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1、 Unit 4 Amazing ScienceTopic 2 When was it invented?Haveyouevergotlostsomewhere?Whatmethoddidyouusetofindyourdirection?（影片）（影片）Read and discuss the following questions.1. What would you do if you lose your way in a forest? 2. How did the early explorers know where they were?3. What is GPS? Is it use
2、ful to us?4. What do you think GPS will be used for in the future? What is GPS?GPS即全球定位系统(GlobalPositioningSystem)，简单地说，这是一个由覆盖全球的24颗卫星组成的卫星系统。这个系统可以保证在任意时刻，地球上任意一点都可以同时观测到4颗卫星，该观测点可以通过接收到的信号计算出经纬度和高度，以便实现导航、定位、授时等功能。这项技术可以用来引导飞机、船舶、车辆以及个人，安全、准确地沿着选定的路线，准时到达目的地。疑难讲解疑难讲解1.indirection按/朝方向e.g.Amotorbi
3、kehitatruckintheoppositedirection.2.workwell奏效；起作用e.g.Themedicineworkedwell.3.aslongas只要；长达e.g.Youcangoouttoplayaslongasyoufinishyourhomework.e.g.IhavetaughtEnglishaslongasnineyears.Read and answer the question. Athiefstoleabeautifulcellphonefromayounggirl.Heranawayveryquicklyandthenhidinasecretplac
4、e.Tohissurprise,whenhewasusingthecellphone,hewascaughtbythepolice.DoyouknowwhyBluetoothBluetoothisashortdistancewirelesscommunicationtechnology.Itprovidescoverage(覆盖）ofupto100meters.Itsalowpowertechnologythatcanbeusedtoconnectcellphonesorcomputerwithotherdevices.A bluetooth headset长长见识长长见识根据首字母提示，完成
5、短文。ThankstoGPS,wecanexactlyknoww_wearenow.GPSislikeaman-made“star”.Itcanbeu_inanyplaceandanyweatherconditiontofindoutourp_.Inthepast,theearlyexplorershadtousestarsinthes_totellthemwheretheywere,however,thismethoddidntworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere_ourpl
6、anets.hereositionsedkyxploreWhat have you learnt about in this topic? Can you say something about one of them?1.Rocket2.Cloning3.Robots4.GPS5.Othergreatinventions1.它是由什么制成的？Whatsitmadeof/from?2.我希望有一天我也能飞到太空。IwishIcouldgointospacesomeday.3.我希望你的梦想能实现。Ihopeyourdreamwillcometrue.4.众所周知，大多数生物体内都有DNA，包括
7、人。Asweknow,thereisDNAinmostlivingthings,includinghumanbeings.5.没有人确切地知道，但是大多数人认为机器人会成为我们生活的一部分。Nooneknowsforcertain,butmostpeoplethinkrobotswillbepartofourlives.6.总而言之，这个机器人对我们很有帮助。Inshort,thisrobotisveryusefultous.看谁能根据中文意思快速翻译六个句子。看谁能根据中文意思快速翻译六个句子。2aGrammar focusPassive voice ()The radio was inve
8、nted by Guglielmo Marconi in 1895.When was it developed ?Where was it developed ?Where were laptops invented ?Around 1998.It was developed in Korea.They were invented in Japan.（录音）（录音）2bUseful expressionsWhats it made of/from? Its made of/from .I wish I could go into space some day.I hope your dream
9、 will come true.There is DNA in most living things, including human beings.No one knows for certain, but most people think that robots will be part of our lives.（录音）（录音）Passive voice 被动语态被动语态 was /were +done考点探究考点探究()1.Abigsupermarket_inourcitylastyear.A.isbuiltB.werebuiltC.wasbuilt()2.Couldyoutellm
10、ewhotheradio_by?A.inventsB.inventedC.wasinvented()3.Manytreesandflowers_inourschoollastyear.Theymadeourschoolmorebeautiful.A.haveplantedB.wereplantedC.planted()4.Thechildren_swimlastmonthandtheycanswimverywellnow.A.aretaughtB.weretaughtC.weretaughtto()5.Itissaidthatpotatochips_bymistakeaboutonehundr
11、edyearsago.A.wereinventedB.inventedC.areinventedCBCACGrammar focus被动语态综合练习一、用所给词的适当形式填空。1.Youarelate,allthetickets_(sell)outanhourago.2.Thistypeofcellphone_(make)inShenzhen.3.Thestory_(happen)inamagicland.4.Herhomework_(finish)yet,sosheisstillworkingonitnow.5.When_thesportsmeeting_(hold)?6.Look,anew
12、road_(build)inthatarea.7.Thedirtyclothesmust_(wash)atonce.8.Theroses_(smell)sweet.9.Itiswell_(know)thattheGreatWallisthesymbolofChina. were soldwere madehappenedhasnt been finishedwill be heldis being builtbe washedsmellknownbe的某一时态形式的某一时态形式+v.的过去分词的过去分词二，将下列句子改为被动语态。1.PeopleuseradiostolearnEnglishi
13、nthepast._2.Jackwillshowmethephoto._3.TheyhaveraisedmuchmoneyfortheProjectHope._4.IoftenhearMarysingEnglishsongsathome._5.Wemustntthrowlitterabout._6.Apolicemanisrunningafterathiefinthestreet._7.PeoplecanvisitplanetslikeMars._Radios were used to learn English in the past.The photo will be shown to m
14、e. /I will be shown the photo by Jack.Much money has been raised for the Project Hope.Mary is often heard to sing English songs at home.Litter mustnt be thrown about.A thief is being ran after in the street.Planets like Mars can be visited.三，单项选择。()1.Hurryup,you_onthephone.A.WantedB.waswantedC.arewa
15、nted( )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.aretakencar
16、eof C CABC()6.Ihavenoideawhat_whileIwasasleep.A.happenedB.washappenedC.happens()7.Insomecountries,tea_beforemeals.A.isservingB.isservedC.served()8.Thiskindofbooks_well.A.doesntsellB.isntsellingC.arentsold.()9.I_tenminutestodecidewhichsentencewasrightbytheteacher.A.gaveB.wasgivenC.wasgiving()10.Teach
17、ers_ineverypartoftheworld.A.areneedingB.areneededC.willneedABABB一、词汇：A,根据所给英汉提示写出单词。1.Whatarethese_(牙刷）madeof?2.AteamfromUKwerethefirstto_(克隆）ananimalsuccessfully.3.ThelightbulbisoneofEdisons_(发明).4.Wouldrobotsliketobehumanbeings_(佣人)iftheycanthinkforthemselves?5.Wewillgo_(只要）theweatherisgood.toothb
18、rushescloneinventionsservantsas long as B，根据首字母提示补全单词。6.ClassThreearedoinge_inthelab.7.O_scientistsfindlifeonMars,wewillhaveanewlivinghomeland.8.Hew_usnottogooutafteritwasdark,fortheroadcoveredwithsnowwasdangerous.9.Weshouldmakeac_toprotectingthewildanimals.10.Afterschool,studentsshouldhelptheirpare
19、ntsdosomeh_.xperimentsncearnedontributionousework二、根据汉语提示完成句子。1.Itisbadforyourhealthtoeat_(太多).2.Ourcountryhas_ChangeI_(发射)spacesuccessfully.3._(据说）thatJesusChristwasborninabarn.4._（到目前为止)，wehavefinishedalotofjobs.5.Jimspen_(相似)mine.6.Weshouldhavethegoodhabitof_(独立思考).7._(总而言之),heisagreatastronaut.8
20、.Ibelieveourhopewill_(变成现实).too muchsent intoIt is saidSo far is similar to thinking for ourselvesIn shortcome true三、情景对话，选择正确的应答语。A:Hi,Juanjuan,Whatareyoudoing?B:IamwatchingTV.A:_B:Sorry,Idontknow._A:Thatsbecauseofman-madesatellites.B:_A:Theycansendandreceivemessages.Withtheirhelp,ChinacansenditsTV
21、andradioprogramstotheothersideoftheworld._wecanalsousesatellitestohelpmaketelephonecallstoforeigncountries.B:_Wemuststudyhardtomasterthetechnology.a.ForeigncountriescansendtheirprogramstoChina.b.Cantheysendandreceivemessages?c.Howusefultheyare!d.Why?e.DoyouknowwhywecanwatchTVprogramsfromforeigncount
22、ries?f.Whatcantheydo?edfac四、用所给词的适当形式填空。help one develop common likeLookatthis,itlooks_apen,butitsnota_pen.Itsatalkingpen.Itsusedfor_usimproveourspokenEnglish.Itwas_bytheBeijingRenaiEducationInstitutein2007.Wouldyouliketobuy_?likecommonhelpingdevelopedoneWritten workLook at Kangkangs invention and the information.Discuss in groups and design your own invention.Then draw a picture of it.NamePlar (plane-car)Inventor KangkangYear2009UseBoth flying and drivingYour own inventionNameInventorYearUseInformationpicture
