How life began on the earth地球生命起源

ReadingHowlifebeganontheearthReading4.5-3.8billionyearsagomanymillionsofyearslater250millionyearsago65millionyearsagoSolongagoHowLifeBeganontheEarthPredictthemainideaandstructurefromthetitleandpicture（瀏覽標(biāo)題和圖片，預(yù)測大意和結(jié)構(gòu)）1.Whatisthepassagemainlyabout?A.ThebirthoftheearthB.Whydinosaursdiedout.C.Theappearanceanddevelopmentoflifeontheearth.D.Thefactthathumanbeingscausedglobalwarming.2.Howisthepassagedevelopedaccordingtothepictureonpage26?A.inspaceorderB.intimeorderC.bygivingexamplesD.bycomparingPredictthemainideaandstructurefromthetitleandpicture（瀏覽標(biāo)題和圖片，預(yù)測大意和結(jié)構(gòu)）1.Whatisthepassagemainlyabout?A.ThebirthoftheearthB.Whydinosaursdiedout.C.Theappearanceanddevelopmentoflifeontheearth.D.Thefactthathumanbeingscausedglobalwarming.2.Howisthepassagedevelopedaccordingtothepictureonpage26?A.inspaceorderB.intimeorderC.bygivingexamplesD.bycomparing√Paragraph1:Paragraph4:Paragraph5:(D)Theoriginoftheuniverse(E)Theformationoftheearth(A)Theimportanceofwaterforlife(B)Thedevelopmentofplantsandanimalsontheearth(C)ThearrivalofhumansandtheirinflunceontheearthParagraph2:Paragraph3:Task1:Readthetext

quicklyandfindoutthemainideaforeachparagraph.Checkyouranswersingroups.

Fast-reading（快讀文本，獲取大意）1073849615212111.

Insectsandamphibiansappeared.3.

Theearthbecamea

solidball.5.

Reptilesappeared.7.

Theearthwasacloudofdust.9.

Shellfishandotherfishappeared.11.

Cleveranimalswithhandsandfeetappeared.2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth.10.Theuniversebeganwitha"BigBang".12.Mammalsappeared.2.

Puttheorderofdevelopment

oflifeintoatimelineaccordingtothereadingpassage.Task1:Guessthemeaningaccordingtothecontext.(根據(jù)上下文猜測詞義）①.Whatdoestheunderlinedword“it”inparagraph3referto?WaterhadalsoappearedonotherplanetslikeMarsbutunliketheearth,ithaddisappearedlater.②.Whichsentenceinparagraph4istheclosestinmeaningtothefollowingone?Itisstillunknownwhythedinosaursdisappearedsuddenly.③.Whatdoestheunderlinedword“amphibians”inparagraph4referto?Theywerefollowedbylandanimals.Somewereinsects.Others,calledamphibians,wereabletoliveonlandaswellasinthewater.A.陸生動物B。水生動物C.水陸兩棲動物waterWhytheysuddenlydisappearedstillremainedamystery.Carefulreadingformoredetails(細(xì)讀文本，尋找細(xì)節(jié)）

Task2:Readparagraph2-5,andanswer:(1)Whathappenedontheearthafterthe“BigBang”?(2)Howdidwatercomeintobeing(形成）

ontheearth?(3)whatwastheimportanceofwater?④Isitwrongtoshowfilmswithdinosaursandpeopletogether?Why?⑤Whatproblemhasbeencausedbyhumans？

Carefulreadingformoredetails(細(xì)讀文本，尋找細(xì)節(jié)）

acloudofdustasolidglobe

(1)Whathappenedontheearthafterthe“BigBang”?(2)Howdidwatercomeintobeing(形成）

ontheearth?Theearthcooleddown,waterbegantoappearonitssurface.⑶

whatwastheimportanceofwater?⑷Isitwrongtoshowfilmswithdinosaursandpeopletogether?Why?CarefulReadingformoredetails(細(xì)讀文本，尋找細(xì)節(jié)）Itmadeitpossibleforlifetodevelop.Yes.Because65millionsofyearsagotheageofdinosaursended,butabout2.6millionyearsagothehumanbeingsappeared.

Theyareputtingtoomuchcarbondioxideintotheatmosphere，whichpreventheatfromescapingfromtheearthintospace.Theearthmaybecometoohottoliveon.⑸Whatproblemhasbeencausedbyhumans？Theearthisbecominghotterandhotter!1Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearontheearth.2

Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.

3.

Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsago

that與what的區(qū)別。that在從句中不能夠充當(dāng)句子成分，也沒有含義；what可以在從句中作主語、表語、賓語或定語，意思是”什么，……的事情”

Importantsentences重點句式練一練，看一看你有多棒?。?011·北京）

BarbaraJonesofferstoherfansishonestyandhappiness.A.WhichB.WhatC.ThatD.Whom.(07全國Ⅱ) _mattersmostinlearningEnglishisenoughpractice.A.What B.Why C.Where D.Which〖06遼寧〗

makesthisshopdifferentisthatitoffersmorepersonalservices.A.What B.Who C.Whatever D.Whoever〖02上海〗_______fashiondiffersfromcountrytocountrymayreflecttheculturaldifferencesfromoneaspect.A.What

B.That

C.This

D.Which拯救地球（田震、零點樂隊）.flvAsastudent,Whatdoyouthinkweshoulddotoprotecttheearthandmakeitabetterplacetoliveon.

Usefulexpressions：Inmyopinion……Personally……Ithink……AsfarasI’mconcerned,…..Don’t……Weshould/shouldn’t……Discussingroups(小組討論）Savepaper:Giveawayyourbookstootherstoreuse.Usebothsidesofyourpaper.UseclothtowelsinsteadofpapertowelsornapkinsSaveelectricitybyturningoffthelightwheneverwearethelasttoleavetheclassroom

Saveeverydropofwater.Weshouldn’tleavewaterrunningwhilewebrushteeth.Gotoschoolbybikeoronfootinsteadofbycar.Takeanaturalgreenbagorbasketinsteadofaverythinplasticbagwhenyougoshopping.Plantmoretreesandgrowmoregrasscon