人教版高中英语必修三课件：unit 4 第一学时 reading and comprehension

英语·必修3(人教版)第一学时ReadingandComprehensionTask1快速阅读课文“Howlifebeganontheearth”，以约30词写出文章的段落大意。温馨提示：本文是科普文，属于说明文的范畴，写摘要时要抓住文章要说明的主要问题：地球上生命起源的几个主要阶段。语篇理解____________________________________________________________________________________________________________________________________________________________________________________________________________________语篇理解答案：Thepassageexplainshowlifebeganontheearth.Aftertheearthexplodedandproducedwaterwhosecontinuedpresencemadeitpossibleforlifetodevelop,plantsandanimalsincludinghumanbeingsappearedontheearth.Task2语篇理解根据课文“Howlifebeganontheearth”，选择正确答案。1．FromParagraph1wecanknowthatstarsarecreatedfrom________．A．air

B．atoms

C．rocks

D．iceB2．Whatdoestheword“they”refertointhesentences“Itexplodedloudlywithfireandrock.Theywereintimetoproducecarbon,nitrogen，watervapourand...”inParagraph2?A．Planets.B．Stars.C．Gases.D．Fireandrock.语篇理解D3．Whichistherightorderofthedevelopmentoflife?A．Smallcleveranimals—shellfish—dinosaurs—mammals.B．Shellfish—dinosaurs—smallcleveranimals—mammals.语篇理解CC．Shellfish—dinosaurs—mammals—smallcleveranimals.D．Dinosaurs—shellfish—mammals—smallcleveranimals.语篇理解4．Whyweremammalsdifferentfromotherlifeforms?A．Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.B．Theyproducedyounggenerallybylayingeggs.C．Theywereabletoliveonlandaswellasinthewater.D．Theyliveongrass.A语篇理解5．Whatproblemiscausedbyhumanbeings?A．Theyexisteverywhereontheearth.B．Theycauseglobalwarming.C．Theyfindnewmethodsofgrowingcrops.D．Theyenjoyhuntingandfishing.语篇理解BTask3语篇理解InsectsAmphibiansReptilesDinosaursMammalsincluding3．________WaterLandanimalshumanbeingsTask4根据课文“Howlifebeganontheearth”，在下文空格中填上恰当的词语，使文章连贯完整。Nooneknowsexactly1.________theearthbegan.Accordingtoawidelyacceptedtheory,theearthbeganwitha“BigBang”，2.________explodedloudlyandproducedwatervapourandmanygases，3.________(make)theearth'satmosphere.Astheearthcooleddown,waterappearedandstayed4.________thesurface.Itwasthehowwhichmaking语篇理解on

presenceofwater5.________allowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas,whichmade6.________possibleforlifetodevelop.First,theappearanceofsmallplantsencouragedthedevelopmentofearlyshellfishandallsortsoffish.Next,greenplantsbegantogrowonland.7.________werefollowedbylandanimals.Soreptilesappearedforthefirsttime.Later,dinosaursdeveloped.8.________，theysuddenlydisappeared.Afterthat,mammalscameintothatit语篇理解TheyHoweverbeing.Finally,humansappearedandspreadallovertheearth.However,theyareputtingtoomuchcarbondioxideintotheatmosphere,makingthe