1、主题训练(二十四)自然灾害与防范，安全常识与自我保护大阅读提升阅读速度内化读文规律(满分70分，限时55分钟).阅读理解(共15小题；每小题2分，满分30分)AClimate change leads to a threat to the worlds sandy beaches, and as many as half of them could disappear by 2100, a new study has found.Even by 2050 some coastlines could be unrecognizable from what we see today, with 1
2、4% to 15% facing severe erosion (侵蚀)Using updated sea level rise predictions, the researchers analyzed how beaches around the world would be in a future with higher seas and more damaging storms.They also considered natural processes like wave erosion, as well as human factors like coastal building
3、developments, which can affect a beachs health.The study found that sea level rise is expected to outweigh these other factors, and that the more heattrapping gases humans put into the atmosphere, the worse the influences on the worlds beaches are likely to be.Its hard to overstate just how importan
4、t the worlds beaches are.They cover more than one third of the worlds coastlines, and protect coastal areas from storms.Beaches are also important economic engines, supporting relaxation, tourism and other activities.And in some areas, the beach is more than a vacation destination.In places like Aus
5、tralia, life near the coast revolves around the beach for much of the year.Some of the worlds most popular beaches are already taking action.Places like Miami Beach are trucking in thousands of tons of sand to patch up (修补) badly eroded shorelines, while others have built sea walls and breakwaters i
6、n an attempt to hold precious sand in place.But the financial and environmental costs of these projects are huge, and scientists say rough seas and more powerful storms, supercharged by a warmer climate, will make this a losing battle.However, the researchers did find that humans have some control o
7、ver what happens to the worlds beaches.If the worlds governments are able to stick to modest cuts in heattrapping gas pollution, the researchers found that 17% of projected beach losses by 2050 could be prevented, and that number will grow to 40% by 2100 if greenhouse gases are limited.语篇解读：本文是一篇说明文
8、。文章主要介绍了一项新的研究发现：气候变化对世界上的沙滩造成了威胁，预计到2100年，多达一半的沙滩可能会消失。因此，一些世界上最受欢迎的海滩已经开始采取行动。1Which is the biggest contributor to severe beach erosion?ADamaging storms.BWave erosion.CCoastal buildings. DSea level rise.解析：选D细节理解题。根据第二段的内容尤其是“The study found that sea level rise is expected to outweigh these other
9、factors”可知，有很多因素会造成沙滩被侵蚀，其中海平面上升是导致沙滩被严重侵蚀的最大因素。2What can we infer from Paragraph 3?AIt is hard to protect coastal beaches.BOne third of storms take place near beaches.CBeaches are of great significance to our lives.DMost Australians live on beach tourism.解析：选C推理判断题。根据第三段的主旨句“Its hard to overstate j
10、ust how important the worlds beaches are.”可知，再怎么强调世界海滩的重要性也不为过。再根据该段中的“Beaches are also important economic engines, supporting relaxation, tourism and other activities.”可知，海滩也是重要的经济引擎，支撑着休闲、旅游和其他活动。根据段尾的“life near the coast revolves around the beach for much of the year”可知，靠近海岸的生活一年中很多时间都以海滩为中心。由此可以
11、推断，第三段主要强调了沙滩对我们的生活非常重要。3What does the underlined word “this” refer to in Paragraph 4?APopularizing the beaches.BHolding sand in place.CReducing the project costs.DStopping global warming.解析：选B代词指代题。根据第四段中的“Places like Miami Beach .sand in place”可知，像迈阿密海滩这样的地方正在努力修补严重侵蚀的海岸线，而其他地方则建造了海堤和防波堤，试图把珍贵的沙子固
12、定住。再根据本段最后一句可知，科学家说汹涌的海洋和更强大的风暴因更温暖的气候而增压，这将会使得固定沙子是一项失败的举措。因此可知，this指的是holding sand in place。B(2021重庆调研)A shirt, tie and blazer may not be my favorite, but if I were given the choice, I wouldnt throw away the idea of school uniform. Wearing a uniform is a badge of pride, creates an identity for a s
13、chool and is an important part of being a school student.My school is one of many that seem to be shifting to a more formal uniform this September I will be wearing a shirt and blazer instead of my old jumper and polo shirt. A number of students have complained about the change, but some people beli
14、eve that a school uniform can improve learning by reducing distraction, sharpening focus on schoolwork and making the classroom a more serious environment, allowing students to perform better academically. Perhaps most importantly, a uniform means students dont have to worry about peer pressure when
15、 it comes to their clothes. When everyone is dressed the same, worrying about what you look like isnt so important. There is no competition about being dressed in the latest trend, which would put a great deal of financial pressure on students and parents. Potential bullies have one less target for
16、their insults; its hard to make fun of what someone is wearing when youre dressed exactly the same.In America, where a majority of schools do not have a uniform, roughly 160,000 children miss school every day due to fear of attack or intimidation by other students. This might not be directly linked
17、to what theyre wearing, but having a uniform can be a safety net for many students who might otherwise suffer from bullying. A uniform gives the impression that rules are strict, perhaps helping maintain a sense of order at school.My uniform might not be what I would wear in my own time, but it give
18、s me a sense of belonging, takes away the pressure of what to wear and stops the bullies. School uniform isnt fashionable, but thats exactly why I think it should be here to stay.语篇解读：本文是一篇议论文。在学校“我”选择穿校服，因为校服是学校的标志，学生统一穿校服能使教室成为严肃的场所，让学生更加专注于学习；此外，穿校服还能减少校园欺凌事件的发生。4Why does the writer mention Ameri
19、can children without uniforms in the passage?ATo show pity for American kids.BTo raise the governments attention.CTo prove the benefits of school uniform.DTo inform readers of American kids uniforms.解析：选C推理判断题。根据第三段的内容大意可知，对于许多可能遭受欺凌的学生来说，校服是一种保护措施，而且也帮助维持了学校的秩序。据此可推知，作者在此提及美国儿童没有穿统一的校服旨在说明校服的好处，故C项
20、正确。5What is the writers attitude towards school uniforms?ADisapproving. BConfused.CSuspicious. DFavorable.解析：选D观点态度题。根据尾段中的“it gives me a sense of belonging, takes away the pressure of what to wear and stops the bullies. School uniform isnt fashionable, but thats exactly why I think it should be her
21、e to stay”可推知，作者对校服持赞同的态度，故D项正确。6Which is the advantage of wearing school uniforms for school kids?AIt sharpens concentration on outdoor tasks.BIt removes the teachers financial pressure.CIt satisfies students dressing tastes and favorites.DIt helps students maintain a sense of order at school.解析：选D
22、细节理解题。根据第三段最后一句“A uniform gives the impression that rules are strict, perhaps helping maintain a sense of order at school”可知，校服也会给人留下规章制度严格的印象，有助于维持学校的秩序，故D项正确。7What is the best title for the passage?AMy Cool School UniformBThe Point of School UniformCThe Idea of Dressing ProperlyDThe Way of Guardin
23、g Kids Safety解析：选B标题归纳题。通读全文可知，作者在文章中讲述了穿校服的诸多好处，力荐学生应该穿校服上学。故B“对校服的看法”能概括文章主旨，最适合作本文的标题。CPlants cannot run or hide, so they need other strategies to avoid being eaten. Some curl up their leaves, others produce chemicals to make themselves taste bad if they sense animals drooling on them, chewing th
24、em up or laying eggs on them all signals of an attack. New research now shows some flora can feel a planteating animal well before it launches an attack, letting a plant prepare a preemptive (先发制人的) defense that even works against other pest species.When ecologist John Orrock of the University of Wi
25、sconsinMadison sprayed snail slime a liquid the animals release as they slide along onto soil, nearby tomato plants appeared to notice. They increased their levels of an enzyme (酶), which is known to prevent planteating animals. “None of the plants were ever actually attacked，” Orrock says. “We just
26、 gave them cues that suggested an attack was coming, and that was enough to cause big changes in their chemistry.”Initially Orrock found this defense worked against snails; in the latest study, his team measured the slimy warnings impact on another potential threat. The investigators found that hung
27、ry caterpillars (毛虫), which usually eat tomato leaves greedily, had no appetite for them after the plants were exposed to snail slime and activated their chemical resistance. This nonspecific defense may be a strategy that benefits the plants by further improving their overall possibilities of survi
28、val, says Orrock, who reported the results with his colleagues in March in Oecologia.The finding that a snails approach can cause a plant response that affects a different animal made Richard Karban curious, a plant communications expert, who was not involved in the study. “It is significant that th
29、e plants are responding before being damaged and that these cues are having such farranging effects，” Karban says. The research was comprehensive, he adds, but he wonders how the tomato plants felt chemicals in snail slime that never actually touched them.“Thats the milliondollar question，” Orrock s
30、ays. He hopes future research will make out the mechanisms that enable plants to sense these relatively distant cues.语篇解读：本文主要介绍了一项新的科学研究。研究表明植物会对外在威胁相当警觉，会自动作出反应进行自我保护。8John Orrock sprayed a liquid onto soil near tomato plants to _.Amake them grow betterBgive them a warningCkeep planteating animals
31、 awayDinform planteating animals of danger解析：选B推理判断题。根据第二段最后一句可推知，John Orrock在西红柿植株附近的泥土上喷洒液体的目的是给予植物一种警告，让它们能够产生自我保护性反应，且其与第三段第一句中的“his team measured the slimy warnings impact on another potential threat”呼应，故选B。9Why is the example of “caterpillars” mentioned in Paragraph 3?ATo introduce another ani
32、mal.BTo confirm the result of the study.CTo appeal to people to protect animals.DTo analyze different resistance chemicals.解析：选B推理判断题。根据第三段第一句“Initially Orrock found this defense worked against snails; in the latest study, his team measured the slimy warnings impact on another potential threat”可推知，文
33、章中提到毛虫的例子是为了验证研究的结果，故选B。10What does Richard Karban really want to know?AHow tomato plants become aware of danger.BWhat the chemicals in the snail slime are.CWhether the research is of practical value.DWhat the finding of the research is.解析：选A推理判断题。根据第四段最后一句“The research was comprehensive, he adds, b
34、ut he wonders how the tomato plants felt chemicals in snail slime that never actually touched them”，并结合对最后一段的整体理解可推知，Richard Karban实际上想了解的是西红柿植株是如何意识到危险的，故选A。11What can be a suitable title for the text?AWatchful Plants BGreedy AnimalsCA Snails Approach DA Defense Attack解析：选A标题归纳题。根据文章中的关键词plant，并结合对
35、全文的整体理解可推知，本文主要讲述的是有关植物的科学研究，研究发现植物有对外在威胁或攻击的自我保护性反应，故选A。D(2021湖南五市十校联考)An online supermarket company Ocado in the UK, has recently displayed a robotic hand that can pick fruits and vegetables!When an embryo is in the womb (子宫), the very first sense it develops is touch. The sense of touch is also t
36、he one that lasts longest as we get older and our vision and hearing begin to weaken, touch still remains. Humans use their touch to protect themselves, to create emotional relationships with other people and to experience pleasure. Can you imagine life without it?The sense of touch comes from a net
37、work of nerve endings (神经末梢) and special touch receptors on the surface of the skin. While there are different kinds of touch receptors, they help us judge pressure, texture and vibrations. They are located in our fingertips, palms, soles of our feet, face, lips and tongue.When we touch something, t
38、he mechanoreceptors feel the touch and through a network of nerves send signals to the brain. This informs the brain about the location of the touch, the amount of force used, and the speed at which it was used.Several different techniques have been tried in the past few years to create such a robot
39、ic hand using three fingers. But this latest design by SoMa copies the human hand. It is made up of flexible materials which grasp the thing based on its size and shape. Then air pressure is used to control the movement of the robotic fingers to pick objects safely and without causing damage.The nex
40、t step would be for the robot to judge how ripe the fruits and vegetables are, and apply pressure accordingly. Members of the research team are currently working on adding computerized vision to the robots, so that they can see what they are grasping.Does all this mean robots can replace people? Acc
41、ording to Ocado, they help improve productivity by removing some of the repetitive tasks done by humans.语篇解读：本文是一篇科普说明文。英国在线超市Ocado最近展示了一只可以采摘水果和蔬菜的机械手，它由有柔韧性的材料构成，并能依据物体的大小和形状来进行摘取。12What is focused on in the second paragraph?AThe origin of touch.BThe importance of touch.CThe development of touch.D
42、The process of transporting touch.解析：选B段落大意题。通读第二段可知，该段第一、二句说明了触觉是人体最先发育、持续时间最长的感觉；根据第二段第三句“Humans use their touch to protect themselves, to create emotional relationships with other people and to experience pleasure”可知，人们用触觉来保护自己，创造和他人的情感联系；据此可推知，该段主要介绍了触觉的重要性，故B项正确。13What does the underlined word
43、“it” in Paragraph 4 refer to?AThe brain. BThe touch.CThe nerve. DThe signal.解析：选B代词指代题。根据第四段第二句“This informs the brain about the location of the touch, the amount of force used, and the speed at which it was used”可知，这告知大脑所要触摸的位置、使用的力度以及使用的速度；结合第四段内容可知，该段主要介绍触觉发生的原理；据此可推知，画线词代指该句中的“touch”，故B项正确。14Wha
44、t is the typical feature of the latest robots?AThey can see what theyre taking hold of.BThey can take the place of people in work places.CThey can tell whether the fruits and vegetables are ripe.DThey can hold things according to their outer features.解析：选D细节理解题。根据第五段第三、四句的内容尤其是“grasp the thing based
45、 on its size and shape” “pick objects safely and without causing damage”可知，最新的机器人的特点是能根据水果和蔬菜的外部特征去进行摘取，故D项正确。15What can be a suitable title for the text?AA Sense of Touch for RobotsBA Robotic Hand for Classifying FruitsCA Robotic Hand with a Gentle TouchDA Robot Made of Flexible Materials解析：选C标题归纳题
46、。通读全文可知，文章第一段点明全文主题；结合全文内容可知，文章主要介绍了一种能用适当的力度采摘水果、蔬菜的机械手，故C项最适合作本文标题。.阅读七选五(共5小题；每小题2分，满分10分) How to protect your earsYou and your friends are leaving a concert on a Friday night. When you get outside, your ears are ringing. You have to shout to be heard. _16_ So no harm done . right?Not quite. Temp
47、orary buzzing may be easy to ignore, but repeated exposure to loud noise will eventually cause serious and irreversible (不能治愈的) hearing loss. A new study conducted by researchers at Brigham and Womens Hospital in Boston shows that one in five people between the ages of 12 and 19 are experiencing sli
48、ght hearing loss, and one in 20 have mild hearing loss. _17_ But the good news is that there are plenty of ways you can protect your ears from further damage and still listen to the music you love.Ask around.Put your earbuds in or your headphones on, and then ask a friend next to you whether or not
49、he or she can hear what youre listening to. _18_ Turn it down.Buy noisecanceling headphones.A pair of earbuds or headphones that fits comfortably will limit outside noise so that you can hear your music better at lower volume.Take breaks. _19_ So when listening to music, take your headphones off for
50、 15 or 20 minutes and let your ears enjoy the quiet._20_ You can buy a cheap pair at any drugstore as an easy way to lower volume at concerts or while playing or practicing your own music without changing the quality of the sound.AUse earplugs.BKeep the volume below 70 percent.CIf the answer is yes,
51、 your music is too loud.DBut by morning, your hearing is totally back to normal.ELike every other part of your body, your ears need rest.FUnfortunately, theres no way to get back hearing youve already lost.GThe exposure to noise is louder and longer than in any previous generation.语篇解读：本文是一篇说明文，主要介绍
52、了几种保护耳朵的方法，包括询问身边的人音乐的音量、购买噪音消除耳机、定时休息和使用耳塞。16选D根据上文可知，某个周五晚上的音乐会让你耳鸣；结合空处后一句“So no harm done . right？”可知，耳朵似乎并没有受到伤害；据此可推知，空处应表示转折，故D项“但是到了早上，你的听力完全恢复正常”符合语境。17选F根据空处后一句可知，但好消息是，有很多方法可以保护你的耳朵免受进一步的伤害，同时还能继续听你喜欢的音乐。据此可推知，空处与此句为转折关系，故F项“不幸的是，你已经丧失的听力无法恢复”符合语境，衔接上下文。18选C空处上文是说当你戴上耳塞或耳机时，问一下你身边的朋友是否能听见
53、你听的东西，再结合空后一句“Turn it down”可知，C项“如果答案是肯定的，你的音乐太大声了”符合语境。19选E根据该段小标题Take breaks并结合空处后一句可知，该段主要建议让耳朵定时休息，故E项与此处匹配。20选A根据文章的结构以及空处所在的位置可知，空处为该段的小标题；根据该段的内容可知，你可以在任何一家药店买到一副便宜的耳塞，可以用于降低音乐会的音量。据此可知，该段主要建议准备一副耳塞，故A项正确。.完形填空(共20小题；每小题1.5分，满分30分)Susie Goodall finally was discovered and rescued. She was a vo
54、lunteer in the _21_ Golden Globe Race accompanying sailors through the _22_ every June. On Wednesday morning, Goodall was 2,000 miles west of South America when her boat was like a drunken man in a strong wind and a broken bar knocked her _23_ unconscious. But soon after that she _24_ and at once ra
55、ng the alarm through her emergency system. And a series of troubling _25_， which had recorded her happenings during the journey, were _26_ on her social media page at once.Chiles Maritime Center received her _27_ and soon ordered a ship to change its _28_ to rescue Goodall. Meanwhile, all Goodall co
56、uld do was wait trying to keep her boat _29_ in the waving South Pacific and pumping out water that was _30_ into the damaged cabin (船舱). That made her _31_ her present situation.The Chilean ship finally _32_ Goodall. Then lowering down a small boat to save her seemed _33_ because up to 13 feet wave
57、s would _34_ the boat at any time. _35_， crew members on board _36_ another way. They lowered a long thick rope from the ship, and _37_ Goodall from her ship to safety. As luck would have it, the chosen method _38_ worked.Goodall arrived at the Chilean port without any delay. On her social media pag
58、e, Goodall wrote, “They were the hardest and loneliest days Ive ever had. Actually, all I wanted was a break with no _39_ to the busy daily life. But I might as well _40_ home instead of giving up.”语篇解读：Susie Goodall在陪同水手参加Golden Globe Race比赛的过程中，所乘船只因遇到巨浪而剧烈摇晃，她自己也被断裂的栏杆砸晕；醒来后，她立即拉响了警报器；后来在智利海事中心的帮
59、助下，她最终转危为安。21.A.final BpreviousCmonthly Dannual解析：选D根据第22空后的“every June”可知，Susie Goodall每年都会作为志愿者陪同水手参加比赛。故选D。22A.tour BvoyageCtrip Dscene解析：选B根据空前的“sailors”以及下文中的“her boat”可知，这些人参加的是航行比赛，故选B。23A.permanently BtotallyCtemporarily Dseriously解析：选C根据第24空后的“at once rang the alarm”可知，她只是被断裂的栏杆暂时砸晕了。故选C。24
60、A.awakened BsleptCshouted Dcried解析：选A根据第23空后的“unconscious”及该空后的“rang the alarm”可知，她不久就醒过来了。故选A。25A.updates BquestionsCfantasies Dthoughts解析：选A根据该空后的“which had recorded her happenings”以及第26空后的“on her social media page”可知，记录她在航行中发生的事情的一系列最新信息立即就被发布在社交媒体网页上。故选A。26A.put BgatheredCposted Dsent解析：选C参见上题解析
61、。A项意为“放，安置”；C项意为“发布”；D项意为“发送”。27A.call BwarningCsignal Dreply解析：选C根据第24空后的“rang the alarm through her emergency system”可知，她当时拉响了警报器，由此可知，此处表示智利的海事中心收到了她发出的信号。故选C。28A.system BcourseCsubject Dpolicy解析：选B根据第27小题的解析可知，海事中心收到信号后，即刻命令一艘船改变航向(course)去营救Goodall。29A.dry BtidyCstill Dsteady解析：选D根据空后的“the wavi
62、ng South Pacific”可知，当时海浪凶猛，因此她在等待的过程中，尽量让船保持稳定(steady)。30A.leaking BflyingCflowing Ddropping解析：选A根据上文中的“pumping out water”及下文中的“the damaged cabin (船舱)”可知，当时船已经受损，并且开始渗水。leak“渗入”。31A.curious about Bworried aboutCsatisfied with Ddisappointed with解析：选B根据第29、30小题的解析可知，当时船已经开始渗水，她需要在巨浪中稳住船只、抽掉渗入的水等待救援。由此
63、可推知，她对自己当时的处境非常担心。故选B。32A.rescued BabandonedCpassed Dspotted解析：选D根据下文中的“lowering down a small boat to save her”可知，赶来救援的智利船只发现了(spotted)她。33A.fast BproperCimpossible Duncomfortable解析：选C根据下文中的“up to 13 feet waves”并结合常识可知，当时放下小船去救她这一做法看起来是不可能的，当时海浪太大，小船随时都有可能被海浪吞没。故选C。34A.swallow BliftChit Dpush解析：选A参见
64、上题解析。35A.Besides BOtherwiseCInstead DAlso解析：选C根据第33小题的解析及第36空后的“another way”可推知，考虑到用小船救人是不可能的，而有船员推荐另外一种方式。36A.changed BrecommendedCadmired Ddescribed解析：选B参见上题解析。37A.pulled BkeptCgrasped Dfetched解析：选A根据上文中的“They lowered a long thick rope from the ship”可推知，营救人员放下一根又长又粗的绳子，然后将Goodall从她自己的船上拉到安全的地方。故选A
65、。38A.hardly BprobablyCusually Dreally解析：选D根据最后一段第一句中的“Goodall arrived at the Chilean port”可知，用绳子救人的方法真的奏效了。故选D。39A.answer BaccessCdamage Dcontribution解析：选B根据空前一句可知，在海上遇险的那几天是她最艰难、最孤独的时期。由此可推知，被营救之后，她只想休息，而不想再让自己接触那些繁忙的日常事务。40A.drive BrideCwalk Dsail解析：选D根据第39小题的解析可知，虽然她不想再如此劳累了，但她还是认为自己最好还是开船返航回家，而不
66、是就这样放弃。故选D。精表达夯实语言基础提升表达能力.单词拼写1Pompeii was destroyed when the volcano (火山) erupted in 79AD.2It not only affects our everyday life, but may also threaten (威胁) peoples lives.3Its reported that more volunteers will go to New Orleans for the hurricane (飓风) cleanup.4The government should improve the war
67、ning system to predict (预测) bad weather and natural disasters.5After the typhoon, nearly all the water and electricity supplies are damaged (毁坏) or even destroyed.6The Great Wall would be in ruins (废墟) one day if we didnt take any steps to protect it.7Unluckily, rain forests are disappearing (消失) at
68、 a rate of 80 acres per minute!8The organization distributed (分发) food to the flood victims, which was highly praised.9The drought (干旱) in the southwest of China has lasted for several months, which makes people face water shortage.10Its reported that the heavy rainfall (降雨量) caused rivers to break
69、their banks, washing away bridges.单句语法填空1Look! From opposite the street come two kids, screaming in panic.2Every year, new graduates are seeking for jobs suitable (suit) for themselves.3The government has an interest in importing scientific equipment (equip)4She was the first woman to_be_appointed (
70、appoint) to the board, for which she felt very excited and happy.5The parents outside the school gate are being anxious (anxiety) about their childrens safety.6If you have the interest to visit there, dont forget to take a camera and you are guaranteed to_enjoy (enjoy) the sights in their natural st
71、ate.7Appreciation (appreciate) of works of art is bound to be dominated by a particular kind of interest.8The dog had been knocked unconscious (conscious) but had survived by drinking water from a fresh stream.9Cycling is absolutely (absolute) an energysaving means of transportation.10Recently, peop
72、le are terrified (terrify) of talking about one word “haze”.完成句子1The earthquake caused_structural_damage_to most of the buildings in the town.这次地震给城镇的大部分建筑造成了结构性的破坏。2Sometimes_a_smile_is_so_powerful_that_it gives people suffering from disasters great courage.有时候，微笑会如此有力量以至于它给遭受灾难的人以巨大的勇气。3A severe e
73、arthquake destroyed almost everything, leaving_badly_damaged_buildings.一场剧烈的地震几乎毁了一切，留下了严重受损的建筑物。4The country_has_provided_food_and_clothes_for_the_homeless_people in the disasterstricken areas.这个国家已经为灾区无家可归的人们提供了食品和衣物。5The strong tsunami has_caused_more_than_4,000_deaths and 8,000 people missing.强海
74、啸已造成4 000多人死亡，8 000多人失踪。.书面表达假定你叫李华。你校英语俱乐部准备在本周五下午举行有关校园安全(campus security)的英语演讲活动。请根据以下提示，写一篇演讲稿。1现状；2.重要性；3.措施。注意：1.词数100左右；称呼语已给出，不计入总词数；2可以适当增加细节，以使行文连贯。Dear fellow students， 参考范文：Dear fellow students，My name is Li Hua. As is wellknown, the campus security is a hot topic nowadays. For instance,
75、 we often hear or see campus violence. Theres no doubt that the campus security is directly related to students healthy growth and the happiness of millions of families.Then firstly, we should raise our safety awareness all the time, such as not running after each other, especially going downstairs or upstairs. Secondly, when having any trouble with someone, we should communicate patiently rather than quarrel or even fight. Lastly, we should report to teachers immediately if there is something wrong happening.So lets make joint efforts to create a harmonious campus. Thanks for your listening.