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1、Unit3SM2. provide.with为供应4. throw away 扔掉6. a lot Of 很多.8. Stoptodo停止（手上做的接着去）做某事10. in the future 将来12. lift up 上升14. of course 当然16. one quarter 四分之一18. take a photo 照相20. take a look 看一眼22. find out发觉，查明24. in the end 最终有有（对某人来说）做某事很词组1.becoveredby被覆盖3.put.into.把倒入5.onEarth在地球上7.stopdoing停止正在做的事情
2、9.savewater节约用水11.inthesky在空中13.makeenergy获得能量15.forexample例如17.threequarters四分之三19.inthesea在海洋中efrom来自23. differenttypesof不同类型的句型1. Thereis+单数可数名词/不行数名词2. Thereare+可数名词复数3. Itis+adj.+（forsb.）todosth.语法可数名词和不行数名词一、可数名词1 .定义：可数名词有单数和复数两种形式。指一个人或一件事物时，用单数形式；指两个或多个人或事物时用复数形式。2 .名词由单数形式变成复数形式的规则如下：1）一般的
3、名词词尾干脆加-So如：bookbooksroomrooms2）以s,ss,ch,sh,x结尾的名词，在词尾加-es。如：busbusesglassglasseswatchwatchesdishdishesboxboxes3）以辅音字母+y”结尾的名词，要先将y改为i再加es。如：citycitiesbodybodies4）以f或fe结尾的名词，要将f或fe改为V再加-es。如:halfhalves5）特例knifekniveschildchildrenmanmenwomanwomenpolicemanpolicemen（规律：manmen）tomatotomatoespotatopotato
4、esfootfeettoothteethsheep,ChineSe,Jiipanese.deer单、复数同形people单数形式表示复数意义，要求谓语动词用复数；people的复数形式peoples通常指“多个民族二、不行数名词1 .不行数名词没有复数，当它作句子的主语时，谓语动词要用单数形式。如：Thefoodisveryfresh.食品很簇新。2 .有的不行数名词也可以作可数名词，有复数形式，但他们的意义往往发生变更。如：water（/K）waters（水域）orange（橘汁）oranges（橘子）Unit3TheEarth检测题一、单项选择1. Bennysawthreeclimbin
5、gthewalls.A.chiefsB.thief2.Tom,whatarethose?C.thievesD.thieve-Theyare.A.deersB.adeerC.deerD.deeres3.Thereabookandtwopensonthedesk.A.isB.areC.beD./4.Theboyisthirsty,andhewouldlikeA.acupofteaC.aboxofchocolateB.abowlofriceD.apieceofbread5.Mathsmyfavouritesubject.A.isB.amC.areD.be二、阅读理解Imaginethesituati
6、on.Youaredrivingaloneinadesertoronamountain.Youhavenoideawhereyouare.Youpassedthelasthousetwohoursago.Thenyourcarbreaksdown.Itisnightanditiscold.Youhavenomobilephone.Whatdoyoudo?Well,nexttimetakeaGPSwithyou.Thisinventionmaybeabletohelpyou.Itisadevice（装置）whichusessatellites（卫星）tofindtheusersposition（
7、位置）.Itcanfindyourpositiontowithin20metres.AGPScannotstartyourcar,butatleastyouwillknowwhereyouare.GPS,whichmeansGlobalPositioningSystem,isasmallradioreceiver.Itlookslikeamobilephone.Youcanholditinyourhand,orputinyourpocket.Itissometimesputintoawatchoratelephone.WealsofindGPSdevicesincars,planes,orbo
8、ats.Someofthesedeviceshaveelectronicmaps,soyouknowwhereyouare.Forexample,inacitytheycantellyouthenameofthestreet.TherearethreepartstotheGlobalPositioningSystem.Thefirstpartisthereceiver.Youcanholditinyourhand,orhaveitfixedintoyourcar,plane,etc.ThesecondpariisagroupofsatellitesorbitingtheEarth.Therec
9、eivercontactsatleastfourofthesatellitesandcalculates（i算）itsposition.Thethirdpartofthesystemisanetworkofgroundstations.Theyareallovertheworld.Theycontrolthesatellitesandmakesuretheyareworkingwell.SomepeoplethinkthatinthefuturetheGPSwillbeascommonasthemobile.Theyarebecomingcheaperandmoreandmoreaccurat
10、e（精确的）.TherearealsonewusesfortheGPS.Perhapstheywillbecomelikewatches.Everyonewillhaveoneandyouwillneverbelostagain.6.Accordingtothepassage,withthehelpoftheGPS,people.A. can,tbelostinanewcityB. can,tfindtheirwayindiflerentcountriesC. canlearnaboutthecultureofanunknownplaceD. canspendtheleasttimegetti
11、ngtoanotherplace7. WecanIeamfromthepassagethat.A. therearethreepartstotheGPSB. aGPScantbeputintoawatchC. aGPScanhelpyoustartyourcarD. theGPSarebecomingmoreandmoreexpensive8. TheunderlinedwordTheyinparagraph3means”.A.ReceiversB.GPSdevicesC. SatellitesD. Ground stations9. Thepassageismainlyabout.A. th
12、ehistoryoftheGPSB. theintroductionoftheGPSC. theshapeoftheGPSD. thethreepartsoftheGPS10. Whatcanweinfer（推断）fromthepassage?A. AllGPSdeviceshaveelectronicmaps.B. PeopleinmanycountrieswillusetheGPSforfree.C. ThereceiveroftheGPScontactsatleastfiveofthesatellites.D. TheGPSwillbecomemoreandmorecommonineve
13、rydaylife.三、依据句意及首字母提示完成单词11. Theywentforwalkstogetherinthef.11.1 wantaIbox;thisoneistoosmall.13. ItisimportantforustoptheEarthforourfuture.14. Plantsabsorb（吸取）efromthesun.15. Weshouldntpourenvironment.四、完形填空Ifasnakebitesyou,takeaphotowithyourmobilephone!Itmaysaveyourlife.Thisisthesurprising16 ofaBr
14、itishcook.OnedayHenryJacksonwasworkinginarestaurantkitchen.Hepickedupadishfromthetable,and17 asnakeappeared.andbithimonthehand.Afewdaysearlier,thesnakecametothe18fromAsiainaboxofbananas.Itclimbedoutoftheboxand19underthedish.“Iwenttotrytopickitupanditbitmeagain.Ithrewit20thekitchen,anditlandedinthefr
15、idge.SoIclosedthedoor,Mr.Jacksonsaid.Anyway,Mr.Jacksonstayed21andhetookaphotoofthesnakewithhismobilephone.Soonhis22begantoacheandhewenttohospital.Thenhischestbegantohurt.Doctorscouldn,tsaywhatwaswrong23theydidn,tknowwhatkindofsnakeitwas.ThenMr.Jacksonrememberedhismobilephonephoto.Thedoctors24ittoLondonZoo.Whentheyknewthekindofsnake,theycouldgiveMr.Jacksontherightmedicine,andhelefthospitalthenextday.“Somyadviceisthis：Ifasnakebitesyou,p
