2019届一轮复习人教版选修八Unit2Cloning单元学案设计（22页word版）

2019届一轮复习人教版选修八Unit2Cloning单元学案设计（22页word版）

‎2019届一轮复习人教版选修八Unit 2Cloning单元学案设计 一 单元词汇句式搜索 一、写其形 ‎1.differ vi.　不同；相异 ‎2.exact adj. 精确的；准确的 ‎3.undertake vt. (undertook；undertaken)着手；从事；承担 ‎4.breakthrough n. 突破 ‎5.procedure n. 程序；步骤；手续 ‎6.cast vt. (cast，cast)扔；投；掷 ‎7.altogether adv. 总共；完全地 ‎8.correction n. 改正；纠正；修正 ‎9.object vi. 反对；不赞成 ‎10.objection n. 不赞成；反对；异议 ‎11.obtain vt. 获得；赢得 ‎12.attain vt. 获得；到达(水平、年龄、状况等)‎ ‎13.moral adj. 道德(上)的；伦理的 ‎14.forbid vt. (forbade，forbad；forbidden)禁止；不准 ‎15.accumulate vt.& vi. 积累；聚积 ‎16.compulsory adj. 必须做的；义务的；强迫的；‎ ‎ 强制的 ‎17.loaf n. 一条(面包)‎ ‎18.owe vt. 欠(账、钱、人情等)；归功于……‎ ‎19.shortly adv. 立刻；不久 ‎20.retire vi. 退休；离开 ‎21.bother vt. 打扰 ‎　　 vi. 操心 ‎　　 n. 烦扰 ‎22.assumption n. 假定；设想 ‎23.regulation n. 规则；规章；法规 ‎24.popularity n. 受人喜爱；流行 ‎25.strike vt.& vi. (struck，struck)打；撞击；罢工 n. 罢工 ‎26.vain adj. 虚荣的；自负的；徒劳的 ‎27.resist vt. 抵抗；对抗 ‎28.drawback n. 缺点；不利条件 ‎29.merely adv. 仅；只；不过 ‎30.decoration n. 装饰 ‎31.unable adj. 不能的；不会的 ‎32.hatch vt.& vi. 孵出；孵卵；孵化 ‎33.reasonable adj. 合情理的；讲道理的；公道的 二、知其意 ‎1.twin n. 双胞胎之一；孪生儿之一 ‎　adj. 成对的；成双的 ‎2.commercial adj. 商业的；贸易的 ‎3.straightforward adj. 简单的；直接的；坦率的 ‎4.complicated adj. 复杂的；难懂的 ‎5.carrier n. 携带者；搬运工；运输工具 ‎6.arbitrary adj. 任意的 ‎7.fate n. 命运；天命 ‎8.medium n. (pl media)媒介；手段；工具 ‎9.conservative adj. 保守的；守旧的 ‎10.constitution n. 宪法；章程 ‎11.opera n. 歌剧；歌剧团；歌剧院 ‎12.chorus n. 合唱；合唱队 ‎13.flour n. 面粉 ‎14.initial adj. 最初的；开始的 ‎15.feather n. 羽毛 ‎16.fairly adv. 公平地；相当地 ‎17.turkey n. 火鸡 ‎18.dye vt. 给……染色；染 n. 染色剂 ‎19.claw n. 爪；脚爪 ‎20.adore vt. 崇拜；爱慕；喜爱 ‎1.cast__down 使失望；使沮丧 ‎2.the__media 大众传播媒体(如电视、报纸等)‎ ‎3.in__favour__of 赞成；支持 ‎4.side__road 旁路；支线；岔道 ‎5.(be)bound__to__(do)... 一定或注定(做)……‎ ‎6.strike...into__one’s__heart 　使……刻骨铭心 ‎7.from__time__to__time 不时；偶尔 ‎8.bring__back__to__life 使复生；使复活 ‎9.in__vain 白费力气；枉费心机 ‎10.in__good/poor__condition 状况很好(坏)；情况很好(坏)‎ ‎1.Cloning plants is straightforward while__cloning__animals__is__very complicated.‎ 克隆植物简单，而克隆动物非常复杂。‎ ‎2.Then__came__the__disturbing__news__that Dolly had become seriously ill.‎ 接着传来了多莉病重的坏消息。‎ ‎3.What__do__you__think is the writer’s point of view in this reading passage?‎ 你认为这篇文章中作者的观点是什么？‎ ‎4.The__advantage__is__that if there is a new illness some of these animals may die，but others will survive and pass on the ability to resist ‎ that disease to the next generation.‎ 其优点是，如果发生了某种新的疾病，这类动物中的一些可能会死掉，但是另外一些却能存活下来，并且把这种免疫力传给下一代。‎ ‎5.Based__on__what__we__know__now，you cannot clone animals that have been extinct longer than 10，000 years.‎ 就我们现在所知道的而言，克隆绝种超过一万年的动物是不可能的。‎ 二 单元知识综合运用 Ⅰ.阅读理解 A Patients in the early stages of Alzheimer's disease often struggle to remember recently learned information, meaning they forget things like important appointments or where they left their keys. But it seems that these memories are not lost. They are still filed away in the brain somewhere; they just can't be easily accessed.‎ Now, researchers at MIT have developed a means of getting back memories in mice suffering from Alzheimer's. The method relies on a technique that uses light to control genetically modified neurons (转基因神经元). Currently it is too early to be used in human trials as it involves inserting light emitting(发光) equipment into the subjects' brains, but the same principles still apply, the researchers said.‎ ‎“The important point is that this is evidence of the concept. That is, even if a memory seems to be gone, it is still there. It's a matter of how to get it back，”said the senior researcher Susumu Tonegawa.‎ The team took two groups of mice, one genetically engineered to develop Alzheimer's and one healthy. They then placed them into a room and gave them a mild electric shock.All of the mice showed fear when put back an hour later. When placed in the room a third time several days later, the Alzheimer's mice acted normally. They had forgotten the shock.‎ The researchers were then able to bring back the memory of the shock by activating(激活) the cells in which the memories were stored. Even when the mice were put into an unfamiliar room, they showed fear when the cells associated with the shock were activated.‎ ‎“Shortterm memories seem to be normal in order of hours.But for longterm memories, these earlyAlzheimer's mice seem to be damaged，”said the lead researcher Dheeraj Roy.“Directly activating the cells that we believe are holding the memory helps them get it back. This suggests that it is indeed an access problem to the information, not that they are unable to learn or store this memory.”‎ ‎[语篇解读]　本文主要介绍了利用光控制转基因神经元使早老性痴呆病患者恢复记忆的技术。‎ ‎1．What can we learn about the researchers at MIT?‎ A．They are the pioneers of brain research.‎ B．They have used the method in human trials.‎ C．They can cure Alzheimer's using the new method.‎ D．They can get back memories in mice with Alzheimer's.‎ 解析：细节理解题。根据第二段的第一句“Now，researchers at MIT have developed a means of getting back memories in mice suffering from Alzheimer's.”可知，他们能够使患有早老性痴呆病的老鼠恢复记忆。‎ 答案：D ‎2．Why did the Alzheimer's mice behave normally the third time?‎ A．They failed to remember the electric shock.‎ B．They were accustomed to the situation.‎ C．They managed to overcome the fear.‎ D．They activated the association automatically.‎ 解析：细节理解题。根据第四段的“the Alzheimer's mice acted normally.They had forgotten the shock.”可知，这些老鼠忘记了受到的电击。‎ 答案：A ‎3．For longterm memories, the earlyAlzheimer's mice .‎ A．can transform their brain cells B．can't learn new tricks well C．can easily get back their memories D．can't access the information stored 解析：推理判断题。根据最后一段的“But for longterm memories，these earlyAlzheimer's mice seem to be damaged”和“Directly activating...this memory”可知，对于长期记忆来说，这些处于早老性痴呆病早期的老鼠因为(脑细胞)已经被损害，不能获得这种已经储存的信息。‎ 答案：D ‎4．The main purpose of the text is to .‎ A．introduce a method of a research B．report the latest discovery about a disease C．give advice on how to improve memories D．explain how a brain stores information 解析：作者意图题。通读全文可知，本文的主要目的是报道关于早老性痴呆病的最新发现。‎ 答案：B B If you followed the 2016 Olympic Games, you may have noticed that several athletes, including US swimmer Michael Phelps, had circular bruises on their bodies. These bruises were the result of “cupping (拔火罐) therapy”， a traditional Chinese medicinal practice that has been around for more than 2,000 years.‎ Many athletes say that they have benefited from the therapy. Phelps used the therapy in the fall of 2014 and has used it about twice a week since, reported ABC News. Another US swimmer, Dana Vollmer, also believes that “it really helps with blood flow”．‎ However, some have said that the supposed health effects result from people's feeling that the treatment works, rather than any physical effect of the treatment.‎ To figure out cupping therapy has any physical effect, last year researchers from Germany carried out a test in which a false treatment was provided.‎ In the study, the same type of cups was used in the real treatment and the false treatment. But in the false treatment，the cups had a hole at the top so that they couldn't create the proper suction (吸力)．‎ The tested patients, who suffered from a disorder that caused a lot of pain, were told that they would receive either traditional cupping or “soft cupping”. But they were not informed that the socalled “soft cupping” was a false treatment.‎ It turned out that most patients correctly guessed which kind of cupping they had received. In both groups, patients also e xperienced about the same reductions in pain. “The results suggest the effects of cupping therapy might come from factors that are not necessarily part of the treatment itself，” the researchers told the Live Science website.‎ The question of whether cupping therapy works still needs to be answered.“But because the treatment is relatively safe and it could be helpful for some people, the therapy can be used as part of a comprehensive treatment program involving other exercises, nutritional choices and lifestyle changing，”Dr Brent Bauer, director of the US Complementary and Integrative Medicine Program at Mayo Clinic, told Live Science.‎ ‎[语篇解读]　本文主要介绍了中国传统医疗方式拔火罐的实际疗效问题。‎ ‎5．Why is Michael Phelps mentioned in the passage?‎ A．To give athletes a new way to swim faster.‎ B．To provide athletes with a new way of treatment.‎ C．To introduce the topic on cupping therapy.‎ D．To show swimmers suffer from disorders.‎ 解析：推理判断题。根据文章前两段的整体内容可推知，提到运动员菲尔普斯是为了导入文章的话题，即拔火罐疗法是否有效，故选C。‎ 答案：C ‎6．The purpose of the test by researchers from Germany was to .‎ A．promote the health effects of cupping therapy B．see whether cupping therapy has a physical effect C．compare traditional cupping with soft cupping D．compare cupping therapy's effects on different groups of people 解析：细节理解题。根据第四段整体内容可知，实验的目的是验证拔火罐是否真的有效。‎ 答案：B ‎7．What can be learned from the passage?‎ A．Different people need different types of cupping therapy.‎ B．The real treatment and false treatment almost have the same effects.‎ C．The results show that cupping therapy is not part of the treatment.‎ D．Cupping therapy is only effective when used with lifestyle changing.‎ 解析：细节理解题。根据倒数第二段的“In both groups，patients also experienced about the same reductions in pain.”可知，实验表明两种不同的拔火罐方法效果是一样的。‎ 答案：B ‎8．According to Dr Brent Bauer, cupping therapy .‎ A．is a fast and easy treatment for people to carry out B．is a newly invented way to cure some diseases C．needs a long period of time to take effect D．can be used together with other treatments 解析：细节理解题。根据最后一段中的“But because the treatment is relatively safe and it could be helpful for some people，the therapy can be used as part of a comprehensive treatment program involving other exercises，nutritional choices and lifestyle changing”可知，Dr Brent Bauer认为拔火罐可以和其他方法一起配合治疗。‎ 答案：D C Dear Alcohol，‎ You've been around forever. I can remember all the pain you've caused me.‎ Do you remember the night when you almost took my father's life? I do. He loves you. Sometimes I think he loves you more than he loves me. He's addicted to you and to the way you promise to rid him of his problems only to cause more of them. You just sat back and laughed as his car went turning through the street, crashing into two other cars. He wasn't the only one badly hurt by you that night.‎ Do you remember the night of my first high school party? My friends were intrigued by you. They treated you as if they were never going to see you again, drinking all of you that they could. I spent two hours that night helping my friends who had fallen head over heels for you. “I'm so embarrassed，” they said as I held their hair back so that they could throw up. “I'm sorry，” they said when I called taxis for them, walking them out and paying the driver in advance. “This won't happen again，” they said as they were sent to the hospital to have their stomachs pumped. Two 15yearold girls slept in hospital beds that night due to you.‎ Do you remember the night when you took advantage of my 17yearold neighbor who had to drive to pick up his sister from her dance lessons? Do you know how we all felt when he hit another car headon and killed two people in the other car? He died the next morning too. His sister walked home from her dance lesson, and passed police cars and a crowd of people gathering on the sidewalk just two blocks away from the dance studio. She didn't realize her brother was among them at all. She never saw him again. And it was all your fault.‎ I wish you'd walk out of my life forever. I don't want anything to do with you. Look at all the pain you've caused. Sure, you've made people happy too from time to time. But the damage you've caused in the lives of millions is not excusable. Stop attracting the people I love! Stop hurting me, please.‎ Sincerely，‎ Me ‎[语篇解读]　这篇文章是一封书信。作者用拟人化的手法，写信给酒，痛斥它给人们带来的伤害，以此劝诫人们远离酒。‎ ‎9．What did Alcohol do to the author's father that night?‎ A．It made him drunken and took his life away.‎ B．It made him kill two other people when driving.‎ C．It got him into a car accident and badly injured.‎ D．It got him into trouble and got his stomach pumped.‎ 解析：细节理解题。根据第二段最后两句可知答案为C项。‎ 答案：C ‎10．What does the underlined phrase “were intrigued by”probably mean in the letter?‎ A．Were interested in.　B．Were satisfied with.‎ C．Were familiar with. D．Were disappointed by.‎ 解析：词义猜测题。根据第三段第三句可以推断出作者的朋友对酒很感兴趣，故答案为A项。‎ 答案：A ‎11．What is the author's purpose in writing this letter?‎ A．To warn people not to drive after drinking.‎ B．To persuade people to get away from alcohol.‎ C．To tell people three sad stories about alcohol.‎ D．To warn people against the pain caused by alcohol.‎ 解析：作者意图题。从文章最后一段可知，作者写此信的目的是劝诫人们远离酒，故答案为B项。‎ 答案：B ‎12．How was the author feeling while writing his letter?‎ A．Shocked. B．Responsible.‎ C．Disappointed. D．Sorrowful.‎ 解析：推理判断题。文中讲述了饮酒造成的两次车祸，一次朋友饮酒后就医的故事，字里行间含着悲伤的(sorrowful)情绪，故答案为D项。‎ 答案：D D Two of the hardest things to accomplish in this world are to acquire wealth by honest effort and, having gained it, to learn how to use it properly. Recently I walked into the locker room of a rather wellknown golf club after finishing a round. It was in the late afternoon and most of the members had left for their homes. But a halfdozen or so men past middle age were still seated at tables talking aimlessly and drinking more than was good for them. These same men can be found there day after day, and, strangely enough，each one of these men had been a man of affairs and wealth，successful in business and respected in the community. If material prosperity were the chief necessity for happiness, then each one should have been happy. Yet, it seemed to me, something very important was missing, or else there would not have been the constant effort to escape the realities of life through Scotch and soda.They knew, each one of them, that their productivity had ceased (停止). When a fruit ‎ tree ceases to bear its fruit, it is dying. And it is even so with man.‎ What is the answer to a long and happy existence in this world of ours? I think I found it long ago in a passage from the book of Genesis which caught my eye while I was looking through my Bible.The words were few, but they became memorably impressed in my mind：“In the sweat of the face shall you eat the bread.”‎ To me, that has been a challenge from my earliest recollections (memories). In fact, the battle of life, of existence, is a challenge to everyone. The immortal words of St. Paul, too, have been and always will be a great inspiration to me. At the end of the road I want to be able to feel that I have fought a good fight, I have finished the course, I have kept the faith.‎ ‎[语篇解读]　本文为一篇议论文，题材为人生哲理类。文章开头首先提出世上最难实现的两件事是通过诚实劳动获得财富和获得财富后学会如何合理地使用财富。然后论述了人生的意义在于一息尚存，奋斗不已。‎ ‎13．Which of the following is indicated in the first paragraph?‎ A．Wealth results from honest effort.‎ B．The men seated at tables in the locker room are lost in the significance of life.‎ C．For some people，no way can be found to escape the realities of life other than Scotch and soda.‎ D．The men acquire wealth by planting fruit trees.‎ 解析：推理判断题。根据第一段中“Yet，it seemed to me，...through Scotch and soda.”可知，很多人借助酒来逃避现实，虚度人生，故选C项。‎ 答案：C ‎14．The underlined sentence “In the sweat of the face shall you eat the bread” means “ ”．‎ A．Bread tastes delicious when sweat pours off your face B．No pain，no gain C．Failure is the mother of success D．Bread comes from the sweat on your face 解析：词义猜测题。根据上下文可知，作者认为幸福而有意义的人生是通过奋斗获得成功，由此可猜测画线部分应突出努力付出和收获之间的关系，故选B项。‎ 答案：B ‎15．We learn from the passage that the author .‎ A．was a wealthy person in the community B．held a positive attitude towards an active life C．was fond of associating with celebrities (名人)‎ D．kept a secret of the reason why he was so impressed 解析：推理判断题。通读全文可知作者的生活态度是“一息尚存，奋斗不已”，故选B项。‎ 答案：B ‎16．What is implied in the passage by the writer?‎ A．To use wealth properly, eat, drink and be merry.‎ B．Where there is a will，there is a way.‎ C．As life is but like a dream，a man is like a fruit tree.‎ ‎ D．If you cease to struggle，you cease to live.‎ 解析：推理判断题。通读全文尤其是第一段结尾处的“When a fruit tree ceases...so with man.”可知，文中暗含了作者“一息尚存，奋斗不已”‎ 的生活态度，故选D项。‎ 答案：D Ⅱ.完形填空 A 14yearold Chinese boy overcame two of humankind's most dreaded fears — getting stuck in an elevator and getting homework done in a single night thanks to his quickwitted(反应敏捷的)character.‎ Sun Yixiao was on his way up last Tuesday evening after school when the lift suddenly stopped.A moment of 1 followed before the teenager decided to take 2 into his own hands and find a way out.Sun said he tried to pry(撬)the elevator door open，but 3 there could be a malfunction (机器故障)that would send the elevator 4 a free fall，he 5 the idea and instead 6 against the wall.He then pressed all the buttons in the hope of getting the elevator to work again，but in vain.Sun then pushed the “Stop” button to lock the elevator and make sure it wouldn't move. 7 a cellphone at hand，Sun tried 8 to get the attention of people outside，but no one responded 9 time passed by.‎ But the young boy didn't give up.‎ He slipped a note 10 the door with the message “People stuck inside；please ask the property management(物业)for help”and hoped someone would pick it up and act it on.After 11 all his options，the 12 kid decided to tend to his homework, not knowing how long it would take 13 someone found him.He took out his textbooks and 14 himself with his daily homework routine.Soon after he finished his duties，Sun heard loud voices coming from 15 .‎ ‎“There was a large crowd outside，including my teachers and other ‎ parents；people looked quite 16 ，”Sun said the moment he was rescued.He had been trapped for five hours by the help arrived.‎ On China's Twitterlike Weibo，many netizens 17 the boy's bravery and calmness in the face of such 18 .“The guy must have 19 the advantages and disadvantages of the situation：he had a great chance to survive an 20 elevator，but would have been doomed if he left homework undone，”joked @Zealshifang.‎ ‎[语篇解读]　本文主要讲述了中国14岁男孩儿孙轶潇在电梯出了故障后不仅没有惊慌失措，最后还把作业做完了的故事。‎ ‎1．A.panic　　　　　 B．excitement C．confusion D．depression 解析：与上文的“fears”呼应，主人公在电梯突然停止后，随之而来的是惊慌。panic“惊慌”；excitement“激动”；confusion“困惑”；depression“抑郁”。‎ 答案：A ‎2．A.materials B．substances C．matters D．events 解析：根据下文的“find a way out”可推知，主人公决定自己处理这种意外情况，与上文的“overcame”呼应。take matters into one's own hands固定搭配，意为“亲自处理某事”。‎ 答案：C ‎3．A.considering B．telling C．understanding D．ignoring 解析：根据语境可知，主人公试图撬电梯，但考虑到电梯出了故障可能会自由下坠。consider“考虑”。‎ 答案：A ‎4．A.onto B．into C．within D．from 解析：send sth.into sth.为固定词组，意为“使进入(某种状态)”，此处表示“使电梯自由下落”。‎ 答案：B ‎5．A.formed B．abandoned C．rejected D．accepted 解析：根据上文的“but”和下文的“instead”可推知，主人公放弃了自己之前的想法。abandon“抛弃，放弃”。‎ 答案：B ‎6．A.stood B．lay C．knelt D．leaned 解析：根据常识可知，在电梯出故障时，最好靠着电梯内墙。lean“靠在”。‎ 答案：D ‎7．A.With B．Without C．Through D．By 解析：根据语境可知，主人公手边没有手机，故用Without表示“没有”。‎ 答案：B ‎8．A.screaming B．crying C．whispering D．yelling 解析：根据空后的“to get the attention of people outside”可推知，主人公当时大声喊叫，希望有人能够听到，以便得到帮助。yell“叫喊”。‎ 答案：D ‎9．A.with B．as C．when D．while 解析：此处as引导时间状语从句，意为“随着”，表示“随着时间的流逝，没有人回应他”。‎ 答案：B ‎10．A.from B．by C．through D．across 解析：根据语境可知，困在电梯里的主人公通过电梯门缝塞出求救便条。through“穿过”，表示立体概念；across“横过”，表示平面概念。‎ 答案：C ‎11．A.exhausting B．wearing C．completing D．finishing 解析：根据语境可推知，主人公用尽了各种能想到的求救办法，都没有得到回应。exhaust“耗尽，使筋疲力尽”。‎ 答案：A ‎12．A.handsome B．terrified C．practical D．modest 解析：根据语境可知，主人公决定做作业，这说明他是一个务实的(practical)孩子。‎ 答案：C ‎13．A.before B．after C．when D．until 解析：此处表示“在有人发现他之前”，符合语境，故用before引导时间状语从句。‎ 答案：A ‎14．A.occupied B．charged C．devoted D．abandoned 解析：occupy sb.with sth.为固定词组，意为“使某人忙于某事”，结合语境可知，主人公开始埋头做作业了。‎ 答案：A ‎15．A.inside B．outside C．upside D．downside 解析：根据上文的“to get the attention of people outside”可推知，后来主人公听到外面有很大的声音，与下文的“There was a large crowd outside，including my teachers and other parents”呼应。‎ 答案：B ‎16．A.relieved B．delighted C．scared D．puzzled 解析：根据“he was rescued”可推知，当主人公得救时，人们都松了一口气。relieved“感到宽慰的”。‎ 答案：A ‎17．A.cheered up B．thumbed up C．warmed up D．built up 解析：根据“bravery and calmness”可推知，微博上许多网民对主人公的勇敢和冷静评价很高。thumb up“竖起大拇指，评价很高”。‎ 答案：B ‎18．A.emergency B．incident C．accident D．event 解析：‎ 主人公被困在故障电梯中，这是一种紧急状况。emergency“紧急情况”；incident“小事件”；accident“意外，(交通)事故”；event“公开活动，重大事件”。‎ 答案：A ‎19．A.compared B．figured C．imagined D．weighed 解析：根据语境可知，此处表示主人公认真权衡(weighed)了利弊。‎ 答案：D ‎20．A.outoforder B．outofdate C．outofbalance D．outofshape 解析：根据上文的多处描述可知，电梯出现故障。outoforder“有故障的”。‎ 答案：A Ⅲ.短文改错 This morning, I got an email from the library. It said the book I reserved was ready to be picking up. Because I had always been waiting to read it, so at that moment I was very exciting. Outside the library, I saw the man driving around the small parking lot, try to find a parking space. He head for the disabled parking space, the only one that was free. He got off his car with a pile of library book to return. Seeing that, I offered to return them to him. He thanked me and jumped quick in his car and drove off, keeping the disabled parking space free for someone needed it.‎ 答案：‎ This morning, I got an email from the library. It said the book I reserved was ready to be up. Because I had always been ‎ waiting to read it, at that moment I was very . Outside the library, I saw man driving around the small parking lot, to find a parking space. He for the disabled parking space, the only one that was free. He got off his car with a pile of library to return. Seeing that, I offered to return them him. He thanked me and jumped in his car and drove off, keeping the disabled parking space free for someone needed it.‎ 书面表达 假如你叫李华，是某一中学的学生，请你根据以下倡议书的内容写一封英文倡议书，谈谈作为中学生用实际行动保持环境。要点如下：‎ ‎1.现在环境情况不令人满意；‎ ‎2.倡议：出行时多步行或骑自行车，不乱扔垃圾等。‎ 注意：‎ ‎1. 字数100词左右；‎ ‎2. 可以适当增加细节，以使行文连贯。‎ 参考范文 Dear Friends,‎ Do you want to live in an enjoyable world? Of course you’d rather you did! However, do you love your present living environment? Maybe most of your answer is not! If so, keeping the following in mind can help you achieve your aim!‎ For one thing, we might as well go to work or school on foot or by bike every day, building up our body. For another, never throwing rubbish around does play an important role in protecting our environment, helping us own a more pleasant living environment. Only in this way can we make our city more and more attractive and harmonious.‎ Please don’t hesitate to join us and protect our environment now. It is our small actions that count! Thank you! ‎ Sincerely yours,‎ Li hua