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Unit4AmazingScienceTopic1Whenwasitinvented?SectionD•What’situsedfor?•It’susedforlisteningtomusic.•What

’sitmadeof?•It’smadeofplastic.•Wherewasitinvented?•ItwasinventedinKorea.•Whenwasitinvented?•Itwasinventedin1998

.•What’situsedfor?•It’susedforcommunicatingeasily.•What’sitmadeof?•It’smadeofplasticandmetal.•Wherewasitinvented?•It

wasinventedinAmerica.•Whenwasitinvented?•Itwasinventedin1973.Whatmethoddidyouusetofindyourlostcellphone?•

GPSislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Theearlyexplorersusedthestarsaslandma

rkstoknowwheretheywereandinwhichdirectiontheyweregoing.Thismethodworkedwellatnightaslongastheweatherwasgood.Butitdidn’tworksowelldurin

gtherestofthetime.Let’susetheGPS.n.探险者，勘探者•1.Howdidtheearlyexplorersknowwheretheywere?•Theyfoundoutwheretheywerebyusingstars.•2.What’

sthedisadvantageofusingthestarsasguidingmarks?•Itsdisadvantageisthatitdidn’tworkwellwhentheweatherwasbadandthestars

couldnotbeseen.•3.WhatisaGPS?Isitusefultouse?•Itislikeaman-madestar.Wecanuseitatanytime,inanyplaceandina

nyweathertofindoutourposition.Itisveryuseful.•4.WhatdoyouthinktheGPSwillbeusedforinthefuture?•…Readthepassageanddiscussthequestio

nsonPage88.Keywords•explore•explorer,mark•findout,in…direction•workwell,aslongas•therestofthetime•solve,like,use,thes

hapeof•greatinventionn.标示，记号，符号v.做记号，做标记Retellit!根据首字母提示，完成短文。ThankstoGPS,wecanexactlyknoww_____weareno

w.GPSislikeaman-made“star”.Itcanbeu____inanyplaceandanyweatherconditiontofindoutourp________.Inthepast,theearlyexplorershadtouse

starsinthes____totellthemwheretheywere,however,thismethoddidn’tworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere________

ourplanets.hereositionsedkyxploreGrammarPassiveVoice(Ⅱ)TheradiowasinventedbyGuglielmoMarconiin1895.Whenwasthedigita

lcameradeveloped?Wherewasitdeveloped?Whatisarocketusedfor?Itwasdevelopedinthe1970s.ItwasdevelopedinJapan.Itisus

edforsendingsatellitesorspaceshipsintospace.FunctionsIwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.It’s

saidthatheinventedmorethantwothousandthingsduringhislife.Inventingisinterestingandexcitingandeveryonec

anbeaninventor.Passivevoicewas/were+done()1.Abigsupermarket_____inourcitylastyear.A.isbuiltB.werebuiltC.w

asbuilt()2.Couldyoutellmewhotheradio____by?A.inventsB.inventedC.wasinvented()3.Manytreesandflowers_____inourschoollastyear.Theymadeourschoolmore

beautiful.A.haveplantedB.wereplantedC.planted()4.Thechildren____swimlastmonthandtheycanswimverywellnow.A.aretaughtB.

weretaughtC.weretaughtto()5.Itissaidthatpotatochips_____bymistakeaboutonehundredyearsago.A.wereinventedB.inv

entedC.areinventedCBCACGrammarexercise1.Youarelate,allthetickets__________(sell)outanhourago.2.Thistypeofcellph

one____________(make)inShenzhen.3.I_________________(notinvite)toyesterday’sparty.4.________thosemachines__

________(check)thismorning?5.Manytreesandflowers______________(plant)inourschoollastyear,andtheymadeourschoolabeau

tifulgarden.weresoldweremadewere/was+v.的过去分词wasn’tinvitedWerecheckedwereplanted1.PeopleuseradiostolearnEnglishinthepast._________________

____________________________2.Jackwillshowmethephoto.______________________________________________3.

TheyhaveraisedmuchmoneyfortheProjectHope.______________________________________________4.IoftenhearMarysingEnglishso

ngsathome._______________________________________________5.Wemustn’tthrowlitterabout.____________________________

____________________6.PeoplecanvisitplanetslikeMars._________________________________________________RadioswereusedtolearnEnglishi

nthepast.Thephotowillbeshowntome.MuchmoneyhasbeenraisedfortheProjectHope.MaryisoftenheardtosingEnglishsongsathome.Littermustn’tbethro

wnabout.PlanetslikeMarscanbevisited.ChangethefollowingsentencesintoPassiveVoice.()1.Hurryup,you____onthephone.A.WantedB.waswantedC.arewan

ted()2.Somestories_____thechildrenbytheteachereveryday.A.istoldforB.aretoldforC.aretoldto()3._____thathehasstudiedabroadforfiveye

ars.A.ItissaidB.ItsaysC.Thatissaid()4.Thewindow____fiveminutesago.A.iscleanedB.wascleanedC.canbecleaned()5.Thechildren______bytheteachersatschoo

l.A.takecareofB.aretakencareC.aretakencareofCCABCChoosethebestanswer.()6.Ihavenoideawhat______whileIwasasleep.A.happenedB.washappenedC.ha

ppens()7.Insomecountries,tea_____beforemeals.A.isservingB.isservedC.served()8.Thiskindofbooks______well.A.doesn’tse

llB.isn’tsellingC.aren’tsold.()9.I______tenminutestodecidewhichsentencewasrightbytheteacher.A.gaveB.wasgivenC.wasgiving()10.

Teachers______ineverypartoftheworld.A.areneedingB.areneededC.willneedABABBProject(1)ThisisKangkang’sinvention.Lookatthe

informationandthepicture.Whatdoyouthinkofit?Discusswithyourpartners.Name:Plar(plan-car)Inventor:KangkangYear:2014Use:B

othflyinganddriving2.Designyourowninvention.Drawapictureofitandwritedowntheinformationaboutit.Name:____________Inventor:___________Year:

_____________Use:______________Project（2）DescribingYourInvention3.Showthepictureofyourinventionanddescribeittotheclass.4.Discussingroupstodecidewh

ichisthemostuseful/interesting/funnyinvention.WeLearn:1.Somewords:mark,explorer2.Somephrases:findout,in…,direction,aslongas,wor

kwell,therestofthetime,beusedto,theshapeof3.Somesentences:Thismethodworkedwellatnightaslongastheweatherwasgoodandthestarscouldbeseen.Wec

an:1.Usethepassivevoiceofthesimplepasttensemoreproperly.2.TalkaboutnewtechnologyGPS.3.Developeourimaginationandcreativitybydesigningourowninventi

ons.•Read1a.•Memorizetheusefulexpressionsandkeysentencesthatwelearninthistopic.•FinishSectionDinyourworkbook.•PreviewSectionAofTopic2.