高一英语必修三Unit 4

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1、必修三Unit4Astronomy:thescienceofthestarsⅠ.语法短文填空(1)Astheresultof“BigBang”,theviolentearthslowlysettledintoaglobe1(move)aroundthesun.Thegasseswhichweretomaketheearth's2（大气层）cameintobeingfromtheexplosionofthedustball,withwater3(follow)themwhiletheearthcooleddown.Itallowedthebeginningforlife.Manymill

2、ionsofyears4,thefirst5(extreme)smallplantsbegantoappear6thesurfaceofthewater,7(multiply)andfillingtheseaandoceans,whichencouragedthelaterdevelopmentofearlyshellfishandallsortsoffish.Astimepassed,greenplantstakingcarbondioxideandproducing8（氧气）cametolandandgrewintoforest.Laterthechainsoflivesconti

3、nued,suchasinsects,amphibians,reptiles,dinosaursandmammals,thetypicalof9ishumanbeing.Theydon'tonlydo10totheearthbutcausedamagetoit.答案：1.moving2.atmosphere3.following4.later5.extremely6.on7.multiplying8.oxygen9.which10.good(2)Theearthwasjustacloudof　1　(energy)dustafterthe“BigBang”,thenthedustbe

4、gantocombineintoaballmovingaroundthesun.Theearth　2　(explode)loudlywithfireandrock,tobeintimetoproducemanythings,　3　maketheearth’satmosphere,waterstayedontheearthandpeoplethinkitisimportantforthebeginningoflife.Itallowedtheearthtodissolve　4　(harm)gases.Thenlifebegantodevelop.Nobodyunderstoo

5、dplantswerethestartofchanges.They　5　(multiply)andfilledthefirstoceanandseaswithoxygen.Thisencouragedthe　6　(develop)ofearlyshellfishandfish.Landanimalssuchasinsects,reptilesanddinosaursandsoonappearedafterthefirstgreenplantsappeared.Smallcleveranimals　7　(spread)allovertheearth.Theydeveloped

6、new　8　(method)ofgrowing,huntingandmoving.Toomuchcarbondioxidewasputintotheatmosphere,which　9　(prevent)heatfromtheearthintospace.Whetherlifecontinues　10　(取决于)whetherthisproblemcanbesolved.答案：1.energetic　2.exploded　3.which　4.harmful　5.multiplied　6.development7.spread8.methods　9.prevents　1

7、0.dependsonⅡ.知识点重点单词1.spreadvt.&vi.展开,铺开;散布;扩大;延伸Thebirdspreaditswings.那只鸟展开了翅膀。Fliesspreaddisease.苍蝇传播疾病。常用结构:spreadsth.withsth.用……抹/涂/铺……spread...on...把……抹/涂/铺在……bespreadfor摆好（桌子）准备spreadoneself[口]舒展四肢(躺下)spreadout张开，伸开，