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1、.重点单词重点单词1_ pron.，n.& adj.(英英)万亿；万亿；(美美)十十亿亿2_ adj. 猛烈的；剧烈的；猛烈的；剧烈的；强暴的强暴的3_ prep. 不同；不像不同；不像4_ adj. 有害的有害的5_ vi.& vt. 乘；增加乘；增加billionviolentunlikeharmfulmultiply6_ vi. 存在；生存存在；生存7_ n. 谜；难题 vt.& vi. (使使)迷惑；迷惑；(使使)为难8_ n. 万有引力；重力万有引力；重力9_ adj. 温和的；文雅的温和的；文雅的10_ n. 气候气候existpuzzlegravitygentleclimate1
2、1_ n. 学学说；理；理论12_n. 大气大气层；气氛；气氛13_ adv. 因此；于是因此；于是14_ n. 物理学家物理学家15_ vi.& vt. 碰撞；碰撞；坠落落theoryatmosphere thusphysicistcrash16_ n. 宗教宗教17_ adj. 根本的，根底的根本的，根底的18_ v. (使使)漂浮，漂浮，(使使)浮浮动19_ n& vt. 拉拉(力力)；拖；拖；牵引引力力20_ n. 质量；量；团；块；大；大量；量；(复复)群众群众religionfundamentalfloatpullmass.常用短语常用短语1_ eggs 下蛋下蛋2_ ones t
3、urn 轮到某人；接着轮到某人；接着3get the hang _熟悉；掌握；理熟悉；掌握；理解解4watch _密切注视；留神密切注视；留神；提防；提防5depend _依靠依靠layinofout on6_ time 及及时，终于于7give _产生；分娩生；分娩8cheer _感到快感到快乐；感到振；感到振奋9now _既然既然10break _突突发；爆；爆发inbirth to upthatout .典型句式典型句式1The earth became_violent_it was not clear whether the shape would last or not.地球变得如此
4、猛烈以致于不明确是否它的形地球变得如此猛烈以致于不明确是否它的形状会保持这个样子。状会保持这个样子。【答案】【答案】so；that2This produced a chain reaction，which made_possible_life to develop.这引起一连串的反响，使生命的生长发育成为这引起一连串的反响，使生命的生长发育成为一种可能。一种可能。【答案】【答案】it；for3Last month I was _ _ _have a chance to make a trip into space with my friend Li Yanping，an astronomer.
5、我的朋友李彦平是一位宇航我的朋友李彦平是一位宇航员。上个月我。上个月我有幸得到一个有幸得到一个时机同他一起去太空旅行。机同他一起去太空旅行。【答案】【答案】lucky enough to 4.But when I tried to step forward，I found I was carried_ _ _ _on the earth and fell over.而当我而当我试着向前着向前迈步的步的时候，我候，我觉察我被察我被送出去很送出去很远，步子的跨度竟是在地球上的，步子的跨度竟是在地球上的两倍，因而我摔倒了。两倍，因而我摔倒了。【答案】【答案】twice as far asexplod
6、e with anger勃然大怒勃然大怒explode with laughter哄然大笑哄然大笑explode into laughter突然大笑起来突然大笑起来explode vt.& vi.使爆炸；爆发使爆炸；爆发Many people were injured when the boiler exploded.锅炉爆炸炉爆炸时，许多人受了多人受了伤。At last，his anger exploded.他他终于大于大发雷霆了。雷霆了。explode，burst与与erupt 用法比较：用法比较：(1)explode 指炸弹、火药、瓦斯的爆炸。指炸弹、火药、瓦斯的爆炸。When the
7、bomb exploded，many people were injured.当炸弹爆炸时，许多人受了伤。当炸弹爆炸时，许多人受了伤。(2)burst指炸弹、堤防、血管、气球等指炸弹、堤防、血管、气球等的爆炸或爆裂。的爆炸或爆裂。I put too much air into the bicycle tire and it burst.我给自行车轮胎打了太多的气，它爆掉我给自行车轮胎打了太多的气，它爆掉了。了。(3)erupt 指火山的爆发。指火山的爆发。The volcano erupted.火山爆发了。火山爆发了。1.The report_the myth that pollution i
8、s only a problem for rich countries.AexplodesBexploresCexposes Dexpands【解析】句意【解析】句意为：报告推翻了告推翻了污染染仅是富是富裕国家的裕国家的难题的的说法。法。explode the myth 是是固定搭配，意固定搭配，意为“推翻某一学推翻某一学说等。等。explore开采，开开采，开发，expose暴露，暴露，expand张开，开，扩大，膨大，膨胀。A与与语境相符。境相符。【答案】【答案】Aexist in存在于存在于之中之中exist on靠靠为生生There exists/existed.某地有某地有；存在；存
9、在The laidoff workers mainly exist on bread and tea.下下岗工人主要靠面包和茶生存。工人主要靠面包和茶生存。There exists a good way to solve the existing problem in geography.有一个解决目前地理有一个解决目前地理问题的好方法。的好方法。exist vi.存在；生存存在；生存existence n存在存在come into existence产生；成立；开始存在产生；成立；开始存在in existence存在存在Do you know when the new Marriage La
10、w came into existence?你知道新你知道新?婚姻法婚姻法?是什么时候实施的吗？是什么时候实施的吗？2.People do not now believe in the_of ghosts.Abirth BevidenceCexistence Doccurrence【答案】【答案】Cbe harmful to.对有害有害处be harmless to.对无害无害Smoking is harmful to your health.吸烟吸烟有害健康。有害健康。harmful adj.有害的；伤害的有害的；伤害的harm n& v伤害伤害do sb.harm/do harm to s
11、b./harm sb.对某人有对某人有害害do more harm than good弊大于利弊大于利There is no harm in (sb.s) doing sth.做某事无做某事无害处害处It does no harm (for sb.) to do sth.做某事做某事无害处无害处The court case will do serious harm to my business.这起诉讼案件将严重损害我的生意。这起诉讼案件将严重损害我的生意。He may look fierce，but he means no harm.他可能看上去很凶，但并无恶意。他可能看上去很凶，但并无恶意
12、。3.Doing morning exercises_peoples health.Ado harm to Bdoes good toCis harmful to Dare harmless to【答案】【答案】Bbe disappointed at/about sth.对某事失望某事失望be disappointed to do sth.因做因做而失望而失望be disappointed thatclause对失望失望to ones disappointment令人失望的是令人失望的是 disappoint v.使失望；使使失望；使(希望，方希望，方案等案等)不能实现不能实现He was d
13、isappointed that other guests were not coming.其他客人没有来，他感到失望。其他客人没有来，他感到失望。Im afraid youre very disappointing to me.恐怕恐怕对我来我来说，你真是令人失望。，你真是令人失望。Im sorry to disappoint you，but I cant agree with you there after all.使你失望我心使你失望我心里很不安，不里很不安，不过我我实在是不能同意你的意在是不能同意你的意见。disappointed，surprised，excited，intereste
14、d，frightened等是由过去分词转化来的形容词，常等是由过去分词转化来的形容词，常用人来作主语，表示用人来作主语，表示“感到感到的的。而。而disappointing，surprising，exciting，interesting，frightening等是由现在分词转化来等是由现在分词转化来的形容词，常用物来作主语，表示的形容词，常用物来作主语，表示“令人令人的的。Hearing the news，I was disappointed.听到这个消息，我感到很失望。听到这个消息，我感到很失望。The result of the exam was very disappointing.考试
15、结果非常令人失望。考试结果非常令人失望。4.用用disappoint的适当形式填空的适当形式填空(1)I was_that we played so well but still lost.(2)This had been a_Christmas shopping season.(3)Her_showed on her face.【答案】【答案】(1)disappointed (2)disappointing (3)disappointmentwith this/that method用用这/那种方法那种方法in this/that way用用这/那种方法那种方法by this/these m
16、eans用用这种种/这些方法些方法with method有系有系统的，有条不紊的的，有条不紊的 method n.C 方法，方式；方法，方式；U (思思考、行为的考、行为的)条理、顺序条理、顺序the method of doing sth.做某事的方法做某事的方法You should work with method.你做事情你做事情应该有条理。有条理。He adopted the same method.他采用同他采用同一种方法。一种方法。The teaching method marked a new epoch in education.这种教学方法种教学方法标志着教育的新志着教育的新
17、时代。代。means，method，way与与approach用法用法比较：比较：(1)means着重手段，常与介词着重手段，常与介词by连用。连用。(2)method侧重高层次的，有系统，有条侧重高层次的，有系统，有条理的方法，有时指针对某个问题而采用理的方法，有时指针对某个问题而采用的特殊方法。的特殊方法。(3)way最普遍，最常用的词，可以指一最普遍，最常用的词，可以指一切切“方法，方法方法，方法。(4)approach方法，手段，与方法，手段，与to搭配。搭配。5.At the meeting they discussed three different_to the study of
18、 mathematics.Aapproaches BmeansCmethods Dways【答案】【答案】Aa mass of一一块/团/堆堆masses of大量的大量的the mass of大多数大多数in the mass总体上，整个地体上，整个地the masses群众群众 mass n.(聚成一体的聚成一体的)块；堆；大量；块；堆；大量；大局部；群众；大局部；群众；adj.群众的；大量的；群众的；大量的；vt.& vi.集中；聚集集中；聚集A litter of gas has less mass than a litter of water.一公升汽油的一公升汽油的质量比一公升水的
19、量比一公升水的质量小。量小。There are a mass of children in the yard.在庭院里有很多小孩子。在庭院里有很多小孩子。 The general massed his troops for the final attack.将将军集集结他的他的军队要要进行最后行最后总攻。攻。masses of/a mass of 大量的，许多的，注大量的，许多的，注意该短语修饰名词或代词时句子的谓语动意该短语修饰名词或代词时句子的谓语动词单复数取决于被修饰的词。词单复数取决于被修饰的词。There is a mass of sand on the road.路上有路上有堆沙。
20、堆沙。The mass of black children there have fewer educational opportunities than their white counterparts.那里的大多数黑人孩子受教育的时机比当那里的大多数黑人孩子受教育的时机比当地的白人孩子都要少。地的白人孩子都要少。6.The young dancers looked so charming in their beautiful clothes that we took _ pictures of them.Amany of Bmasses ofCthe number of Da large
21、amount of【解析】句意为：年轻的舞蹈演员穿着【解析】句意为：年轻的舞蹈演员穿着漂亮的衣服看起来如此迷人，我们给他们漂亮的衣服看起来如此迷人，我们给他们拍了大量的照片。拍了大量的照片。masses of表示表示“大量，大量，既可以修饰可数名词，也可以修饰不可数既可以修饰可数名词，也可以修饰不可数名词。名词。many of修饰有限定词的名词，意思修饰有限定词的名词，意思是是“中的很多。中的很多。a large amount of修修饰不可数名词。饰不可数名词。【答案】【答案】B cheer vt.& vi.(使使)快乐；快乐；(对对)欢呼；欢呼；n.愉快；欢呼愉快；欢呼cheer up感到
22、快感到快乐；感到振；感到振奋Cheers！(用于祝酒用于祝酒)干杯！干杯！cheer sb.on (赛跑，比跑，比赛等中等中)以喝彩声鼓励，以喝彩声鼓励，为(某人某人)加油加油Cheer up！The news isnt too bad.振作一点吧！也不是什么坏的消息。振作一点吧！也不是什么坏的消息。The crowd cheered their favourite horses on.观众都替他众都替他们看好的看好的马加油。加油。cheerful adj.快乐的；快乐的快乐的；快乐的cheering n欢呼；喝彩；欢呼；喝彩；adj.令人振奋令人振奋的；令人快乐的的；令人快乐的How che
23、erful you are today！你今天真！你今天真是太快乐了！是太快乐了！Cheering crowds greeted their arrival.欢呼的人群欢送他们的到来。欢呼的人群欢送他们的到来。7.Our football team will compete against the Japanese team this evening.Lets go and_，shall we?Acheer them up Bjoin them upCadd them up Dpick them up【答案】【答案】A keep.from.(from在任何情况下都不省在任何情况下都不省略略)
24、No one can prevent this plan from being carried out.谁也不能阻止也不能阻止这个方案的个方案的实施。施。prevent.from. 防止某事发生防止某事发生from可以省略，但在被动可以省略，但在被动语态中不能省略语态中不能省略 We must prevent (stop) these children (from) playing football in the street.我我们必必须阻止孩子阻止孩子们在大街上踢球。在大街上踢球。 His advice kept me from making a serious mistake.他的忠告使
25、我免于犯他的忠告使我免于犯严重的重的错误。 He kept me from sleeping.他不他不让我睡我睡觉。keep sb.doing sth.表表“使某人一直做某使某人一直做某事事。He kept me sleeping.他一直让我睡觉。他一直让我睡觉。8.All possible means _.However，nothing can _him dying of lung cancer.Ahas tried；stop Bhave tried；keepChas been tried；prevent Dhave been tried；stop【答案】【答案】Don time准准时；按；
26、按时in no time立即；立即；马上上at a time一次；每次一次；每次at one time曾曾经；一度；一度at times有有时ahead of time提前提前for the time being暂时take ones time别着急；慢慢来着急；慢慢来in time及时；终于，总有一天及时；终于，总有一天You will succeed in time because you are always working hard.你你迟早会成功的，因早会成功的，因为你一直在努力工作。你一直在努力工作。The doctor came in time to save her life.
27、医生及医生及时赶到救了她的命。赶到救了她的命。Dont recite all together；one at a time.不要一起背不要一起背诵，一次一个。，一次一个。The boss ordered us to finish our task ahead of time.老板命令我老板命令我们们提前完成任提前完成任务务。与与time有关的句型：有关的句型：Its time to do sth./Its time that sb.did/should do sth.到了某人做某事的时间到了某人做某事的时间It/This is the first/second.time sb.have/has
28、 done.是某人第是某人第次次(完成时完成时)each/every time从句每次从句每次时时Its high time that the government made an adjustment on the export drawback system.早该到政府对出口滞后体系进行调整的早该到政府对出口滞后体系进行调整的时候了。时候了。9.(2021年重年重庆卷卷)I am afraid I cant return the book to you before Friday._.ADont be afraid BBe carefulCNot at all DTake your tim
29、e【解析】句意为：【解析】句意为：恐怕我不能在星恐怕我不能在星期五之前把这本书还给你。期五之前把这本书还给你。慢慢来，慢慢来，不着急。不着急。Dont be afraid 别害怕；别害怕；Be careful小心，留神；小心，留神；Not at all一点也不；一点也不；Take your timeto use as much time as you need without hurrying不用急，慢慢不用急，慢慢来。根据题意只有来。根据题意只有D项符合句意。项符合句意。【答案】【答案】Din turn依次；依次；轮流；流；转而；反而；反过来来by turns轮流；交替流；交替take on
30、es turn轮到某人做到某人做了了Its ones turn to do sth.该轮到某人做某事到某人做某事了了in ones turn轮到某人；接着轮到某人；接着We make every effort to make more films，and in turn this creates further environmental pollution.我们在竭力生我们在竭力生产出更多的电影，反过来这又造成了进产出更多的电影，反过来这又造成了进一步的环境污染。一步的环境污染。We kept watch by turns.我们轮流守望。我们轮流守望。与动词与动词turn有关的短语：有关的短
31、语：turn down关小；拒绝关小；拒绝turn up调大；出现调大；出现turn off关关 (水、煤气或电灯等水、煤气或电灯等)turn on开开 (水、煤气或电灯等水、煤气或电灯等)turn to转向；求助于转向；求助于turn out制造出；原来制造出；原来(是是)；证明；证明(是是)turn over翻过翻过(书页书页)；移交；移交；(使使)翻滚翻滚turn in交出；上缴交出；上缴He turns to me whenever he has difficulties.他一有困难，就来找我。他一有困难，就来找我。Unexpectedly，the weather turned out
32、 pretty nice that day.出乎意料之外，那天天气特别好。出乎意料之外，那天天气特别好。The boy tried to join the club，but was turned down. 那男子想参加俱乐部，但被拒绝了。那男子想参加俱乐部，但被拒绝了。10.He was busy then，so he_ the task to the secretary.Aturned to Bturned overCturned up Dturned out【答案】【答案】B地球地球(开始开始)变得得剧烈烈动乱，不知道乱，不知道这个固体个固体形状是否会形状是否会继续存在下去。存在下去。w
33、hether.or not.在此引在此引导让步状步状语从句，从句，表示表示“无无论还是是；不管是否；不管是否。 The earth became so violent that it was not clear whether theshape wouldlast or not.Whether it rains or not，were playing football on Sundays.无论下不下雨，我们星期日一定踢足球。无论下不下雨，我们星期日一定踢足球。Theyll find out who did it，whether you tell them or not.不管你是否告诉他们，他
34、们都能查出是不管你是否告诉他们，他们都能查出是谁干的。谁干的。whether也可引导名词性从句，应注意与也可引导名词性从句，应注意与if的用的用法区别：法区别：(1)引导宾语从句时，引导宾语从句时，whether和和if可以互换使可以互换使用。这时，用。这时，whether之后可以直接跟之后可以直接跟or not，if之后不能直接跟之后不能直接跟or not。但由。但由whether和和if引导引导的宾语从句末尾都可以加的宾语从句末尾都可以加or not。I dont know whether or not he is coming.我不知道他是否要来。我不知道他是否要来。I dont kno
35、w whether /if he is coming or not.(2)当当whether和和if引导主语从句时，都可以引导主语从句时，都可以置于句尾，用置于句尾，用it作形式主语置于句首。用作形式主语置于句首。用whether引导的主语从句也可直接置于句首，引导的主语从句也可直接置于句首，但但if从句那么不行。从句那么不行。Its still uncertain whether /if he is coming.他是否要来还不一定。他是否要来还不一定。Whether we need it is a different matter.我们是否需要却是另外一回事。我们是否需要却是另外一回事。(
36、3)whether可以引导同位语从句和介词宾语可以引导同位语从句和介词宾语从句、表语从句，也可用在动词不定式前，从句、表语从句，也可用在动词不定式前，if那么不能这样用。那么不能这样用。The question whether we go or not has not been decided yet.我们去还是不去的问题尚未决定。我们去还是不去的问题尚未决定。(同位语从同位语从句句)It depends on whether he likes it.这要看他是否喜欢。这要看他是否喜欢。(介词宾语从句介词宾语从句)The question is whether to go by train o
37、r by plane.问题是坐火车去还是乘飞机去。问题是坐火车去还是乘飞机去。(动词不定式动词不定式)11.Be confident my boy，_ you are born rich or poor.Aif BthatCwhich Dwhether【解析】【解析】在句中在句中whether引导让步状语引导让步状语从句。句意为：孩子，无论你出身贫贱，从句。句意为：孩子，无论你出身贫贱，都要有自信。都要有自信。【答案】【答案】D12(2021年北京卷年北京卷)At first he hated the new job but decided to give himself a few mont
38、hs to see_it got any better.Awhen BhowCwhy Dif【解析】考【解析】考查连词的用法。句意的用法。句意为：一开：一开始他就不喜始他就不喜欢这份新工作，但决定份新工作，但决定给自己几自己几个月的个月的时间看看情况会不会有所好看看情况会不会有所好转。if是是否。否。【答案】【答案】D而当我而当我试着向前着向前迈步的步的时候，我候，我觉察我被察我被送出去很送出去很远，步子的跨度竟是在地球上的，步子的跨度竟是在地球上的两倍，因而我摔倒了。两倍，因而我摔倒了。英英语用用twice表示两倍，两倍以上用基数表示两倍，两倍以上用基数词加加times表示，以下是几种常表示
39、，以下是几种常见的表示倍数的表示倍数的句型。的句型。 But when I tried to step forward，I found I was carried twice as far as on the earth and fell over.(1).timesas.as.(2).times比比较级than.(3).times the size /height /length /weight ofThis room is twice as big as that one.这个房个房间是那个房是那个房间的两倍大。的两倍大。This book is four times thicker th
40、an that one.这本本书比那本比那本书厚厚4倍。倍。The new building is three times the height of the old one.新楼是旧楼的新楼是旧楼的3倍高。倍高。用用.times that of.句型，防止重复前句型，防止重复前面的名词。面的名词。In this area the grain output is five times that of before liberation.这个地区的粮食这个地区的粮食产量是解放前的产量是解放前的5倍。倍。13.With the help of the German experts，the fact
41、ory produced_cars in 1993 as the year before.Aas twice many Bas many as twiceCas twice as many Dtwice as many【解析】【解析】表示倍数、几分之几、百分之表示倍数、几分之几、百分之几的词应放在几的词应放在as.as.前面。前面。【答案】【答案】D14(2021年年陕西卷西卷)Ten years ago the population of our village was_that of theirs.Aas twice large as Btwice as large asCtwice as
42、 much as Das twice much as【解析】由句式【解析】由句式结构看构看该题考考查倍数句型倍数句型的同的同级比比较形式。其正确形式。其正确语序序应为：倍数：倍数词as形容形容词/副副词原原级as其他。其他。【答案】【答案】B “Oh dear，I cried，“walking does need a bit of practice now that gravity has changed.“天哪，我大声天哪，我大声说，“重力改重力改变了，看来了，看来走路也确走路也确实需要需要练一一练了。了。now that是一个是一个连词词组，作，作“既然既然 (since)解，解，连接一个
43、表示原因的状接一个表示原因的状语从从句。在口句。在口语中中这个个that常可省略，而只用常可省略，而只用now连接从句，而接从句，而now在从句中已失去在从句中已失去“现在的在的时间概念概念 (从句中不一定要用从句中不一定要用现在在时态)。Now (that) you are well again，you can work with them.既然你已既然你已经康复了，你就可以跟他康复了，你就可以跟他们一一起工作了。起工作了。Now (that) we are alone，we can speak freely.既然没有既然没有别人了，我人了，我们就可以无拘无束就可以无拘无束地地谈谈了。了。n
44、ow that，because，since与与as用法比较：用法比较：四个词都可以用来引导原因状语从句。四个词都可以用来引导原因状语从句。(1)now that是一个连词词组，相当于是一个连词词组，相当于since(既然既然)，引导原因状语从句，在口语中常，引导原因状语从句，在口语中常省略省略that，而只用，而只用now引导从句，这时要特引导从句，这时要特别注意，不能把别注意，不能把now理解为理解为“现在现在。Now that youve passed your test you can drive on your own.既然你驾驶考试已合格，就可以单独开车既然你驾驶考试已合格，就可以单
45、独开车了。了。(2)because 语气较强，表示直接原因；在答语气较强，表示直接原因；在答复复why的问句时，必须用的问句时，必须用because。The light went out because the oil was out.灯熄了，因为没有油了。灯熄了，因为没有油了。(3)as /since语气较轻，表示明显的原因或语气较轻，表示明显的原因或的事实。的事实。As it is too late，youd better stay here.天太晚了，你最好留在这儿。天太晚了，你最好留在这儿。Since the town is far from here，you may go there
46、 by bus.既然那座小镇离这儿很远，你可以乘公共既然那座小镇离这儿很远，你可以乘公共汽车去。汽车去。15._ we have started，we had better go on.ASo that BNow thatCBecause of DAs a result【解析】【解析】根据题意，用根据题意，用now that (既然既然)。【答案】【答案】B.单词拼写单词拼写1There is a friendly a_of helping each other with difficulties in study in our class.【答案】【答案】atmosphere2She lis
47、tened with a p_expression on her face.【答案】【答案】puzzled3Children should not be allowed to watch_(暴力的暴力的) movies.【答案】【答案】violent4I believe the affair is_(有害的有害的) to the company.【答案】【答案】harmful5Water_(存在存在) in three forms，which are liquid，gas and solid.【答案】【答案】exists6There is a big underground railway_(
48、系系统) in London，which is good for travellers.【答案】【答案】system7The population of China has_(增加增加) slowly than before.【答案】【答案】multiplied8There are many_(理理论) about the origin of life.【答案】【答案】theories9There were m_of dark clouds in the sky.【答案】【答案】masses10The river is so polluted that every day we can see
49、 a lot of things f_on the water.【答案】【答案】floating.短语运用短语运用go by；prevent from；as if；cheer up；break out；now that；get close to；depend on；get the hang of；in time 11The government took immediate measures and the disease was_spreading.【答案】【答案】prevented from12Our success_whether everyone works hard.【答案】【答案】
50、depends on13It was difficult for the helicopters to_ the roof of the building because of the heavy smoke.【答案】【答案】get close to14He_at once when I promised to help him.【答案】【答案】cheered up15They got to the airport by taxi just_for their flight.【答案】【答案】in time16_youve passed your test，you can drive on yo
51、ur own.【答案】【答案】Now that 17Press the button when the light goes on，and youll soon_it.【答案】【答案】get the hang of18A fighting between the two friends_，ending the friendship kept for many years.【答案】【答案】broke out19She felt_she were floating in the air.【答案】【答案】as if20It was foolish of him to let the chance_.
52、【答案】【答案】go by.短文填空短文填空根据课文根据课文HOW LIFE BEGAN ON THE EARTH完成以下短文。完成以下短文。At the very beginning，the earth was just a cloud of21._(energy) dust.Then the dust combined22._a ball moving around the sun.After that，it exploded loudly with fire and rock，23._(produce) water vapour，carbon，dioxide and other gase
53、s，24._in the end made the earths atmosphere.Then the earth25._down，and water，one of the earths special26._，appeared and stayed on the earth，which made27._possible for life to begin28._(develop)Some small plants29._(grow) in the water appeared on the earths surface,30._(follow) by land animals,31._in
54、sects，amphibians，reptiles and the32._important animals called dinosaurs until finally dinosaurs disappeared33._of a sudden and some small clever animals with hands and feet appeared and spread all34._the earth and in place of dinosaurs they became35._most important animals on the planetthat is，human beings.【答案】【答案】21.energetic22.into23.producing24.which25.cooled26.qualities27.it28.to develop29.growing30.followed31.including/like32.most33.all34.over35.the课时作业点击进入链接
