歸納拓展 ①(牛津P327)Give Mary a call; she needs cheering up. 給瑪麗打個電話，她需要人安慰。 ②I do hope she can cheer_up and accept the challenge of life bravely! 我真心希望她能振作起來，勇敢地接受生活的挑戰(zhàn)！ ③They do this in order to encourage crowds to cheer their sports teams. 她們這樣做是為了鼓勵人們?yōu)樗齻兊那蜿牸佑汀?④(朗文P282)The crowd cheered their favourite rider (on)． 觀眾向他們最喜歡的騎士喝彩加油。 跟蹤訓練 Ⅰ.選詞填空 in time；cheer up；watch out；prevent...from；give birth to 1．____________ for his temper！He’s not easy to deal with. Watch out 2．Whenever I’m upset，she always has a good idea to make me ____________. 3．The government has taken measures to ____________ the cultural relics ____________ being damaged. cheer up prevent from 4．It was the study of history that _________________ the social science. 5．If you don’t devote yourself to your studies，you’ll never finish them ____________. gave birth to in time Ⅱ.單項填空 1．Do you think we’ll be ________ to catch the train if we get up early? A．in order　

　　B．so as C．in time

　　D．in case 解析：選C。句意為：你認為如果早點起床我們能及時趕上火車嗎？in order to與so as to表示目的，in case后接從句，用在此處不合適；in time及時，符合語意。 2．All possible means have been tried,but nothing can ______ him dying of lung cancer. A．prevent

　　B．keep C．protect

　　D．prefer 解析：選A。prevent...(from) doing為固定搭配，意為“阻止……做某事”。 3．(2024·大連檢測)After we finish the designing，the company，________ its turn，should do the constructing work. A．in

　　B．on C．a(chǎn)t

　　D．for 解析：選A。句意為：我們完成設計后就該由公司來進行建設了。in one’s turn固定搭配，意思是“輪到某人，接著”。 4．—You are always sitting there watching TV.________，let’s go out for a walk，shall we? —OK，but just a moment.The football game is just over. A．Take your time

　　B．Cheer up C．Take it easy

　　D．Come on 解析：選D。考查交際用語。前半句句意為：你總是坐在那里看電視。走吧,咱們出去散散步，好嗎？come on在此表示責備或不耐煩，意為“來吧,得啦,走吧”。take your time不著急；cheer up高興點；take it easy別緊張。 1(教材P31)“...walking does need a bit of practice now_that gravity has changed.” “……既然重力改變了，走路也確實需要練一練了。” 句型精析 【點津】　now that由于；既然，引導原因狀語從句，有時that 可以省略。 ①Now that you have finished your work,you’d better have a rest.既然你的工作已經(jīng)做完了，最好休息一下吧。 ②Now_(that) the weather is fine，let’s go for a ride. 既然天氣那么好，我們開車去兜風吧。 ③Now you have grown up，you can make up your mind by yourself. 你已長大了，可以自己做決定了。 2(教材P31)But when I tried to step forward，I found I was carried twice_as_far_as on the earth and fell over. 而當我試著向前邁步的時候，我發(fā)覺我被送出去很遠，步子的跨度竟是在地球上的兩倍，因而我摔倒了。 【點津】　倍數(shù)的表達方式： (1)“A＋倍數(shù)＋形容詞或副詞的比較級＋than＋B”，表示“A比B大(長、高、寬等)多少倍”。 (2)“A＋倍數(shù)＋as＋形容詞或副詞的原級＋as＋B”，表示“A是B的多少倍”。 (3)“A＋倍數(shù)＋the size/height/length/width，etc.＋of＋B”，表示“A是B的多少倍”。,(4)A＋倍數(shù)＋what從句。 ①There are_five_times_more_books in our library than in yours.我們圖書館里的書比你們圖書館里的書多五倍。 ②Our city has experienced twice as much rain this year as it did last year. 我們城市今年的降雨量是去年的兩倍。 ③My house is twice the size of my parents’． 我的房子是我父母的兩倍大。 ④The production now is three_times_what it was ten years ago.現(xiàn)在的產(chǎn)量是10年前的3倍。 跟蹤訓練 1．(2011·高考陜西卷)The new stadium being built for the next Asian Games will be ________ the present one. A．a(chǎn)s three times big as

　　B．three times as big as C．a(chǎn)s big as three times D．a(chǎn)s big three times as 解析：選B。句意為：正在為下屆亞運會而建設的新體育館將是目前這個體育館的三倍。本題考查倍數(shù)的表達法。比較常見的表達倍數(shù)的句型有：①...times＋as＋adj./adv.(原級)＋as...；②...times＋adj./adv.(比較級)＋than...；③...times＋the length/width/...＋of...。故選擇B項。 2．Peter’s jacket looked just the same as Jack’s，but it cost ________ his. A．a(chǎn)s much twice as B．twice as much as C．much as twice as

　　D．a(chǎn)s twice much as 解析：選B。句意為：彼得的夾克衫看起來與杰克的一樣，但價格卻是他的兩倍。考查倍數(shù)句型“倍數(shù)詞＋as＋原級＋as...”。 3．Ten years ago the population of our village was ________that of theirs. A．a(chǎn)s twice large as

　　B．twice as large as C．twice as much as

　　D．a(chǎn)s twice much as 解析：選B。句意為：十年前我們村的人口是他們村的兩倍。population往往與large或small搭配，且形容詞比較級的結(jié)構之一為：倍數(shù)＋as＋形容詞原級＋as...。 4．________you’ve got a chance，you might as well make full use of it. A．Now that

　　B．After C．Although

　　D．As soon as 解析：選A。句意為：既然你得到了一次機會，不妨充分利用它。 5．—Did you return Fred’s call? —I didn’t need to________I’ll see him tomorrow. A．though

　　B．unless C．when

　　D．because 解析：選D。根據(jù)語意看，后面的句子表示“沒有必要的原因”，所以用because。 本部分內(nèi)容講解結(jié)束 按ESC鍵退出全屏播放 辨析puzzle/question

　　puzzle 令人迷惑的、難以理解或回答的問題。 question 主觀提出的或需解決、決定的問題。 ①(牛津P1616)What puzzles me is why he left the country without telling anyone. 令我不解的是，他為什么悄悄地離開了這個國家。 ②The police are still puzzling_about/over how the accident could have happened. 警察仍然正在苦思這起事故是怎么發(fā)生的。 ③Scientists have been trying to solve this puzzle for years. 多年來科學家們一直試圖解開這一謎團。 ④(牛津P1616)He looked puzzled so I repeated the question.他好像沒聽懂，于是我又把問題重復了一遍。 3pull　n. & vt.

　　拉(力)；拖；牽引力 (教材P30)As the rocket rose into the air,we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity.　隨著火箭的升空，由于我們在努力掙脫地球的引力，我們被向后推在座位上。 pull down拆毀；摧毀 pull in(車輛)進站停靠；靠邊停靠 pull out駛出；退出 pull through康復；痊愈 歸納拓展 ①He pulled the door open and rushed out. 他拉開門，沖了出去。 ②(牛津P1604)The police car signalled to us to pull_in. 警車發(fā)出信號，要我們駛向路邊停靠。 ③We waved as the train pulled out of the station. 火車駛出車站時我們揮手告別。 ④The doctor told me that I would pull_through. 醫(yī)生告訴我，我會康復的。 【助記】 跟蹤訓練 Ⅰ.選詞填空 system；harmful；exist；climate；pull 1．I consider it ________ for students to play computer games. harmful 2．As far as I know，they are paid hardly enough to _______ on. 3．A focus and concern on ________ change is entirely appropriate. exist climate 4．You have to enter your password before entering this ______. 5．Cheer up！Take more exercise every day and you will

　　________ through. system pull Ⅱ.單項填空 1．If we hadn’t worked so hard，such a good situation wouldn’t have ________ in our factory. A．Survived

　　B．lived C．had

　　D．existed 解析：選D。句意為：如果我們不努力工作的話，我們廠是不會出現(xiàn)這么好的形勢的。survive表示“幸存”；live表示“生活”；have表示“有”，都不符合語意。exist表示“存在”，符合語意。 2．(2024·淄博模擬)________ a certain doubt among the workers as to the necessity of the work. A．It existed

　　B．There existed C．There had

　　D．It had 解析：選B。句意為：對于做這份工作的必要性，工人們存在一定的疑惑。There exists/existed...有；存在；相當于There be...結(jié)構。 3．(2024·臺州模擬)I was lucky enough to get on the train before it ________. A．pulled on

　　B．pulled down C．pulled in

　　D．pulled out 解析：選D。句意為：我很幸運在火車出站前坐上了車。pull out 出站；pull on 穿上；pull down 拆毀；pull in 進站。 短語精釋 1in time　及時；終于，總有一天 (教材P25)They were in time to produce carbon，nitrogen，water vapour and other gases，which were to make the earth’s atmosphere.　最終產(chǎn)生了碳、氮氣、水蒸氣和其他多種氣體，從而形成了地球的大氣層。 歸納拓展 on time 準時；按時 in no time 立即；馬上 at a time 一次；每次 at one time 曾經(jīng)；一度 at times 有時 ahead of time 提前 take one’s time 別著急；慢慢來 ①(朗文P2162)Will you be back in time for dinner? 你會及時趕回來吃晚飯嗎？ ②The kids will be leaving home in_no_time. 孩子們很快就要離開家了。 ③(朗文P2162)I should be back in_time_to_watch the show. 我應該及時趕回來看那場演出。 ④The company fired him for not coming to work on time. 那家公司因他不按時上班而解雇了他。 2in one’s turn　 輪到某人；接著 (教材P26)Thus they have，in their turn，become the most important animals on the planet. 于是，他們接著成為了這個行星上最重要的動物 。 歸納拓展 in turn 依次，輪流；反之，反過來 by turns輪流；交替地 take turns to do sth.輪流做某事 It is one’s turn to do sth.輪到某人做某事 ①When it is in my turn，I am too excited to speak. 當輪到我時，我激動得都說不出話來了。 ②The customer praised the manager,who in turn praised his staff.顧客表揚了經(jīng)理，經(jīng)理轉(zhuǎn)而表揚了員工。 ③All theories are

　　from practice and in_turn serve practice. 所有的理論都來源于實踐，并反過來為實踐服務。 ④Now it_is_your_turn_to look after the children. 現(xiàn)在輪到你照看孩子了。 3prevent...from　阻止；制止 (教材P26)They are putting too much carbon dioxide into the atmosphere，which prevents heat from escaping from the earth into space.　他們把過多的二氧化碳釋放到大氣層中，這使得地球上的熱不能釋放到太空中去。 歸納拓展 ①Once he has made up his mind，no one can prevent

　　him from carrying out the plan. 一旦他下定決心，誰也阻止不了他執(zhí)行這個計劃。 ②(朗文P1612)Guards stood at the doors to prevent anyone from leaving.守衛(wèi)站在門口阻止任何人離開。 ③Measures have been taken to protect_the_rivers_from_being_polluted.已采取措施保護河水不受污染。 4cheer up　感到高興；感到振奮 (教材P31)I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.　我立刻感到很高興，由于失重我在太空艙里飄來飄去，我望著(身后的)地球越來越小，而(前方的)月球越來越大。 Unit 4　Astronomy：the science of the stars ——天文學：恒星科學 基礎盤點自測自評 核心單詞

　　1. They are both teachers.Otherwise they are ____________(不同) . 2. There are many different ____________(方法) to solve this problem. unlike methods 3．We have learnt that oceans cover two thirds of the

　　____________(表面) of the earth. 4．He has finished his new book and it will be

　　____________(出版) next month. surface published 5．Do you think our education ____________(制度) needs improving? 6．I agree with you in

　　____________(理論)，but practically I don’t think we have the time to do that. system theory 7．Thousands of turtles drag themselves onto the beach and

　　____________(下蛋) their eggs in the sand. 8．I noticed her looking at me with a ____________(迷惑的) stare. lay puzzled 9．用harm的適當形式填空 (1)Air pollution will get worse and this will be__________to people，for example，it can cause cancer. (2)Rubbish can be changed into____________things. harmful harmless (3)Don’t_______________your eyes by reading in the dim light. 10．Last night we had a discussion，which became more and more______________.Finally we reached an agreement that we will never use______________whatever happens.(violent) harm violent violence 高頻短語

　　1．________________及時，終于 2．________________

　　下蛋 3．________________

　　產(chǎn)生；分娩 4．________________

　　輪到某人；接著 in time lay eggs give birth to in one’s turn 5．________________

　　阻止；制止 6．________________

　　擋住(光線) 7．________________

　　感到高興；感到振奮 8．________________

　　既然 9．________________

　　突發(fā)；爆發(fā) 10．________________

　　密切注視；當心；提防 prevent...from block out cheer up now that break out watch out 典型句式 1．what引導的主語從句 ____________________(它會變成什么樣) was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. What it was to become 2．so...that... 如此……以至于…… The earth became _______________________(如此猛烈以至于) it was not clear whether the shape would last or not. so violent that 3．it作形式賓語的用法 This produced a chain reaction，which ___________________________________ (使得生命得以發(fā)展)． made it possible for life to develop 4．英語倍數(shù)表示法 But when I tried to step forward，I found I was carried ________________(兩倍遠) on the earth and fell over. twice as far as 主語從句 1．(2024·福建四地六校聯(lián)考)________ is known to us all is that the Chinese government has spared no efforts to protect people from fake food. 單元語法 A．As　 B．It C．That

　　D．What 解析：選D。考查主語從句。What在這里引導主語從句，選D項。此題要注意分析句子結(jié)構，如果題目改為：①________ is known to us all，the Chinese government has spared no efforts to protect people from fake food.該句空處應用As， As引導非限制性定語從句；②________ is known to us all that the Chinese government has spared no efforts to protect people from fake food.該句空處則應用It，It作形式主語。 2．(2024·河南四市聯(lián)考)________you don’t like him is none of my business. A．What

　　B．If C．That

　　D．Whether 解析：選C。考查主語從句。That引導主語從句，在從句中不作成分；What引導主語從句時充當句子成分；If不能引導主語從句；Whether引導的主語從句應是肯定句。由語意可知C項正確。 3．(2024·河北重點中學聯(lián)考)________surprises us most is that she doesn’t even know________the difference between the two lies. A．What；where　

　　B．All；which C．What；that

　　D．That；where 解析：選A。考查名詞性從句。句意為：讓我們最吃驚的是她竟然不知道兩者的區(qū)別在哪兒。“What surprises us most”是主語從句，What在從句中作主語；“where the difference between the two lies”是賓語從句，where表示的是抽象地點。 4．(2024·福建質(zhì)檢)It never occurred to humans until the mid-1990s________some animals can be cloned. A．where

　　B．that C．when

　　D．what 解析：選B。考查名詞性從句。本句中的It作形式主語，真正的主語是some animals can be cloned，根據(jù)名詞性從句“缺什么，補什么”的原則,此處主語從句中不缺成分，所以只填連接詞that，選B項。 5．(2024·唐山二模)It makes his life quite different______he has received higher education abroad. A．that

　　B．which C．what

　　D．how 解析：選A。考查主語從句。本句中的It是形式主語，真正的主語是“that he has received higher education abroad”。 考點串講講練互動 單詞精研 1exist　vi. 存在，生存 (教材P26)They laid eggs too and existed on the earth for more than 140 million years. 它們也生蛋，在地球上生存了一億四千多萬年。 歸納拓展 ①(牛津P697)They can’t exist on the money he’s earning. 他們靠他掙的那點錢無法維持生活。 ②There exists a good way to solve the existing problem in geography.有一個解決現(xiàn)存地理問題的好辦法。 ③No one knows how this world came_into_existence. 沒有人知道這個世界是怎樣形成的。 2puzzle　n. 謎；難題　vt. & vi. (使)迷惑；(使)為難 (教材P27)How life began on earth is one of the biggest puzzles that scientists found hard to solve.　地球生命如何起源是科學家們覺得很難解決的最大的難題之一。 歸納拓展 (1)

　　(2)

　　(1)阻止，制止……

　　(2)protect sb.from/against...保護某人使免受……

　　歸納拓展 ①(牛津P327)Give Mary a call; she needs cheering up. 給瑪麗打個電話，她需要人安慰。 ②I do hope she can cheer_up and accept the challenge of life bravely! 我真心希望她能振作起來，勇敢地接受生活的挑戰(zhàn)！ ③They do this in order to encourage crowds to cheer their sports teams. 她們這樣做是為了鼓勵人們?yōu)樗齻兊那蜿牸佑汀?④(朗文P282)The crowd cheered their favourite rider (on)． 觀眾向他們最喜歡的騎士喝彩加油。 跟蹤訓練 Ⅰ.選詞填空 in time；cheer up；watch out；prevent...from；give birth to 1．____________ for his temper！He’s not easy to deal with. Watch out 2．Whenever I’m upset，she always has a good idea to make me ____________. 3．The government has taken measures to ____________ the cultural relics ____________ being damaged. cheer up prevent from 4．It was the study of history that _________________ the social science. 5．If you don’t devote yourself to your studies，you’ll never finish them ____________. gave birth to in time Ⅱ.單項填空 1．Do you think we’ll be ________ to catch the train if we get up early? A．in order　

　　B．so as C．in time

　　D．in case 解析：選C。句意為：你認為如果早點起床我們能及時趕上火車嗎？in order to與so as to表示目的，in case后接從句，用在此處不合適；in time及時，符合語意。 2．All possible means have been tried,but nothing can ______ him dying of lung cancer. A．prevent

　　B．keep C．protect

　　D．prefer 解析：選A。prevent...(from) doing為固定搭配，意為“阻止……做某事”。 3．(2024·大連檢測)After we finish the designing，the company，________ its turn，should do the constructing work. A．in

　　B．on C．a(chǎn)t

　　D．for 解析：選A。句意為：我們完成設計后就該由公司來進行建設了。in one’s turn固定搭配，意思是“輪到某人，接著”。 4．—You are always sitting there watching TV.________，let’s go out for a walk，shall we? —OK，but just a moment.The football game is just over. A．Take your time

　　B．Cheer up C．Take it easy

　　D．Come on 解析：選D。考查交際用語。前半句句意為：你總是坐在那里看電視。走吧,咱們出去散散步，好嗎？come on在此表示責備或不耐煩，意為“來吧,得啦,走吧”。take your time不著急；cheer up高興點；take it easy別緊張。 1(教材P31)“...walking does need a bit of practice now_that gravity has changed.” “……既然重力改變了，走路也確實需要練一練了。” 句型精析 【點津】　now that由于；既然，引導原因狀語從句，有時that 可以省略。 ①Now that you have finished your work,you’d better have a rest.既然你的工作已經(jīng)做完了，最好休息一下吧。 ②Now_(that) the weather is fine，let’s go for a ride. 既然天氣那么好，我們開車去兜風吧。 ③Now you have grown up，you can make up your mind by yourself. 你已長大了，可以自己做決定了。 2(教材P31)But when I tried to step forward，I found I was carried twice_as_far_as on the earth and fell over. 而當我試著向前邁步的時候，我發(fā)覺我被送出去很遠，步子的跨度竟是在地球上的兩倍，因而我摔倒了。 【點津】　倍數(shù)的表達方式： (1)“A＋倍數(shù)＋形容詞或副詞的比較級＋than＋B”，表示“A比B大(長、高、寬等)多少倍”。 (2)“A＋倍數(shù)＋as＋形容詞或副詞的原級＋as＋B”，表示“A是B的多少倍”。 (3)“A＋倍數(shù)＋the size/height/length/width，etc.＋of＋B”，表示“A是B的多少倍”。,(4)A＋倍數(shù)＋what從句。 ①There are_five_times_more_books in our library than in yours.我們圖書館里的書比你們圖書館里的書多五倍。 ②Our city has experienced twice as much rain this year as it did last year. 我們城市今年的降雨量是去年的兩倍。 ③My house is twice the size of my parents’． 我的房子是我父母的兩倍大。 ④The production now is three_times_what it was ten years ago.現(xiàn)在的產(chǎn)量是10年前的3倍。 跟蹤訓練 1．(2011·高考陜西卷)The new stadium being built for the next Asian Games will be ________ the present one. A．a(chǎn)s three times big as

　　B．three times as big as C．a(chǎn)s big as three times D．a(chǎn)s big three times as 解析：選B。句意為：正在為下屆亞運會而建設的新體育館將是目前這個體育館的三倍。本題考查倍數(shù)的表達法。比較常見的表達倍數(shù)的句型有：①...times＋as＋adj./adv.(原級)＋as...；②...times＋adj./adv.(比較級)＋than...；③...times＋the length/width/...＋of...。故選擇B項。 2．Peter’s jacket looked just the same as Jack’s，but it cost ________ his. A．a(chǎn)s much twice as B．twice as much as C．much as twice as

　　D．a(chǎn)s twice much as 解析：選B。句意為：彼得的夾克衫看起來與杰克的一樣，但價格卻是他的兩倍。考查倍數(shù)句型“倍數(shù)詞＋as＋原級＋as...”。 3．Ten years ago the population of our village was ________that of theirs. A．a(chǎn)s twice large as

　　B．twice as large as C．twice as much as

　　D．a(chǎn)s twice much as 解析：選B。句意為：十年前我們村的人口是他們村的兩倍。population往往與large或small搭配，且形容詞比較級的結(jié)構之一為：倍數(shù)＋as＋形容詞原級＋as...。 4．________you’ve got a chance，you might as well make full use of it. A．Now that

　　B．After C．Although

　　D．As soon as 解析：選A。句意為：既然你得到了一次機會，不妨充分利用它。 5．—Did you return Fred’s call? —I didn’t need to________I’ll see him tomorrow. A．though

　　B．unless C．when

　　D．because 解析：選D。根據(jù)語意看，后面的句子表示“沒有必要的原因”，所以用because。 本部分內(nèi)容講解結(jié)束 按ESC鍵退出全屏播放 辨析puzzle/question

　　puzzle 令人迷惑的、難以理解或回答的問題。 question 主觀提出的或需解決、決定的問題。 ①(牛津P1616)What puzzles me is why he left the country without telling anyone. 令我不解的是，他為什么悄悄地離開了這個國家。 ②The police are still puzzling_about/over how the accident could have happened. 警察仍然正在苦思這起事故是怎么發(fā)生的。 ③Scientists have been trying to solve this puzzle for years. 多年來科學家們一直試圖解開這一謎團。 ④(牛津P1616)He looked puzzled so I repeated the question.他好像沒聽懂，于是我又把問題重復了一遍。 3pull　n. & vt.

　　拉(力)；拖；牽引力 (教材P30)As the rocket rose into the air,we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity.　隨著火箭的升空，由于我們在努力掙脫地球的引力，我們被向后推在座位上。 pull down拆毀；摧毀 pull in(車輛)進站停靠；靠邊停靠 pull out駛出；退出 pull through康復；痊愈 歸納拓展 ①He pulled the door open and rushed out. 他拉開門，沖了出去。 ②(牛津P1604)The police car signalled to us to pull_in. 警車發(fā)出信號，要我們駛向路邊停靠。 ③We waved as the train pulled out of the station. 火車駛出車站時我們揮手告別。 ④The doctor told me that I would pull_through. 醫(yī)生告訴我，我會康復的。 【助記】 跟蹤訓練 Ⅰ.選詞填空 system；harmful；exist；climate；pull 1．I consider it ________ for students to play computer games. harmful 2．As far as I know，they are paid hardly enough to _______ on. 3．A focus and concern on ________ change is entirely appropriate. exist climate 4．You have to enter your password before entering this ______. 5．Cheer up！Take more exercise every day and you will

　　________ through. system pull Ⅱ.單項填空 1．If we hadn’t worked so hard，such a good situation wouldn’t have ________ in our factory. A．Survived

　　B．lived C．had

　　D．existed 解析：選D。句意為：如果我們不努力工作的話，我們廠是不會出現(xiàn)這么好的形勢的。survive表示“幸存”；live表示“生活”；have表示“有”，都不符合語意。exist表示“存在”，符合語意。 2．(2024·淄博模擬)________ a certain doubt among the workers as to the necessity of the work. A．It existed

　　B．There existed C．There had

　　D．It had 解析：選B。句意為：對于做這份工作的必要性，工人們存在一定的疑惑。There exists/existed...有；存在；相當于There be...結(jié)構。 3．(2024·臺州模擬)I was lucky enough to get on the train before it ________. A．pulled on

　　B．pulled down C．pulled in

　　D．pulled out 解析：選D。句意為：我很幸運在火車出站前坐上了車。pull out 出站；pull on 穿上；pull down 拆毀；pull in 進站。 短語精釋 1in time　及時；終于，總有一天 (教材P25)They were in time to produce carbon，nitrogen，water vapour and other gases，which were to make the earth’s atmosphere.　最終產(chǎn)生了碳、氮氣、水蒸氣和其他多種氣體，從而形成了地球的大氣層。 歸納拓展 on time 準時；按時 in no time 立即；馬上 at a time 一次；每次 at one time 曾經(jīng)；一度 at times 有時 ahead of time 提前 take one’s time 別著急；慢慢來 ①(朗文P2162)Will you be back in time for dinner? 你會及時趕回來吃晚飯嗎？ ②The kids will be leaving home in_no_time. 孩子們很快就要離開家了。 ③(朗文P2162)I should be back in_time_to_watch the show. 我應該及時趕回來看那場演出。 ④The company fired him for not coming to work on time. 那家公司因他不按時上班而解雇了他。 2in one’s turn　 輪到某人；接著 (教材P26)Thus they have，in their turn，become the most important animals on the planet. 于是，他們接著成為了這個行星上最重要的動物 。 歸納拓展 in turn 依次，輪流；反之，反過來 by turns輪流；交替地 take turns to do sth.輪流做某事 It is one’s turn to do sth.輪到某人做某事 ①When it is in my turn，I am too excited to speak. 當輪到我時，我激動得都說不出話來了。 ②The customer praised the manager,who in turn praised his staff.顧客表揚了經(jīng)理，經(jīng)理轉(zhuǎn)而表揚了員工。 ③All theories are

　　from practice and in_turn serve practice. 所有的理論都來源于實踐，并反過來為實踐服務。 ④Now it_is_your_turn_to look after the children. 現(xiàn)在輪到你照看孩子了。 3prevent...from　阻止；制止 (教材P26)They are putting too much carbon dioxide into the atmosphere，which prevents heat from escaping from the earth into space.　他們把過多的二氧化碳釋放到大氣層中，這使得地球上的熱不能釋放到太空中去。 歸納拓展 ①Once he has made up his mind，no one can prevent

　　him from carrying out the plan. 一旦他下定決心，誰也阻止不了他執(zhí)行這個計劃。 ②(朗文P1612)Guards stood at the doors to prevent anyone from leaving.守衛(wèi)站在門口阻止任何人離開。 ③Measures have been taken to protect_the_rivers_from_being_polluted.已采取措施保護河水不受污染。 4cheer up　感到高興；感到振奮 (教材P31)I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.　我立刻感到很高興，由于失重我在太空艙里飄來飄去，我望著(身后的)地球越來越小，而(前方的)月球越來越大。 Unit 4　Astronomy：the science of the stars ——天文學：恒星科學 基礎盤點自測自評 核心單詞

　　1. They are both teachers.Otherwise they are ____________(不同) . 2. There are many different ____________(方法) to solve this problem. unlike methods 3．We have learnt that oceans cover two thirds of the

　　____________(表面) of the earth. 4．He has finished his new book and it will be

　　____________(出版) next month. surface published 5．Do you think our education ____________(制度) needs improving? 6．I agree with you in

　　____________(理論)，but practically I don’t think we have the time to do that. system theory 7．Thousands of turtles drag themselves onto the beach and

　　____________(下蛋) their eggs in the sand. 8．I noticed her looking at me with a ____________(迷惑的) stare. lay puzzled 9．用harm的適當形式填空 (1)Air pollution will get worse and this will be__________to people，for example，it can cause cancer. (2)Rubbish can be changed into____________things. harmful harmless (3)Don’t_______________your eyes by reading in the dim light. 10．Last night we had a discussion，which became more and more______________.Finally we reached an agreement that we will never use______________whatever happens.(violent) harm violent violence 高頻短語

　　1．________________及時，終于 2．________________

　　下蛋 3．________________

　　產(chǎn)生；分娩 4．________________

　　輪到某人；接著 in time lay eggs give birth to in one’s turn 5．________________

　　阻止；制止 6．________________

　　擋住(光線) 7．________________

　　感到高興；感到振奮 8．________________

　　既然 9．________________

　　突發(fā)；爆發(fā) 10．________________

　　密切注視；當心；提防 prevent...from block out cheer up now that break out watch out 典型句式 1．what引導的主語從句 ____________________(它會變成什么樣) was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. What it was to become 2．so...that... 如此……以至于…… The earth became _______________________(如此猛烈以至于) it was not clear whether the shape would last or not. so violent that 3．it作形式賓語的用法 This produced a chain reaction，which ___________________________________ (使得生命得以發(fā)展)． made it possible for life to develop 4．英語倍數(shù)表示法 But when I tried to step forward，I found I was carried ________________(兩倍遠) on the earth and fell over. twice as far as 主語從句 1．(2024·福建四地六校聯(lián)考)________ is known to us all is that the Chinese government has spared no efforts to protect people from fake food. 單元語法 A．As　 B．It C．That

　　D．What 解析：選D。考查主語從句。What在這里引導主語從句，選D項。此題要注意分析句子結(jié)構，如果題目改為：①________ is known to us all，the Chinese government has spared no efforts to protect people from fake food.該句空處應用As， As引導非限制性定語從句；②________ is known to us all that the Chinese government has spared no efforts to protect people from fake food.該句空處則應用It，It作形式主語。 2．(2024·河南四市聯(lián)考)________you don’t like him is none of my business. A．What

　　B．If C．That

　　D．Whether 解析：選C。考查主語從句。That引導主語從句，在從句中不作成分；What引導主語從句時充當句子成分；If不能引導主語從句；Whether引導的主語從句應是肯定句。由語意可知C項正確。 3．(2024·河北重點中學聯(lián)考)________surprises us most is that she doesn’t even know________the difference between the two lies. A．What；where　

　　B．All；which C．What；that

　　D．That；where 解析：選A。考查名詞性從句。句意為：讓我們最吃驚的是她竟然不知道兩者的區(qū)別在哪兒。“What surprises us most”是主語從句，What在從句中作主語；“where the difference between the two lies”是賓語從句，where表示的是抽象地點。 4．(2024·福建質(zhì)檢)It never occurred to humans until the mid-1990s________some animals can be cloned. A．where

　　B．that C．when

　　D．what 解析：選B。考查名詞性從句。本句中的It作形式主語，真正的主語是some animals can be cloned，根據(jù)名詞性從句“缺什么，補什么”的原則,此處主語從句中不缺成分，所以只填連接詞that，選B項。 5．(2024·唐山二模)It makes his life quite different______he has received higher education abroad. A．that

　　B．which C．what

　　D．how 解析：選A。考查主語從句。本句中的It是形式主語，真正的主語是“that he has received higher education abroad”。 考點串講講練互動 單詞精研 1exist　vi. 存在，生存 (教材P26)They laid eggs too and existed on the earth for more than 140 million years. 它們也生蛋，在地球上生存了一億四千多萬年。 歸納拓展 ①(牛津P697)They can’t exist on the money he’s earning. 他們靠他掙的那點錢無法維持生活。 ②There exists a good way to solve the existing problem in geography.有一個解決現(xiàn)存地理問題的好辦法。 ③No one knows how this world came_into_existence. 沒有人知道這個世界是怎樣形成的。 2puzzle　n. 謎；難題　vt. & vi. (使)迷惑；(使)為難 (教材P27)How life began on earth is one of the biggest puzzles that scientists found hard to solve.　地球生命如何起源是科學家們覺得很難解決的最大的難題之一。 歸納拓展 (1)

　　(2)

　　(1)阻止，制止……

　　(2)protect sb.from/against...保護某人使免受……