高一必修三unit4课件

英语·必修3()高一必修三unit4

Reading一高一必修三unit41．FromParagraph1wecanknowthatstarsarecreatedfrom________．A．air

B．atoms

C．rocks

D．iceB

一、根据课文“Howlifebeganontheearth”，选择正确答案。高一必修三unit42．Whatdoestheword“they”refertointhesentences“Itexplodedloudlywithfireandrock.Theywereintimetoproducecarbon,nitrogen，watervapourand...”inParagraph2?A．Planets.B．Stars.C．Gases.D．Fireandrock.D高一必修三unit43．Whichistherightorderofthedevelopmentoflife?A．Smallcleveranimals—shellfish—dinosaurs—mammals.B．Shellfish—dinosaurs—smallcleveranimals—mammals.C．Shellfish—dinosaurs—mammals—smallcleveranimals.D．Dinosaurs—shellfish—mammals—smallcleveranimals.C高一必修三unit44．Whyweremammalsdifferentfromotherlifeforms?A．Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.B．Theyproducedyounggenerallybylayingeggs.C．Theywereabletoliveonlandaswellasinthewater.D．Theyliveongrass.A高一必修三unit45．Whatproblemiscausedbyhumanbeings?

A．Theyexisteverywhereontheearth.B．Theycauseglobalwarming.C．Theyfindnewmethodsofgrowingcrops.D．Theyenjoyhuntingandfishing.B高一必修三unit4四、短文填空。Nooneknowsexactly1.________theearthbegan.Accordingtoawidelyacceptedtheory,theearthbeganwitha“BigBang”,2.________explodedloudlyandproducedwatervapourandmanygases,3.________(make)theearth'satmosphere.Astheearthcooleddown,waterappearedandstayed4.________thesurface.Itwasthepresenceofwater5.________allowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas,whichmade6.________possibleforlifetodevelop.First,theappearanceofsmallplantsencouragedthedevelopmentofearlyshellfishandallsortsoffish.Next,greenplantsbegantogrowonland.7.________werefollowedbylandanimals.Soreptilesappearedforthefirsttime.Later,dinosaursdeveloped.8.________，theysuddenlydisappeared.Afterthat,mammalscameintobeing.Finally,humansappearedandspreadallovertheearth.However,theyareputtingtoomuchcarbondioxideintotheatmosphere,makingtheearthtoohot9.________(live)on.Sowhetherlifewillcontinueontheearthwilldependon10.________thisproblemcanbesolved.howwhichmakingonthatitTheyHowevertolivewhether高一必修三unit4单词默写根据所给英文解释写出下列单词。1．________：verystrongandsudden.2．________：tomakesb.feelconfusedbecausetheydonotunderstandsth..3．________：tobepresentinaplaceorsituation.4．________：causingharm.5．________：anideaoropinion.violentpuzzleexistharmfultheory高一必修三unit41．However，accordingtoawidelyacceptedtheory，theuniversebeganwitha“BigBang”thatthrewmatterinalldirections.(p.25)然而，一种普遍为人们所接受的理论是：宇宙起源于一次大爆炸，这次大爆炸将物质投射到四面八方。languagepoints高一必修三unit4词语链接beginwith＝startwith以……开始；由……作为开头tobeginwith

首先，第一点高一必修三unit4即学即练选用上述词语完成下列句子。

(1)Theproceedingswill________________aspeechtowelcometheguests.(2)Theparty____________asong.(3)________________，wemustconsidertheproblemallsidedly.beginwithbeganwithTobeginwith高一必修三unit42．Theywereintimetoproducecarbondioxide，nitrogen，watervapourandothergases.(p.25)它们最终产生了二氧化碳、氮、水蒸气和其他气体。高一必修三unit4词语链接intime

及时；终于；迟早atonetime

曾经，一度attimes

有时，间或atatime

一次，依次innotime

几乎，马上地，立刻ontime

准时；曾经aheadoftime

提前forthetimebeing

暂时fromtimetotime

不时地atthesametime同时，但是高一必修三unit4即学即练用上述短语完成下列句子。(1)Theysentthemailtomejust____________，beforeIleft.(2)Williamarrivedatthetheatrejust______________fortheplaywastobeon.(3)Hurryup!Theconcertwillbegin_____________________________________________intimeinnotimeintime高一必修三unit4(4)________________________willIgiveup.(5)Theboylaughedandcried_____________________________________.(6)________________________hewasaddictedtoplayingwebgames,butnowhedevoteshimselftowriting,whichdelightshisparents.AtnotimeatthesametimeAtonetime高一必修三unit4(7)Don'ttrytodoeverythingatonce,takeitabit____________________．(8)You'llhaveyourownofficesoon,but__________________________you'llhavetoshareonewithme.(9)We'redeterminedthattheworkshallbefinished________________(提前)．atatimeforthetimebeingaheadoftime高一必修三unit43．WaterhadalsoappearedonotherplanetslikeMarsbutunliketheearth，ithaddisappearedlater.(p.26)

水也出现在像火星那样的其他行星上，但和地球不同，其他行星上的水后来都消失了。高一必修三unit4词语辨析：unlike，dislike①unlike(不像)是介词

like(像)的反义词。②dislike(不喜欢)是动词like(喜欢)的反义词。Aperson，unlikeamachine，isnotreplaceable.人和机器不同，是不可替代的。Hedislikesdogs.他不喜欢狗。高一必修三unit4即学即练根据句子的意思在括号里填入适当的词。(1)Agoodhotelmanagershouldknowhisregularguests'likesand________．(2)Herlatestnovelisquite________herearlierwork.(3)Ifyougoonlikethatyou'llgetyourself________(like)．(4)Iwasveryinterestedinthelecture，________manyofthestudents.dislikesunlikedislikedunlike高一必修三unit44．Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.(p.26)许多科学家认为水的长期存在使地球得以把有害的气体和酸溶解在海洋里。高一必修三unit4词语链接harmfuladj.有害的，伤害的harmv.&n.伤害harmfully

adv.伤害地harmless

adj.无害的harmlessly

adv.无害地beharmfulto

对……有害doharmto对……有害dosb.harm对某人有害cometoharm受到损害cometonoharm未受到伤害高一必修三unit4即学即练选用上述词语完成下列句子。(1)It's________toyoureyestoreadinthebus.(2)Drunkenness(醉酒)______________ourhealth.(3)Nuclearpower(核能)will______________ourhealthandsafetyifimproperlyused.(4)Theyhaddonetheirbestto_________________________(防止小孩们受到任何伤害)．harmfulisharmfultodoharmtopreventchildrenfromanyharm高一必修三unit45．Theyproducedyounggenerallybylayingeggs.(p.26)它们通常是通过孵蛋来繁殖后代的。layvt.(laid,laid,laying)把放下；摆设；铺(地毯)；产(蛋)高一必修三unit4词语链接layeggs

下蛋laysth.aside

把某物放在一边；积蓄(钱)laysth.down

把某物放下laytheblameonsb.责备某人laythetable摆桌子layemphasis/stressonsth.把重点放在某事上高一必修三unit4即学即练根据句子的意思在括号里填入适当的词语。(1)Thebird________itseggsinotherbirds'nests.(2)heisapoliticalleaderthat________________________________(非常强调)individualresponsibility.(3)He________somemoney________forrainydays.layslaysgreatstressonlaysaside高一必修三unit46．Theylaideggstooandexistedontheearthformorethan140millionyears.(p.26)它们也生蛋，在地球上生存了1.4亿年。高一必修三unit4词语链接existvi.存在；生存existencen．存在exist＋介词.存在于地方existonsth.靠某物生存DoeslifeexistonMars?火星上有生命吗？IcanhardlyexistonthewageI'mgetting.我靠我挣的工资简直难以糊口。高一必修三unit4即学即练

用exist的短语或其适当形式填空。(1)Thisplant________only________Australia.(2)Canyou________________suchalowsalary?(3)Idoubtthe________(exist)ofalien.existsinexistontoexistence高一必修三unit47．Thustheyhave，intheirturn，becomethemostimportantanimalsontheplanet.(p.26)于是，他们接着成为这个行星上最重要的动物。高一必修三unit4inone'sturn

轮到某人；接着inturn

轮流；一个接着一个byturns

轮流；一阵……一阵……taketurns(todosth.)

轮流(做某事)It'sone'sturntodosth.轮到某人做某事了It'syourturntocleantheclassroom.轮到你打扫教室了。词语链接高一必修三unit4即学即练用上述短语完成下列句子。(1)Shewenthotandcold________________．(2)Inourclass，eachstudent'srecitationcomes________________(轮流)．(3)They，_______________，madeaproposal.(4)Eachofyoumust______________________________(依次发言)．byturnsbyturns/inturnintheirturntaketurnstomakeaspeech高一必修三unit48．Howlifebeganonearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.(p.27)生命到底是如何开始的是科学家们觉得最难解决的难题之一。高一必修三unit4词语链接puzzlen．难题v．迷惑puzzlementn．