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1、Unit4ExploringplantsWarmingupCanyoutellthenameoftheflower?TulipTulipsarebeautifulflowersandpeopleoftenSendthemtotheirfriendsaspresents.SunflowerItcomesfromNorthAmerica.Indianstherebegantogrowthemsome3000yearsago.PeonytheChinesenationalflowerRoseRosesarebestpresentstobesenttofriends.An
2、ditisalsoverypopulartosendrosesaslovesignalbetweenyoungpeople.Redrosesindicatewarmthandloveandwhiteones,purityandsimplicity,blueones,honestyandsincerity.Whichisyourfavoriteflower?Why?Reading:rose玫瑰tulip郁金香peony牡丹sunflower向日葵Whichflowerisyourfavorite?Why?roseredrosesindicatewarmthandlo
3、vewhiteones,purity（纯洁）andsimplicity（朴实）blueones,honestyandsincerity.JosephBanksDanielsolanderKarlLinnaeusTeacherStudentlifelongfriendsWhathappenedintheseyears?Completethesentences.1Inl5OOBC,theQueenofEgyptsentshipstogatherplants,animalsandothergoods.2Inthe1740s,aFrenchCatholicmissiona
4、rycalledFatherd'IncarvillewassenttoBeijing.3In1751,someTreeofHeavenseedsarrivedinEngland.Comprehending4In1769,SirJosephBankscollectedvastquantitiesofplantsinthelandnowknownasAustralia5In1784,theTreeofHeavenwasintroducedintoNorthAmerica.6In1833,NathanielWardusedtwospecialcasesthathehad
5、inventedtoshipBritishplantstoSydney,Australia.7Between1843and1859,aBritishplantcollectorRobertFortune.madeseveraltripstoChina8Duringthesecondhalfofthenineteenthcentury,manyCatholicmissionariesweresenttoChinafromFrance.9In1897,aFrenchPlantcollectorFatherFarges.sentseedsoftheDoverTreefr
6、omChinatoFrance.10In1899,aPlantcollector,EHWilson.collectedalargequantityoftheseedsoftheDoveTreeinChina.Grammar1.Collecting“exotic”plants,astheyarecalled,datesbacktotheearliesttimes.(ReadingPara.1)【解析】datebackto从现在追溯到过去某时，相当于datefrom或gobackto。【考查方向】考查datebackto短语作谓语的情况。因“追溯”是从现在算起指向过去
7、，所以改动词的时态通常用一般现在时，没有被动语态。【考题预测】Hisinterestinstampcollectinghisschooldays.A.isdatedfromB.datesbacktoC.isdatedbacktoD.dates【点拨】datebackto(datefrom)无被动形式，而date作动词表示“写上日期”，与句意不符，故选B。2.Braveyoungmentooktheopportunityofgoingonbotanicalexpeditions,oftenfacingmanydangersincludingdisease,near-
8、starv
