第一部分 必修三 Unit 4.doc

阅读词汇请匹配下列单词与其词义1．astronomy A．adv.失重地2．weightlessly B．n.天文学3．solar C．n.生物学家4．biologist D．n.碳5．carbon E．adj.太阳的；日光的6．dissolve F．n.酸7．acid G．n.二氧化物8．mammal H．vt.& vi溶解；解散9．dioxide I．adj.灭绝的；绝种的10．extinct J．n.哺乳动物答案 1.B 2.A 3.E 4.C 5.D 6.H7.F8.J9.G10.I高频词汇请根据汉语提示完成下列词块1．unlike her mother不像她母亲2．multiply and divide乘法和除法3．crash into a tree撞在树上4．float down the river沿河漂流5．theory and practice理论与实践6．exist only in Africa只存在于非洲7．lessen the risk of heart disease减少患心脏病的几率8．a reaction to a question对问题的反应9．a gentle and sensitive man一个和蔼而又善解人意的人10．give a pull at the rope拉一下绳子11．be in a puzzle about sth对某事迷惑不解12．arrive in__time及时到达必仿佳句1.[原句] This produced a chainreaction, which made it possible forlife to develop.2．[原句] But when I tried to stepforward, I found I was carried twiceas far as on the earth and fell over.3．[原句] “Oh, dear，” I cried,“w alking does need a bit of practicenow that gravity has changed.”4．[原句] We watched, amazed as firebroke out on the outside of thespaceship as the earth’s gravityincreased.1．[仿写] 这个女孩懂三门外语，这使她更容易找到一份好工作。

The girl knows three foreignlanguages, whichmakes__it__easier__for__her__to__find__a__good__job．2．[仿写] 杰西卡付出的时间和精力是以前的三倍，所以我相信她这次能成功。

Jessica devotedthree__times__as__much__time__and__energy__as she did before, so Ibelieve she will succeed this time.3．[仿写] 既然它对我们的好处如此多，为什么不试一试呢？Now__that__it__benefits__us somuch, why not have a try?4．[仿写] 长途旅行之后，我们三人回到了家，又饿又累。

After the long journey, the three of uswent back home,hungry__and__tired.1.exist vi.存在，在于(1)exist on＝live on靠……为生There exist(s)/existed... 某地有/存在……(2)existence n. 存在；生存come into existence 产生；成立；开始存在(3)existing adj. (仅用于名词前)目前的，现存的单句语法填空/完成句子①You can’t imagine what difficulty they have existing on the money he’s earning.②Ever since a long time ago, there__have__existed (存在着) different opinions among scientists on how the universe first existed/came__into__existence (存在)．[佳句背诵] There exists a good way to solve the existing problem in geography.有一个解决现存的地理问题的好办法。

[名师指津] exist没有被动语态，也不能用于进行时态。

2.puzzle n．谜；难题vt.& vi.(使)迷惑；(使)为难(1)a puzzle to sb一件让某人感到困惑的事情be in a puzzle about＝be puzzled about 对……迷惑不解(2)puzzle about 苦思冥想；绞尽脑汁(3)puzzling adj. 令人困惑的puzzled adj. 感到困惑的单句语法填空/句型转换①Where the missing plane has gone still remains a puzzle to us.②What puzzled the firemen was the cause of the fire.→The firemen were__in__a__puzzle__about the cause of the fire.(puzzle n．)→The firemen were__puzzled__about the cause of the fire.(puzzled)[佳句背诵] These scientists have been puzzling about how to solve the environmental problem.这些科学家一直苦思如何解决这个环境问题。

3.harmful adj.有害的；伤害的(1)be harmful to对……有害(2)harm n．& vt. 伤害，损害do sb harm (＝do harm to sb) 伤害某人；对某人有害there is no harm in doing sth 做某事没有害处单句语法填空/句型转换①Drinking too much does harm to your health.②They don’t usually employ untrained workers, but it doesn’t do any harm to try your fortune.→They don’t usually employ untrained workers, but there’s__no__harm__in__trying your fortune.[佳句背诵] The majority of people believe smoking is harmful to health.大多数人相信吸烟对身体有害。

4.unlike prep.和……不同；不像adj.[作表语]不相似；不同(1)like作动词意为“喜欢”，作介词意为“像”(2)dislike是动词，意为“不喜欢”(3)unlike是介词，意为“与……不像，不同，相反”(4)alike可以作形容词或者副词，意为“一样的，相同的”完成句子①My mother dislikes__seeing__you__with__me__together(我母亲不喜欢看到你我在一起)．②Though John and Andrew look__exactly__alike(看上去一模一样), they act quite differently.[佳句背诵] It’s u nlike him to be late; he’s usually on time. 他不是会迟到的那种人，他通常很准时。

5.pull n．& vt.拉(力)；拖；牵引力pull off脱(衣、帽等)pull down 拆毁；摧毁pull out 离站；抽出，取出pull in (火车)进站单句语法填空/完成句子①When all passengers were on board, the train pulled out of the station.②They pulled__down__my__old__house(拆除了我的旧房子) and built five new ones.③She pulled__off__her__raincoat(脱掉雨衣) before entering the room.6.in time及时；终于；迟早in time for...刚好赶上……in time to do sth 及时做某事in no time 立刻，马上on time 准时单句语法填空①We arrived in the summer, just in time to__enjoy (enjoy) the midnight sun.②If you hurry, you’ll be in time for the bus.[佳句背诵] As a proverb goes, “Where there’s a will, there’s a way.” Our efforts will pay off in time.正如一句谚语所说，“有志者，事竟成”，我们的努力迟早会有所回报。

7.prevent...from阻止；制止prevent/stop...(from) doing sth＝keep...from doing sth阻止……做某事keep...doing sth 使……一直做某事protect...from... 保护……不受……侵袭；挡住；防御单句语法填空/句型转换①To keep warm, he kept the fire burning(burn) all the night.②It is high time that we did something to keep the environment from being polluted.→It is high time that we did something to prevent/stop the environment (from) being polluted．8.cheer up(使)高兴；(使)振奋；感到高兴；感到振奋cheer sb up使某人振作起来cheer sb on (比赛中)以喝彩声鼓励；为某人加油单句语法填空/完成句子①They gathered round the swimming pool and cheered her on．②When I’m feeling sad, my mother always tells__me__funny__stories__to__cheer__me__up (给我讲有趣的故事让我高兴起来)．9.in one’s turn轮到某人；接着in turn依次；轮流；反之；相应地by turns 轮流；交替地take turns to do sth 轮流做某事It is one’s turn to do sth 轮到某人做某事单句语法填空①Now that we have finished designing, the company, in turn, should do the constructing work.②I think it’s my turn to__drive (drive) the kids to school this week.③They had to take turns to__look (look) after the patients.10.This produced a chain reaction, which made__it__possible__for__life__to__develop.这产生了一个连锁反应，使得生命的发展成为可能。