.developingC.todevelop D.developed()13.Remembertousesunglassestostopthesunfrom

directlyinyoureyes.

A.shine B.shiningC.toshine D.shoneⅢ.单项填空BCB()14.Thenumberoftheteachersinourschool

60andanumberofthem

menteachers.

A.is;are B.are;is C.am;are D.be;are()15.—Mike,pleaseturndownthemusic.

Dabao

Erbaoissleeping.

—Sorry,Iwilldoitatonce.A.Neither;nor B.Either;orC.Notonly;butalso D.Both;andAC阅读理解(七选五)

[传统文化·围棋]Weiqi,asanoldboardgame,wasinventedinChinamorethan2,500yearsago.And1.

.

Theplayingpiecesarecalledstones.Oneplayerusesthewhitestonesandtheother,black.Theplayerstaketurnsplacingthestonesonthegameboard.Asweknow,2.

.Thestonesareplacedonthem.

Weiqiisalsocalledgointheworld.Learningitcannotonlyimprovepeople’slogical(逻辑的)thinkingability,butalso3.

.That’swhyitismoreandmorepopularwithmodernpeople.BDCIntheSuiandTangDynasties,WeiqitraveledtoJapan,andthentoEuropeinthe19thcentury.Nowithasgrownintoanimportantinternationalcompetitionevent.Sofar,4.

.Amongthem,playersfromChina,JapanandKoreahavethehighestlevelofWeiqi.

OnFebruary19,2021,theChinese-EnglishDictionaryofWeiqiTerms(术语)cameoutinBeijing.It’sthefirstprofessionaldictionaryaboutWeiqiinChina.AsasymbolofChineseculture,5.

.Italsohasitsownwayofthinkingandthemethodofcommunicating.ThedictionarywillserveasanecessarytoolandbridgeforspreadingWeiqiculture.

A.WeiqihasitsspeciallanguageB.thegameisplayeduntiltodayC.developtheircalmcharacterD.theboardsurfacehas361crosspointsE.peoplefromover40countrieshaveplayeditF.WeiqihasalonghistoryG.thegamewasjustplayedinancienttimes

EA本单元的话题为“发明”。该话题的写作内容主要包括某项发明的历史、特点、用途、在社会发展中所发挥的作用等。该话题写作常用到被动语态。第5课时SectionB(3a-3b)&SelfCheck话题写作指导1.教材典句改写(1)Isitreallysuchagreatinvention(P42)仿写句:它真是一个很棒的产品!

(2)Didyouknowthattea,themostpopulardrinkintheworld(afterwater),wasinventedbyaccident(P43)仿写句:你知道炸薯片是无意中被发明的吗

Itisreallysuchagreatproduct!Didyouknowthatpotatochipswereinventedbyaccident(3)It’susedforservingreallycoldice-cream.(P44)仿写句:它也可以用来锻炼。

(4)Basketballhasnotonlybecomeapopularsporttoplay,butithasalsobecomeapopularsporttowatch.(P46)仿写句:茶不仅变成了受欢迎的饮品,而且还成了受欢迎的生意。

Itcanalsobeusedforexercise.Teahasnotonlybecomeapopulardrink,butithasalsobecomeapopularbusiness.2.名言名句(1)Laborcreatestheworld.劳动创造世界。(2)Life’sfirstactionistocreate.生命的第一个行动是创造。1.写作要求小小发明,大大改变。我们的生活因为各种科技发明而日益便捷,请你以“MyFavoriteInvention”为题,写一篇80词左右的英语短文,介绍你最喜爱的发明。