Unit4AmazingScienceTopic1Whenwasitinvented?SectionD•What’situsedfor?•It’susedforlisteningtomusic.•What’sitmadeof?•It’smadeofplastic.•Wherewasitinvented?•ItwasinventedinKorea.•Whenwasitinvented?•Itwasinventedin1998.listentomusic/plastic/Korea/1998•What’situsedfor?•It’susedforcommunicatingeasily.•What’sitmadeof?•It’smadeofplasticandmetal.•Wherewasitinvented?•ItwasinventedinAmerica.•Whenwasitinvented?•Itwasinventedin1973.communicateeasily/plasticandmetal/America/1973What’sthis?What’situsedfor?1.Howdidtheearlyexplorersknowwheretheywere?Theyfoundoutwheretheywerebyusingstars.2.What’sthedisadvantageofusingthestarsasguidingmarks?Itsdisadvantageisthatitdidn’tworkwellwhentheweatherwasbadandthestarscouldnotbeseen.ReadthepassageanddiscussthequestionsonPage88.3.WhatisaGPS?Isitusefultous?Itislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Itisveryuseful.4.WhatdoyouthinktheGPSwillbeusedforinthefuture?…ReadthepassageKeypoints根据首字母提示，完成短文。ThankstoGPS,wecanexactlyknoww_____wearenow.GPSislikeaman-made“star”.Itcanbeu____inanyplaceandanyweatherconditiontofindoutourp________.Inthepast,theearlyexplorershadtousestarsinthes____totellthemwheretheywere,however,thismethoddidn’tworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere________ourplanets.hereositionsedkyxploreGrammarPassiveVoice()ⅡTheradiowasinventedbyGuglielmoMarconiin1895.Whenwasthedigitalcameradeveloped?Wherewasitdeveloped?Whatisarocketusedfor?Itwasdevelopedinthe1970s.ItwasdevelopedinJapan.Itisusedforsendingsatellitesorspaceshipsintospace.FunctionsIwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.It’ssaidthatheinventedmorethantwothousandthingsduringhislife.Inventingisinterestingandexcitingandeveryonecanbeaninventor.1.Youarelate,allthetickets__________(sell)outanhourago.2.Thistypeofcellphone____________(make)inShenzhen.3.I_________________(notinvite)toyesterday’sparty.4.________thosemachines__________(check)thismorning?5.Manytreesandflowers______________(plant)inourschoollastyear,andtheymadeourschoolabeautifulgarden.weresoldwasmadewere/was+v.的过去分词wasn’tinvitedWerecheckedwereplanted1.PeopleusedradiostolearnEnglishinthepast.__________________________________________2.Jackwillshowmethephoto.__________________________________________3.TheyhaveraisedmuchmoneyfortheProjectHope.__________________________________________RadioswereusedtolearnEnglishinthepast.ThephotowillbeshowntomebyJack.MuchmoneyhasbeenraisedfortheProjectHope.ChangethefollowingsentencesintoPassiveVoice.4.IoftenhearMarysingEnglishsongsathome.___________________________________5.Wemustn’tthrowlitterabout.___________________________________6.PeoplecanvisitplanetslikeMars.___________________________________MaryisoftenheardtosingEnglishsongsathome.Littermustn’tbethrownabout.PlanetslikeMarscanbevisited.()1.Hurryup,you____onthephone.A.WantedB.waswantedC.arewanted()2.Somestories_____thechildrenbytheteachereveryday.A.istoldforB.aretoldforC.aretoldto()3._____thathehasstudiedabroadforfiveyears.A.ItissaidB.ItsaysC.Thatissaid()4.Thewindow____fiveminutesago.A.iscleanedB.wascleanedC.canbecleaned()5.Thechildren______bytheteachersatschool.A.takecareofB.aretakencareC.aretakencareofCCABCChoosethebestanswer.()6.Ihavenoideawhat______whileIwasasleep.A.happenedB.washappenedC.happens()7.Insomecountries,tea_____beforemeals.A.isservingB.isservedC.served()8.Thiskindofbooks______well.A.doesn’tsellB.isn’tsellingC.aren’tsold.()9.I______tenminutestodecidewhichsentencewasrightbytheteacher.A.gaveB.wasgivenC.wasgiving()10.Teachers______ineverypartoftheworld.A.areneedingB.areneededC.willneedABABBWeLearn:1.Somewords:mark,explorer2.Somephrases:findout,in…direction,aslongas,workwell,therestofthetime,beusedto,theshapeof3.Somesentences:Thismethodworkedwellatnightaslongastheweatherwasgoodandthestarscouldbeseen.Wecan:1.Usethepassivevoiceofthesimplepasttensemoreproperly.2.TalkaboutnewtechnologyGPS.3.Developeourimaginationandcreativitybydesigningourowninventions.Thankyou
