高一必修三unit4课件

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1、英语必修3(人教版)Reading 一1From Paragraph 1 we can know that stars are created from_Aair Batoms Crocks DiceB 一、根据课文“How life began on the earth”，选择正确答案。2What does the word“they”refer to in the sentences“It exploded loudly with fire and rock.They were in time to produce carbon,nitrogen，water vapour and.”in

2、Paragraph 2?APlanets.BStars.CGases.DFire and rock.D3Which is the right order of the development of life?ASmall clever animalsshellfishdinosaursmammals.BShellfishdinosaurssmall clever animalsmammals.CShellfishdinosaursmammalssmall clever animals.DDinosaursshellfishmammalssmall clever animals.C4Why we

3、re mammals different from other life forms?AThey gave birth to young baby animals and produced milk to feed them.BThey produced young generally by laying eggs.CThey were able to live on land as well as in the water.DThey live on grass.A5What problem is caused by human beings?AThey exist everywhere o

4、n the earth.BThey cause global warming.CThey find new methods of growing crops.DThey enjoy hunting and fishing.B四、短文填空。No one knows exactly 1._the earth began.According to a widely accepted theory,the earth began with a“Big Bang”,2._exploded loudly and produced water vapour and many gases,3._(make)t

5、he earths atmosphere.As the earth cooled down,water appeared and stayed 4._the surface.It was the presence of water 5._allowed the earth to dissolve harmful gases and acids into the oceans and seas,which made 6._possible for life to develop.First,the appearance of small plants encouraged the develop

6、ment of early shellfish and all sorts of fish.Next,green plants began to grow on land.7._were followed by land animals.So reptiles appeared for the first time.Later,dinosaurs developed.8._，they suddenly disappeared.After that,mammals came into being.Finally,humans appeared and spread all over the ea

7、rth.However,they are putting too much carbon dioxide into the atmosphere,making the earth too hot 9._(live)on.So whether life will continue on the earth will depend on 10._this problem can be solved.howwhichmakingonthatitTheyHoweverto livewhether默写根据所给英文解释写出下列单词。1_：very strong and sudden.2_：to make

8、sb.feel confused because they do not understand sth.3_：to be present in a place or situation.4_：causing harm.5_：an idea or opinion.violentpuzzleexistharmfultheory1However，according to a widely accepted theory，the universe began with a“Big Bang”that threw matter in all directions.(p.25)然而，一种普遍为人们所接受的

9、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。词语链接begin withstart with 以开始；由作为开头to begin with 首先，第一点即学即练选用上述词语完成下列句子。(1)The proceedings will_a speech to welcome the guests.(2)The party _ a song.(3)_，we must consider the problem all sidedly.begin withbegan withTo begin with2They were in time to produce carbon dioxi

10、de，nitrogen，water vapour and other gases.(p.25)它们最终产生了二氧化碳、氮、水蒸气和其他气体。词语链接in time 及时；终于；迟早at one time 曾经，一度at times 有时，间或at a time 一次，依次in no time 几乎，马上地，立刻on time 准时；曾经ahead of time 提前for the time being 暂时from time to time 不时地at the same time 同时，但是即学即练用上述短语完成下列句子。(1)They sent the mail to me just_，b

11、efore I left.(2)William arrived at the theatre just_for the play was to be on.(3)Hurry up!The concert willbegin_in timein no timein time(4)_will I give up.(5)The boy laughed and cried_.(6)_he was addicted to playing web games,but now he devotes himself to writing,which delights his parents.At no tim

12、eat the same timeAt one time(7)Dont try to do everything at once,take it a bit_(8)Youll have your own office soon,but_youll have to share one with me.(9)Were determined that the work shall be finished_(提前)at a timefor the time beingahead of time3Water had also appeared on other planets like Mars but

13、 unlike the earth，it had disappeared later.(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。词语辨析：词语辨析：unlike，dislikeunlike(不像不像)是是 介词介词 like(像像)的反义词。的反义词。dislike(不喜欢不喜欢)是是 动词动词 like(喜欢喜欢)的反义词。的反义词。A person，unlike a machine，is not replaceable.人和机器不同，是不可替代的。人和机器不同，是不可替代的。He dislikes dogs.他不喜欢狗。他不喜欢狗。即学即练根据

14、句子的意思在括号里填入适当的词。(1)A good hotel manager should know his regular guests likes and_(2)Her latest novel is quite_her earlier work.(3)If you go on like that youll get yourself_(like)(4)I was very interested in the lecture，_many of the students.dislikesunlikedislikedunlike4What many scientists believe is

15、 that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.(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。词语链接harmful adj.有害的，伤害的harm v.&n.伤害harmfully adv.伤害地harmless adj.无害的 harmlessly adv.无害地be harmful to 对有害do harm to对有害do sb.harm对某人有害come to harm

16、受到损害come to no harm未受到伤害即学即练选用上述词语完成下列句子。(1)Its_to your eyes to read in the bus.(2)Drunkenness(醉酒)_our health.(3)Nuclear power(核能)will_our health and safety if improperly used.(4)They had done their best to_ _(防止小孩们受到任何伤害)harmfulis harmful todo harm toprevent children from any harm5They produced you

17、ng generally by laying eggs.(p.26)它们通常是通过孵蛋来繁殖后代的。lay vt.(laid,laid,laying)把放下；摆设；铺(地毯)；产(蛋)词语链接lay eggs 下蛋lay sth.aside 把某物放在一边；积蓄(钱)lay sth.down 把某物放下lay the blame on sb.责备某人lay the table 摆桌子lay emphasis/stress on sth.把重点放在某事上即学即练 根据句子的意思在括号里填入适当的词语。(1)The bird_its eggs in other birds nests.(2)he

18、is a political leader that_(非常强调)individual responsibility.(3)He_some money_for rainy days.layslays great stress onlays aside 6They laid eggs too and existed on the earth for more than 140 million years.(p.26)它们也生蛋，在地球上生存了1.4亿年。词语链接exist vi.存在；生存existence n存在exist介词.存在于地方exist on sth.靠某物生存Does life

19、exist on Mars?火星上有生命吗？I can hardly exist on the wage Im getting.我靠我挣的工资简直难以糊口。即学即练 用exist的短语或其适当形式填空。(1)This plant_only_Australia.(2)Can you_such a low salary?(3)I doubt the_(exist)of alien.exists inexist on toexistence7Thus they have，in their turn，become the most important animals on the planet.(p.

20、26)于是，他们接着成为这个行星上最重要的动物。in ones turn 轮到某人；接着in turn 轮流；一个接着一个by turns 轮流；一阵一阵take turns(to do sth.)轮流(做某事)Its ones turn to do sth.轮到某人做某事了Its your turn to clean the classroom.轮到你打扫教室了。词语链接即学即练用上述短语完成下列句子。(1)She went hot and cold_(2)In our class，each students recitation comes_(轮流)(3)They，_，made a pro

21、posal.(4)Each of you must_(依次发言)by turnsby turns/in turnin their turntake turns to make a speech 8How life began on earth is one of the biggest puzzles that scientists found hard to solve.(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。词语链接puzzle n难题 v迷惑 puzzlement n迷惑puzzled adj.感到困惑的puzzling adj.使迷惑的 be puzzled

22、about 对感到疑惑即学即练选用上述词语完成下列句子。(1)To explain the_findings,he offers two theories.(2)I_that I havent heard from Tom for so long.(3)She listened with a_ expression on her face.(4)No one has yet succeeded in explaining the_of how life began.puzzlingam puzzledpuzzlepuzzledwas puzzledWhat puzzles me此句为主从复合句。主语为主语从句，从句由连词whether 引导，不定式to come作years的定语。whether this problem can be solved是depend on的宾语从句。即学即练将下列句子译成英语，并分析其结构。(1)使我兴奋的是，父亲给我买了一辆单车。_(2)我是否离开这家公司去深圳取决于老板怎样对我。_