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1、我爱七选五福清华侨中学刘云平阅读”七选五”Whatdoyouthinkofit?YourstepsormethodsToimproveitalot?!Nooneknowsexactlyhowtheearthbegan.Accordingtoawidelyacceptedtheory,theearthbeganwitha“BigBang”.………………………………………………………………………………………………………………………………………………………………………………However,theyareputti
2、ngtoomuchcarbondioxideintotheatmosphere,makingtheearthtoohottoliveon.Sowhetherlifewillcontinueontheearthwilldependonwhetherthisproblemcanbesolved.HOWLIFEBEGANONTHEEARTH1.First,theappearanceofsmallplantsencouragedthedevelopmentofearlyshellfishandallsortsoff
3、ish.2.Afterthat,mammalscameintobeing.Finally,humansappearedandspreadallovertheearth.3.Itexplodedloudlyandproducedwatervaporandmanygases,makingtheearth’satmosphere.4.Itwasthepresenceofwaterthatallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandsea
4、s,whichmadeitpossibleforlifetodevelop.5.Astheearthcooleddown,waterappearedandstayedonthesurface.6.Next,greenplantsbegantogrowonland,andtheywerefollowedbylandanimals.Soreptilesappearedforthefirsttime.7.Later,dinosaursdeveloped.However,theysuddenlydisappeare
5、d.Workinpairs:Rearrangetheordersofthesentencestoformapassage“Howlifebeganontheearth”3.Itexplodedloudlyandproducedwatervaporandmanygases,makingtheearth’satmosphere.5.Astheearthcooleddown,waterappearedandstayedonthesurface.4.Itwasthepresenceofwaterthatallowe
6、dtheearthtodissolveharmfulgasesandacidsintotheoceansandseas,whichmadeitpossibleforlifetodevelop.1.First,theappearanceofsmallplantsencouragedthedevelopmentofearlyshellfishandallsortsoffish.6.Next,greenplantsbegantogrowonland,andtheywerefollowedbylandanimals
7、.Soreptilesappearedforthefirsttime.7.Later,dinosaursdeveloped.However,theysuddenlydisappeared.2.Afterthat,mammalscameintobeing.Finally,humansappearedandspreadallovertheearth.However,theyareputtingtoomuch………..Nooneknowsexactlyhowtheearthbegan.Accordingtoawi
8、delyacceptedtheory,theearthbeganwitha“BigBang”.3.Itexplodedloudlyandproducedwatervaporandmanygases,makingtheearth’satmosphere.5.Astheearthcooleddown,waterappearedandstayedonthesurface.4.Itwasthepresenceofwate
