1、Unit 4Astronomy:the science of the starsRetell the story.TimeWhat happenedBig Bang_ began to form and combine to create stars and other bodies.AtomsBetween 4.5 and 3.8 billion years agoDust settled into a solid and _ globe.The earth exploded to produce its_.The continued _ of water allowed the earth
2、 to dissolve harmful gases and _ into the oceans and seas.violentatmospherepresenceacidsMany millions of years laterThe first small plants on the surface of the water produced_.Early _ and all sorts of fish appeared.Green plants began to grow on land.Insects and_ appeared.oxygenshellfishamphibiansMa
3、ny millions of years later_ appeared and they laid eggs.Dinosaurs developed,laid eggs and _ for more than 140 million years.Mammals rose and _ babies.Reptilesexistedgave birth toAbout 2.6 million years agoSome small _ animals with hands and feet appeared and spread all over the earth.NowHumans produ
4、ce too much carbon _,making the earth too hot.cleverdioxideBetween 4.5 and 3.8 billion years agoDust settled into a solid and _ globe.The earth exploded to produce its_.The continued _ of water allowed the earth to dissolve harmful gases and _ into the oceans and seas.violentatmospherepresenceacids1
5、.violent(adj.)猛烈的；激烈的；猛烈的进攻极其的厌恶极度痛苦(adv.)猛烈地；激烈地；(n.)猛烈；激烈；暴力；船在海上强烈的风暴中沉没。The boat sank in a _ _ at sea.violent stormviolentlya violent attackviolent dislikeviolent painviolenceBetween 4.5 and 3.8 billion years agoDust settled into a solid and _ globe.The earth exploded to produce its_.The continu
6、ed _ of water allowed the earth to dissolve harmful gases and _ into the oceans and seas.violentatmospherepresenceacidsThey were in time to produce carbon,nitrogen,water vapour1)sooner or later;eventually 迟早；最后，总有一天Ill see him in time.总有一天我会遇见他。2)not late 及时；不迟She will be back in time to prepare din
7、ner.她来得及回来准备晚饭。与time相关的短语 按时，准时有时，偶尔立即，立刻 在任何时候曾经，一度on timeat timesin no timeat any timeat one time in timeon timein no timeat one timeat timesat any time1.-Why are you in a hurry to leave here?-Get home _ to bathe the kid.2.These buses are never _ and the passengers are always complaining.3.I am aw
8、ay,please call me _ if someone come to see me.in timeon timeat any time4.You cant imagine this lake used to be a beautiful place in our province _.5.He rushed out of the kitchen _ when he heard the shout.6._ I sit silently and wonder if this kind of job is worth all the effort.at one timein no timeA
9、t timesBetween 4.5 and 3.8 billion years agoDust settled into a solid and _ globe.The earth exploded to produce its_.The continued _ of water allowed the earth to dissolve gases and _ into the oceans and seas.violentatmospherepresenceacidsharmfulharmful(adj.)有害的harmless反义词harm(n.&v.)be harmful to=do
10、 harm to对有害=harm(v.)sb.(n.)1)Smoking _ your health.is harmful to2)那个老人从未伤害过任何人。The old has never harmed anybody.无害的Many millions of years laterThe first small plants on the surface of the water produced_.Early _ and all sorts of fish appeared.Green plants began to grow on land.Insects and_ appeared.
11、oxygenshellfishamphibiansThey multiplied and filled the oceans and seas with oxygen,which encouraged the later developmentmultiply(v.)繁殖；增加；做乘法 multiply 8 by 4 84 Efficiency would be multiplied several times.效率提高好几倍。encourage encouragementdiscourage(v.)(n.)discouraged 气馁的discouraging 令人气馁的1.My succe
12、ss encouraged me to continue.2.High prices for corn and wheat will encourage farming.n.encourage sb.to do sth.Many millions of years later_ appeared and theyDinosaurs developed,laid eggs and _ for more than 140 million years.Mammals rose and _ babies.Reptilesexistedgave birth tolaid eggs.The naughty
13、 boy _ to me thatthe hen that _ there just now had_ two eggs the day before.A.laid;laid;laid B.B.laid;lay;lainC.lied;laid;lain D.lied;lay;laidDMany millions of years later_ appeared and theyDinosaurs developed,laid eggs and _ for more than 140 million years.Mammals rose and _ babies.Reptilesexistedg
14、ave birth tolaid eggs.give birth to1)生（孩子）Shes just given birth to a healthy baby girl.她刚刚生了个健康的女婴。2)产生The extraordinary experience gave birth to his latest novel.这段奇特的经历促成了他的最新的一部小说的诞生。这只狗已经生了个5只小狗狗。The dog _ five baby dogs.has given birth toAbout 2.6 million years agoSome small _ animals with hand
15、s and feet appeared and spread all over the earth.NowHumans produce too much carbon _,making the earth too hot.cleverdioxideThey are putting too much carbon dioxide into the atmosphere,which prevents heat fromescaping from the earth into space.他们把太多的二氧化碳释放到大气层中,这就是使得热量不能从地球上散发到太空中去。prevent sth./sb.(from)doing sth.制止(防止)某人(某物)做某事同义短语：stop sb./sth.(from)doing keep sb./sth.from doingLynns parents tried to _ her _ him.林恩的父母企图阻止她和他见面。You wont _ the things _ happening.你不能阻止事情发生。stopseeingkeep/preventfrom
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