Unit 4 Inventions-【高效课堂】2026-2027学年八年级上册英语同步导学案（沪教版·新教材）

31 Unit 4 Inventions Section 1 Experiencing and understanding language Reading 久◆基础闯关 One of the most famous tennis players 课后现固·4级 is Roger Federer. I.根据汉语或首字母提示完成单词。 12.毫无疑问，一颗诚实的心对交朋友很重要。 1.Because of the new (技巧)，they an honest heart is could spend less time getting back. important to make friends 2.When you are in the park,don't p he13.我认为你不应该总是依靠父母。 leaves off the flowers and trees I don't think you should always 3.A it's a public holiday today,some your parents. doctors and nurses in our city are still on duty. 14.明天的校会将在大厅举行。 4.Good grades always take time and hard work. The school meeting will take in the There is no easy p to success. hall tomorrow. 5.Many people believe that the invention of the 15.在现代社会，人类活动每天都会产生大量的 (was a turning point in human 垃圾和废物。 history. In modern society human activities produce Ⅱ.从方框中选词并用其适当形式填空。 rubbish and wastes every attach center balloon international doubt day. 6.We never that our teachers will help 人能九提升 us whenever we meet problems. 课后现固·B级 7.Shaanxi is in China and you can see V.任务型阅读：阅读下面的语篇材料，根据所读 pandas there. 内容，完成下列各题。 8.We see some rising into the air at There are many inventions that have changed the opening of our new library people's lives a lot.The following are examples. 9.We can too much importance to X-rays were discovered in 1895 by a German protecting water resources. professor,Wihelm Roentgen.People all over the 10.You can find lots of national and world were amazed by his invention,the X-ray news in the newspaper every day. machine.This invention was so important that Ⅲ.根据所给汉语意思，用单词或短语完成下列 Roentgen won the first Nobel Prize for Physics in 英文句子。 1901. 11.罗杰·费德勒是有史以来最著名的网球运动 The telephone was invented by Alexander 员之一。 Graham Bell,a doctor and speech teacher.The first 32 phone call was made by Bell in 1876.He got acid V.短文填空：用方框中所给单词的适当形式填 (on his pants by accident and wanted his 空，使短文完整正确。（每个单词限用一次， partner,Thomas Watson,to help him.The first words 每空限填一个单词。) spoken on the telephone were "Mr.Watson,come world fall where without take here！I need you!'” century drink nation late discover The television was invented in 1924 by John Did you know that tea,the most popular drink Logie Baird,a Scottish inventor.Baird's television in the world after water )was invented by certainly didn't look like a television today!accident?Many people believe that tea was first Electronic televisions like the ones we have today21 nearly 5,000 years ago.It is said were invented by Vladimir Zworykin in the 1920s in that a Chinese ruler called Shen Nong was the first the United States. to 22. tea as a drink.One day Shen The first computer was built in 1946 by two Nong was boiling drinking water over an open fire. American engineers,J.Presper Eckert and John W. Some leaves from a tea plant 23. into the Mauchly.It was developed for the army,and it was water and remained there for some time.It produced so large that it took up the whole room!Later,in a nice smell so he tasted the brown water.It was l97l,the“microchip”was invented,.and small quite delicious,and so,one of the 24. home computers were first produced for personal favorite drinks was invented. use.Today computers are involved in almost A few thousand years 25. Lu Yu, everything we do and are found almost everywhere "the sage of tea",mentioned Shen Nong in his book we go. Cha Jing.The book describes how tea plants were 16.When did a German professor discover X-rays? grown and used to make tea.It also discusses He discovered X-rays 26. the finest tea leaves were produced 17.Who won the first Nobel Prize for Physics? and what kinds of water was used. won the first Nobel It is believed that tea was brought to Korea and Prize for Physics. Japan during the 6th and 7th 27. In 18.Why did Bell make a call to his partner,Thomas England,tea didn't appear until around 1660,but in Watson? less than 100 years,it had become the Because he wanted to 28. drink.The tea trade from China to Western countries 29. place in the 19th 19.What did Vladimir Zworykin invent in the century.This helps to spread the popularity of tea 1920s? and the tea plant to more places around the world. He invented in the Even though many people now know about tea 1920s. culture,the Chinese are 30. doubt the 20.What was the first computer developed for? ones who best understand the nature of tea. It was developed for 33 Listening I.听选答案 B.An inventor. 听力扫一扫 第一节：听下面5段对话，每段对话后有一个 C.An engineer. 问题，读两遍。请根据每段对话的内容和后面的 听第7段材料，回答第8至10小题。 问题，从所给的三个选项中选出最恰当的一项。 )8.How many inventions do they talk about? )1.A.A student A.Two. B.Three. C.Four. B.A teacher. )9.What was invented in the late 18th C.A scientist. century )2.A.For taking photos. A.The bus. B.For washing clothes. B.The bike. C.For washing dishes. C.The umbrella. ( )3.A.In1902. )10.How will Mike go home? B.In1952. A.By bike. C.In1982. B.Take the No.11 bus. )4.A.For three years. C.Take the No.22 bus. B.For two years. Ⅱ.听填信息（共5小题，计10分） C.For one year. 本题你将听到一段独白，读两遍。请根据独 白内容，用所听到的单词或短语完成下列各题。 )5.A.In Germany. (每空不超过三个单词。)》 B.In America. 11.The writer thinks is the most C.In China. useful invention. 第二节：听下面两段材料包括一篇独白和一 12.Thomas Edison was a great 段对话，每段材料后有几道小题。请根据所听材 料的内容，从题目给出的三个选项中选出问题的 13.Thomas Edison was in school for 正确答案。每段材料读两遍。 听第6段材料，回答第6、7小题。 14.Thomas Edison was always trying out )6.What was the TV play about? when he was a child. A.Ancient history. 15.Thomas Edison built at the B.Ancient inventions. age of ten. C.Ancient Chinese. ()7.What does the girl want to be? A.A pianist. 34 Section 2 Exploring and applying rules Grammar ◎语法精讲 4.-Jim,do you know who lives far) 1.形容词和副词的比较等级的不规则变化 in our class? 原级 比较级 最高级 -I think Kate does. good/well better best 5.Hope for the good),but plan for the bad/badly worse worst (bad). far farther/further farthest/furthest 6.Colin felt much (bad)this morning, much/many more most little less least so he decided to see a doctor 2.表示比较的句型 7.I can't speak English as well)as Sally,but I am good at Chinese. 用法 例句 “as+原级+as”表示“与 8.The result will be much (bad)unless … 样…”，在否定句 ●Lucy is not so tall as the problem is solved. 中用“not so/as+原级+Liy.露西不如莉莉高。 9.Mine flew than Jenny's airplane,but as”结构 Brian's flew the far) ●My house is twice as “倍数+as+原级+as”表large as my brother's.我 10.Tom practices basketball every day,and he 示“是…的…倍” 的房子是我哥哥房子的 becomes good)at it than before. 两倍大。 Ⅱ.根据所给汉语意思，用单词或短语完成下列 双方比较，表示一方超过另 ●China is larger than 英文句子。 一方时，用“比较级+han” Italy.中国比意大利大。 结构 11.数学和物理一样重要。 ● Our country Maths is physics. “比较级+and+比较级” becoming stronger and 12.第一中学是这个镇上最好的学校。 表示“越来越…” stronger.我们的国家正 No.1 High School is school in this 变得越来越强大。 “the+比较级，he+比较 town. ·The more,the better 级”表示“越…，就越 13.这本新的科学书不像旧的那本那么有趣。 多多益善。 The new science book is ◎语法专练 the old one. I·用括号中所给单词的适当形式填空。 14.109.9FM播放的音乐最差。这些歌总是很无 1.(中考·云南改编)一Which kind of movies do 聊，而且太吵了。 you prefer,action movies or comedies? 109.9 FM plays music.The -I like action movies well). songs are always boring and too loud. 2.You can visit our website for (ar)15.我们越努力，我们就越好。 information. The more hard-working we are, 3.5G technology can help the smartphones provide we will be. many)functions than before. 35 Section 3 Expressing and communicating ideas Speaking Writing I.根据句意及汉语提示完成单词。 A:Which one do you think is more useful,the car 1.Don't forget to keep a safe social or the telephone? (距离)in public places. B:14. It can 2.A butterfly has four (翅膀)but they take us anywhere we want to go. are different in shapes. A:I agree with you.Do you want to buy a car? 3.I can't find my notebook (在任何 B:15 .Because 地方). it's convenient for me to go to work. 4.The price of (汽油)is not as low as V.书面表达。 that of last year 假如你就读于一所国际学校，酷爱发明。在 5.You can get (益处)from different 你校的科技周活动中你想向同学们介绍你的一 项新发明。请根据下面的提示准备一份英语发 forms of exercise such as swimming,running and 言稿。 mountain climbing. 提示： Ⅱ.朗读下列句子，并注意句子的升调。 (1)What's it and when was it invented? 6.Do you want to visit the yellow river? (2)What's it used for? 7.-Is this your classroom? (3)What's it like? -Yes,it is. (4)How does it work? 8.-Does he have a ping-pong bat? (5)How much is it? -Yes,he does. 写作要求： 9.-Is that your teacher? (1)必须包含所有要点，可适当发挥； -No,she isn't. (2)词数70左右（开头已给出，不计人总词 10.-Does your mother like watching TV? 数)。 -No.She likes seeing a film. May I have your attention,please?I'd like to Ⅲ.补全对话。根据下面对话中的情境，在每个introduce my new invention to you. 空白处填入一个适当的语句，使对话恢复完 整。 A:Hello,Bob!May I ask you some questions? B:Sure. A:11. B:The telephone was invented in 1876. A:12 B:Yes,it was invented before the car. A:13. B:Well,it's used for getting in touch with each other. 36 Section 4 Extending and developing competencies Focusing on culture ◆基础闻美 13.请在糖和黄油的混合物里加一个鸡蛋。 课后现固·A级 Please add an egg to sugar I.根据汉语或首字母提示完成单词。 and butter. 1.This kind of machine is made of (金 14.他太累了，因为他昨晚没能入睡。 属) He is tired because he couldn't 2.Don't p the bell so hard,or you'll break last night. it! 15.我发现如果我们不吃早餐，很难专注于我们 3.Sandy is careful enough to n small 的工作或学习。 changes around her. I find it hard to our work or 4.The movable (活字)was invented between 1041 and 1048 AD studies if we don't eat breakfast. 5.Three fourths of the (表面)ofhe 孔能力提升 earth is covered with water. 课后巩固·B级 Ⅱ.用括号中所给单词的适当形式填空。 V.完形填空。 6.The notice says we can't touch these The umbrella is a great invention.But do you piece)of art. know who invented the umbrella?There are many 7.She only has one (move）finger on different opinions 16 this question among her right hand. countries around the world. 8.Lucy taught she)how to play the Some people say that the people of ancient guitar during the summer holiday. Egypt invented the umbrella.Some people believe 9.More than eight million books were that the Romans invented it.In China,it is 17 within fifty years after the invention of the that Lu Ban's wife invented the umbrella.There is press.(print) even an ancient story about that. 10.His visit to America greatly Lu Ban was the most famous craftsman in improve )the relationship between two ancient China.One day,he and his wife were taking countries. a walk and enjoying the 18 of the West Lake. Ⅲ.根据所给汉语意思，用单词或短语完成下列 Suddenly,it began to rain 19.Both of them got 英文句子。 11.你应该把冰箱里的牛奶加热。 wet when they got back home.His wife said,"It will You should the milk in the fridge. be wonderful if there is something to protect us from 12.玛丽上学要迟到了。让我们叫醒她吧。 the rain 20 we walk by the West Lake in the Mary will be late for school.Let's future.” Then Lu Ban answered,"That is easy.I 21 37 many pavilions()there."His wife said,"It is which are paper,gunpowder,the compass and a good idea.However,it is inconvenient because the printing,26 pavilion is not movable.Is it possible to make a The invention of paper came in China around movable pavilion that can always follow us?"They 105 AD.27.The great thing about Cai Lun's thought for 22 long time but had no great idea.invention was that his paper was good to write on, Another day,his wife saw some kids 23 in cheap,light and easy to carry. the rain.And each kid was 24 a big leaf above The second great invention,printing,goes the head to protect themselves from getting wet.She closely with paper.Building on other printing got 25 from that and the next day,she made the technology,Bi Sheng invented movable type printing first umbrella in ancient China.It was just like the around 1040.28. Today almost everyone in leaf. the world uses printing.People can use it to print )16.A.to0 B.about C.in D.out newspapers,magazines and books. ( )17.A.saying B.sayed The third great Chinese invention is C.said D.says gunpowder.Gunpowder was invented in the Tang )18.A.weather B.water Dynasty.Before its invention,people couldn't do C.food D.beauty something like building mountain tunnels () )19.A.hardly B.strongly 29 C.heavily D.powerfully The compass was invented in the Spring and )20.A.when B.which Autumn Period.The circular center means Heaven, C.what D.that and the square plate means Earth.30 The ( )21.A.will build B.built spread of the compass to Europe opened the oceans C.have built D.build of the world to travel and led to the discovery of the )22.A.the B.a C.an D./ New World. ( )23.A.played B.play A.The inventor of paper is Cai Lun. C.are playing D.playing B Nowadays people use it to break rocks into )24.A.supporting B.holding pieces. C.sticking D.burning C.at that time few people thought it necessary to )25.A.industry B.iron record daily things. C.instrument D.inspiration D.are traditionally called the Four Great Inventions V.根据短文内容，从短文后的选项中选出能填 in China. 入空白处的最佳选项。选项中有两项为多余 E.The hand of the spoon points south. 选项。 F And now it is still impossible to build tunnels. Over thousands of years,China has produced a G.Before its invention,people copied down things large number of inventions.And the four things, by handwriting. 38 Cross-curricular connection 阅读理解。 ( )1.The underlined word“lucrative”in The growth in skyscrapers(摩天大楼) Paragraph 1 means in worldwide,most of which have large glass windows, Chinese. has led to a great need for window washers.Though A.赚钱的 B.出色的 the job,which offers workers as much as $35 an C.安全的 D.优秀的 hour,can be lucrative,many people are afraid to )2.Paragraph 2 mainly tells us take it,as accidents are quite common.Now,the A.where Ozmo can do its job skillfully dangerous chore may soon be done by Ozmo,a B.how Ozmo avoids unexpected events smart window cleaning robot,with humans C.how Ozmo works to clean the glass supervising(监督)on the ground. smartly Much like humans,Ozmo,hanging off the D.when Ozmo works sides of the building,uses its arms and brushes to )3.Ozmo will not take the place of human clean the dust on the glass.A 3D map of the workers because building programmed into its system allows the robot A.human workers need to control and to skillfully move up and down.Computer vision and supervise the robot from below touch sensors enable it to move out of the way in case of unexpected events,such as the sudden B.it often misses the dust collected on window corners opening of a window.And the robot will self-correct and move around in order not to break a window. C.it uses environmentally friendly materials Unlike other window washers,the robot cleaner in cleaning does not require soap to clean the glass.Instead,it D.human workers don't need to control uses purified water(纯净水)and a process called and supervise the robot from below reverse osmosis(逆渗透)to do the job.Itis )4.To finish the task of cleaning the windows environmentally friendly. of a 40-story glass building,Ozmo spends While it takes three human cleaners 480 hours hours less than a human cleaner. each to clean the windows of a 40-story glass A.560B.400C.1360D.800 building,the robot will complete the task in just 80 )5.What can we know about Ozmo from the hours.However,Ozmo will not take the place of passage? human workers,only making their jobs safer. A.Ozmo can do the cleaning job better Human workers will control the robot from below. than human workers. Whether Ozmo,which is still being tested, B.Ozmo can make human workers do does as good a job as humans remains to be seen. their jobs more safely. Past efforts to use a robot to do this dangerous job C.As an intelligent window cleaning robot, have not been successful,because the machines do Ozmo is not successful. not have the same eyes as humans and often miss D.As an intelligent window cleaning the dust collected on window corners. robot,Ozmo is not useful. 39 Checking your I progress I.完形填空。 ( )7.A.questioned B.punished In a colorful world of engines,there lived a C.protected D.encouraged tiny blue engine.It was small but it had big 1 ! )8.A.regret B.effort One day,the engines were given the most important C.interest D.shame task of the year:To take 2 to children who live )9.A.strictly B.lightly on the other side of the mountain. C.successfully D.crazily “It'stoo3.We can't do it,”said all the )10.A.deal with B.depend on powerful,bigger engines.They didn't think they could C.believe in D.mess up be able to do it.But the little engine was 4.It Ⅱ.任务型阅读：阅读下面的语篇材料，根据所读 trusted itself and knew it could do it.It took a deep 内容，完成下列各题。 breath and took a5_to the front,“I can do it.” For students,homework is part of their daily All the big engines started making fun of it.But it life.Starting from the early years,teachers will didn't 6 always give them something to do after school.But The little blue engine set out and with every chug(发出嘎嚓声)，it_7 itself,“I think I can, have you ever wondered who invented homework and I think I can."It didn't stop and with great 8,it why? reached the top of the big mountain.The little blue A deep search of homework history dates back engine took all the toys to the children 9 and it to Ancient Rome.It's said that around the 1st was only able to do this because it believed in( Century AD,a young teacher named Pliny,invented itself! homework.Pliny asked his students to do at-home If you are strong-willed,you can 10 any activities to improve their speaking skills.Another challenge that comes your way!So with a positive person who played an important role in the invention mindset,keep telling yourself,"I think I can. of homework is Horace Mann.He brought the idea of ( )1.A.risks B.dreams homework from Germany to America in the 19th C.mountains D.mistakes century.Later,the idea spread to other places of the )2.A.toys B.engines world.He was thought to be "Father of Modern C.messages D.cookies Homework” )3.A.colorful B.tiny Homework was once used as a punishment for C.important D.hard students.As education develops,people begin to )4.A.nervous B.fun make good use of homework as a learning tool. C.lazy D.opposite )5.A.bite B.view Usually,when students go back home from school, C.step D.photo they might quickly forget what their teachers have )6.A.care B.breathe taught in class.So,homework is used to improve C.start D.arrive learning.Another purpose of homework is to 40 encourage the students to manage their own world,it is the results of thousands of years of afterschool time. Besides,in order to get better human invention. scores,one must have proper knowledge about the First,came the invention of writing, subjects.The homework encourages students to 16 about 5,500 years ago.With practice the lessons. writing,people did not have to remember everything Although no one exactly looks forward to doing in their heads.They could communicate with people homework,it is a necessary and important task that that they never 17. _and share their you can't refuse.So face it bravely and get it done knowledge with future generations. efficiently(高效地). Later the Greeks were well done for their 11.When did Pliny invent homework? literature(文学)and science,but their“books” Pliny invented homework looked very different 18. the books of today.They were called scrolls ()They were 12.Where did Horace Mann get the idea of difficult to use and took a lot of space in a library. homework? About 2,000 years ago,books with lots of pages Horace Mann got the idea of homework were 19. For more than a thousand years,the pages of 13.Why is homework used to improve learning? books were made from animals'kin.That changed in Because the students might ! the thirteenth century,when Europeans learned about a very 20. Chinese invention: 14.What must one have in order to get better paper. scores But the biggest change for books in Europe One must have came in 1439,when Johannes Gutenberg invented the 21. press.Before that,books in 15.How should students deal with homework? Europe were copied by hand,so they were very Students should expensive.Many more people could afford the books 22, were produced on a printing press. Ⅲ.短文填空：用方框中所给单词的适当形式填 These days it is difficult to imagine a world 空，使短文完整正确。（每个单词限用一次，23 books.But human invention does 每空限填一个单词。) not stop.Every year,more 24. are useful that probable print or bought as e-books and read on a screen. see without from invent story Will anyone turn the pages of a traditional book Next time you hold a book in your hands,stop in the future,25. will books,like scrolls, and think.Like most other things in the modern soon disappear?15.trying its best to hold environmentally-friendly Asian Games 16.messages 17.probably 18.your 19.received 20.create 21.when 22.but 23.totally 24.disadvantage 25.communicating Unit 4 Inventions Section 1 Experiencing and understanding language Reading 1.technique 2.pull 3.Although 4.path 5.wheel 6.doubt 7.central 8.balloons 9.attach 10.international 11.of all time 12.Without doubt 13.depend on 14.place 15.large amounts of 16.in 1895 17.Wihelm Roentgen 18.ask Thomas Watson for help 19.electronic televisions 20.the army 21.drunk 22.discover 23.fell 24.world's 25.later 26.where 27.centuries 28.national 29.took 30.without Listening 1-5 ACABC 6-10 BBABC 11.the computer 12.American inventor 13.three months 14.new ideas 15.a science lab Section 2 Exploring and applying rules Grammar 1.better 2.further 3.more 4.farthest 5.best worst 6.worse 7.well 8.worse 9.farther farthest 10.better 11.as important as 12.the best 13.not as interesting as 14.the worst 15.the better Section 3 Expressing and communicating ideas Speaking Writing 1.distance 2.wings 3.anywhere 4.petrol 5.benefit 11.When was the telephone invented 12.Was it invented before the car 13.What is it used for 14.I think the car is more useful 15.Yes,I do Section 4 Extending and developing competencies Focusing on culture 1.metal 2.press 3.notice 4.type 5.surface 6.pieces 7.movable 8.herself 9.printed printing 10.improved 11.heat up 12.wake her up 13.the mixture of 14.fall asleep 15.focus on 16-20 BCDCA 21-25 ABDBD 26-30 DAGBE Cross-curricular connection 1-5 ACACB Checking your progress 1-5 BADDC 6-10 ADBCA 11.around the 1st Century AD 12.in Germany 124 13.quickly forget what their teachers have taught in class 14.proper knowledge about the subjects 15.face it bravely and get it done efficiently 16.probably 17.saw 18.from 19.invented 20.useful 21.printing 22.that 23.without 24.stories 25.or Unit 5 Going on an exchange trip Section 1 Experiencing and understanding language Reading 1.chopsticks 2.exchange 3.nervous 4.tour 5.yet 6.definitely 7.amazing 8.grateful 9.interest 10.unforgettable 11.appeared 12.Chinese 13.was 14.different 15.making 16.that 17.herself 18.months 19.more 20.truly Listening 1-5 AABAC 6-10 ABACA 11.one year 12.twice 13.tomorrow morning 14.famous historical place 15.glad Section 2 Exploring and applying rules Grammar 1.have worked 2.has taught 3.have seen 4.have learned 5.has been 6.has won 7.have grown 8.have cleaned 9.have made 10.haven't found 11.have improved 12.have chosen 13.have left 14.has excited 15.has discovered Section 3 Expressing and communicating ideas Speaking Writing 1.independent 2.content 3.benefit 4.expression 5.feeling 11.How did you get there 12.How long did you stay there 13.Who did you go there with 14.What did you do there 15.It was great Section 4 Extending and developing competencies Focusing on culture 1.situation 2.homesick 3.anxious 4.honeymoon 5.accept 6.confused 7.lonely 8.foreigners 9.unfamiliar 10.to choose 11.culture shock 12.deal with 13.feel at home 14.expect 15.no longer 16-20 BCADA 21 -25 BACBD 26.On 27.excited 28.adaptation 29.because 30.making 31.known 32.importance 33.truly 34.achievement 35.expected Cross-curricular connection 1-4 BDCB 5-9 GBEDF 10.given 11.carefully 12.them 13.earliest 14.into 15.stories 16.creative 17.who 18.improve 19.smiling —125— Checking your progress 1-5 CDCCB 6-10 CBACD 11 -13 ADB 14.fine art,tasty food and beautiful scenery 15.over 66 million 16.Da Vinci 17.nine months 18.Bread Unit 6 Wisdom counts Section 1 Experiencing and understanding language Reading 1.soldier 2.author 3.enter 4.except 5.empty 6.secretly 7.located 8.victories 9.success 10.hid 11.midnight 12.make jokes about 13.succeed in 14.took over 15.except for 16-20 CBADC 21 -25 ADBBD 26.musical 27.that 28.were 29.having 30.Suddenly 31.in 32.eating 33.head 34.educational 35.if Listening 1-5 BCBAC 6-10 ABACB 11.drinking water 12.tired 13.a leaf 14.bit 15.in return Section 2 Exploring and applying rules Grammar 1.visited 2.broke 3.have worked 4.failed 5.taught 6.have said 7.left 8.invented 9.have searched 10.won 11.has changed 12.chose 13.has dropped 14.has been 15.have made Section 3 Expressing and communicating ideas Speaking Writing 6.What are you watching 7.What movie is it 8.No,I haven't 9.You are right 10.Would you like to watch it with me Section 4 Extending and developing competencies Focusing on culture 1.Therefore 2.attack 3.fail 4.towards 5.within 6.making 7.beat 8.enemies 9.shouted 10.impossible 11.go on board 12.on the other side of 13.is full of 14.jealous of 15.fight against 16-20 ACBAD 21-25 ABBCB 26.took 27.eighteenth 28.centuries 29.to 30.unknown 31.caught 32.visitors 33.completely 34.made 35.but Cross-curricular connection 1-5 ACDAB 6-10 CBDAB 11-15 AGDBF 16.general 17.a promise is worth lots of gold 18.copper 19.thirty-five 20.the importance of honesty Checking your progress 1-5 ADACB 6.the father of China's nuclear submarine —126—