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Unit4AmazingScienceTopic1Whenwasitinvented?SectionD•What’situsedfor?•It’susedforlisteningtomusic.•What’sitmadeof?•It’smadeofplastic.•Where

wasitinvented?•ItwasinventedinKorea.•Whenwasitinvented?•Itwasinventedin1998.•What’situsedfor?•It’susedforcommunicatingeasily.•What’sitmadeof

?•It’smadeofplasticandmetal.•Wherewasitinvented?•ItwasinventedinAmerica.•Whenwasitinvented?•Itwasinvente

din1973.Whatmethoddidyouusetofindyourlostcellphone?•GPSislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweat

hertofindoutourposition.Theearlyexplorersusedthestarsaslandmarkstoknowwheretheywereandinwhichdirectiontheyweregoing.Thismethodworkedwellatnightaslon

gastheweatherwasgood.Butitdidn’tworksowellduringtherestofthetime.Let’susetheGPS.n.探险者，勘探者•1.Howdidtheearlye

xplorersknowwheretheywere?•Theyfoundoutwheretheywerebyusingstars.•2.What’sthedisadvantageofusingthestarsasguidingmarks?•Itsdisadvantageisthatitdi

dn’tworkwellwhentheweatherwasbadandthestarscouldnotbeseen.•3.WhatisaGPS?Isitusefultouse?•Itislikeaman-madestar.Wecanuseitatany

time,inanyplaceandinanyweathertofindoutourposition.Itisveryuseful.•4.WhatdoyouthinktheGPSwillbeusedforinthefuture?•…Readthepassagean

ddiscussthequestionsonPage88.Keywords•explore•explorer,mark•findout,in…direction•workwell,aslongas•therestofthetime•so

lve,like,use,theshapeof•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,wecanexact

lyknoww_____wearenow.GPSislikeaman-made“star”.Itcanbeu____inanyplaceandanyweatherconditiontofindoutourp________.Inth

epast,theearlyexplorershadtousestarsinthes____totellthemwheretheywere,however,thismethoddidn’tworkwellwhentheweatherwasbad.SoGPSisagreatinventiontha

tcanhelphumanstobettere________ourplanets.hereositionsedkyxploreGrammarPassiveVoice(Ⅱ)TheradiowasinventedbyGuglielmoMarconiin1895.W

henwasthedigitalcameradeveloped?Wherewasitdeveloped?Whatisarocketusedfor?Itwasdevelopedinthe1970s.ItwasdevelopedinJapan.Itisusedforsendi

ngsatellitesorspaceshipsintospace.FunctionsIwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.It’ssaidthatheinventedmorethantwothousandth

ingsduringhislife.Inventingisinterestingandexcitingandeveryonecanbeaninventor.Passivevoicewas/were+done()1.Abigsupermarket_____i

nourcitylastyear.A.isbuiltB.werebuiltC.wasbuilt()2.Couldyoutellmewhotheradio____by?A.inventsB.inventedC.wasinvented()3.Many

treesandflowers_____inourschoollastyear.Theymadeourschoolmorebeautiful.A.haveplantedB.wereplantedC.planted()4.Thechil

dren____swimlastmonthandtheycanswimverywellnow.A.aretaughtB.weretaughtC.weretaughtto()5.Itissaidthatpotatochips_

____bymistakeaboutonehundredyearsago.A.wereinventedB.inventedC.areinventedCBCACGrammarexercise1.Youarelate,allthetickets__________(sell)outanhou

rago.2.Thistypeofcellphone____________(make)inShenzhen.3.I_________________(notinvite)toyesterday’sparty

.4.________thosemachines__________(check)thismorning?5.Manytreesandflowers______________(plant)inourschoollastyear,and

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

_____________________________________________2.Jackwillshowmethephoto.______________________________________________3.Theyh

averaisedmuchmoneyfortheProjectHope.______________________________________________4.IoftenhearMarysingEnglishsongsathome._

______________________________________________5.Wemustn’tthrowlitterabout.________________________________________________6.Peoplecanvisi

tplanetslikeMars._________________________________________________RadioswereusedtolearnEnglishinthepast.The

photowillbeshowntome.MuchmoneyhasbeenraisedfortheProjectHope.MaryisoftenheardtosingEnglishsongsathome.Littermustn’tbethrownabout.Planetsli

keMarscanbevisited.ChangethefollowingsentencesintoPassiveVoice.()1.Hurryup,you____onthephone.A.WantedB.waswantedC.arewanted()2.Somestories

_____thechildrenbytheteachereveryday.A.istoldforB.aretoldforC.aretoldto()3._____thathehasstudiedabroadforfiveyears.A.ItissaidB.ItsaysC.That

issaid()4.Thewindow____fiveminutesago.A.iscleanedB.wascleanedC.canbecleaned()5.Thechildren______bytheteachersatschool.A.

takecareofB.aretakencareC.aretakencareofCCABCChoosethebestanswer.()6.Ihavenoideawhat______whileIwasasleep.A.happenedB.washappen

edC.happens()7.Insomecountries,tea_____beforemeals.A.isservingB.isservedC.served()8.Thiskindofbooks______well.

A.doesn’tsellB.isn’tsellingC.aren’tsold.()9.I______tenminutestodecidewhichsentencewasrightbytheteacher.A.gaveB.wasg

ivenC.wasgiving()10.Teachers______ineverypartoftheworld.A.areneedingB.areneededC.willneedABABBProject(1)ThisisKangkang’sinvention.Lookatthein

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

riving2.Designyourowninvention.Drawapictureofitandwritedowntheinformationaboutit.Name:____________Inventor:___________Year:__________

___Use:______________Project（2）DescribingYourInvention3.Showthepictureofyourinventionanddescribeittot

heclass.4.Discussingroupstodecidewhichisthemostuseful/interesting/funnyinvention.WeLearn:1.Somewords:mark,explorer2.Somep

hrases:findout,in…,direction,aslongas,workwell,therestofthetime,beusedto,theshapeof3.Somesentences:Thismethodworkedwellatnightaslongas

theweatherwasgoodandthestarscouldbeseen.Wecan:1.Usethepassivevoiceofthesimplepasttensemoreproperly.2.Talkaboutnewtechnolog

yGPS.3.Developeourimaginationandcreativitybydesigningourowninventions.•Read1a.•Memorizetheusefulexpressionsa

ndkeysentencesthatwelearninthistopic.•FinishSectionDinyourworkbook.•PreviewSectionAofTopic2.