高考七选五技巧一 讲义-2026届高三英语二轮复习专项

该高中英语讲义聚焦高考七选五题型，围绕主旨概括、过渡衔接、细节支撑等核心考点，按题型综述、解题步骤、技巧突破的逻辑架构展开，通过考点分类梳理、解题方法指导、真题实例演练等环节，帮助学生构建语篇分析框架，突破逻辑衔接与句式匹配难点，体现复习教学的系统性与针对性。 资料以句式同构（如小标题祈使句）和主从句分析为特色策略，结合2024全国甲卷等真题设计“关键词圈画+逻辑链推导”活动，培养学生语言能力与思维品质。分层设置真题链接与变式训练，保障不同层次学生高效突破，为教师把控复习节奏、提升学生应考能力提供有力支撑。

高考七选五技巧一 （主从句/句式同构） 1． 题型综述 · 题型简介 高考英语阅读七选五，主要向读者介绍知识、说明事物原理、解释操作流程、讨论某个观点或阐释社会文化现象等 。文本条理清晰，常运用小标题、数字序号、逻辑连接词来组织行文，让复杂内容层次分明，方便读者理解。这类题型要求考生从七个备选项中选出五个合适的句子，填补文章空缺处，使文意连贯、逻辑顺畅，综合考查阅读理解、语篇分析及上下文衔接能力。 · 命题类型 · 主旨概括句：常位于段落开头，用来点明段落核心主题，起引领全段内容的作用，如选段围绕某种环保新技术展开，此空句子会概括该技术的总体特性。 · 过渡衔接句：衔接上下文，既总结上文要点，又引出下文话题，让行文过渡自然，毫无突兀感。比如前文讲传统教育模式，后文谈线上教育革新，中间过渡句就需关联二者。 · 细节支撑句：为前文提出的论点、概念提供具体例子、数据、解释说明，充实文章内容，让抽象观点变得具体可感，像提到健康饮食好处后，紧跟列举具体有益的食材。 · 结论概括句：考查对文章结论的概括能力，选项需要能够总结文章的主要观点。 · 解题步骤 · 观察文章结构：快速浏览文章标题，了解中心；观察文章是否有小标题，小标题大多是祈使句；观察设空处是否有逗号、问号、破折号等 · 看设空位置，预判功能：如果空缺在段首，大概率是主旨句，要找能总领全段的选项；在段中，多为过渡或细节支撑句，需联系前后文语义关联；处于段尾，可能是总结句，或是引出下段话题的过渡语。 · 阅读选项，圈画关键词，找呼应：在选项中圈出名词、动词、形容词等实词，以及逻辑连接词，为做题做好准备。例如，选项有 “but” 表转折，上文也应有转折语义相关内容；若选项中有“also”等表示递进关系的词，那么原文与选项一定有递进关系。 · 利用逻辑线索：关注文中 “firstly”“secondly”“moreover”“however ”“therefore” 这类逻辑词，它们能清晰展示行文顺序、语义递进、转折对比、因果推导关系，顺着逻辑链条筛选适配选项。 · 检查：先检查逻辑，再带入语义代入检查：把选定的选项依次代入原文空缺处，通读全文，核查上下文衔接是否流畅，语义是否连贯，语法有无错误，若读起来拗口、语义断裂，需重新斟酌选项。 2、 解题技巧 提分技巧1：句式同构（小标题/非小标题） 句式同构技巧分为两类，一是同学们熟悉的祈使句类的小标题，这种题目需要结合中心主旨来解题，二是类似于语文里面的排比句，但是这类排比句并不像语文的排比句那样规整，接下来我们结合例题来分析。 典型例题： Ⅰ、小标题类： 例题1：2024年全国甲卷 What is moderation (适度)? Basically, it means eating only as much food as your body needs. You should feel satisfied at the end of a meal, but not too full. .... But it doesn't mean saying goodbye to the foods you love. Take your time. ..... Eat with others whenever possible..... Control emotional (情绪的) eating. .... ____20____ A healthy breakfast can start your metabolism (新陈代谢), while eating small, healthy meals keeps your energy up all day. Avoid eating late at night. Try to eat dinner earlier and fast for 14 — 16 hours until breakfast the next morning. Studies suggest that eating only when you're most active and giving your digestive system a long break each day may help to regulate weight. A. Eat properly throughout the day. B. We don't always eat just to satisfy hunger. C. Don't swallow a meal on the way to work. D. Most of us need to double the amount we eat. E. Instead, surround yourself with healthy choices. F. For many of us, moderation means eating less than we do now. G. That won't lead to cheating or giving up on your new eating plan. 答案：A 解析：观察除了第一自然段后的每个自然段的首句，都是祈使句，由此可得，20题的备选选项应该是A/C，再结合本段的中心，本段提到了早餐、晚餐应该怎么去吃，所以应该是选择A项。 例题2：2024年新课标2卷 Overtourism Is For Real: How Can You Help? Travel promotes understanding, expands our minds, makes us better people, and boosts local economies and communities, but the rapid growth of travel has led to overtourism in certain regions and destinations. ...... Certainly not. The loss of what travel offers would be unacceptable in today’s world. Here are some tips on making wise decisions to minimize pressure on the places we visit and improve our experience. ●Choose mindfully. ●Get creative. ●___19___ Minimize impact and maximize experience by skipping major holidays or rush hour. You’ll compete with fewer tourists, save money, experience a different side of a popular place, and boost the economy when tourism is traditionally slower. Visiting a place that others call home is a privilege (荣幸). Do your part to preserve what makes a destination special in the first place. ....... You may be amazed how much closer you’ll feel to the people there. A. Visit during off-peak times. B. So, should we stop traveling? C. Travel for you and no one else. D. Can overtourism be avoided then? E. You can still find relatively undiscovered places. F. You’ll find yourself virtually alone, or close to it. G. Consider giving back to the communities you’re visiting. 答案：A 解析：观察除了第一自然段后的每个自然段的首句，都是祈使句，由此可得，20题的备选选项应该是A/C/G，再结合本段的中心，本段提到了skipping major holidays or rush hour，所以应该是选择A项。 Ⅱ、非小标题类： 例题1：2024浙江卷1月 In the past few years, online learning has become a significant part of the university and college experience. ___16_G__ But are all online courses created equal? How can you be sure that digital learning is right for you? ___17___ ...... A. But that doesn’t mean there aren’t deadlines. B. Your motivation should be your main concern. C. Do you know that online courses are also part of your education? D. Professor Alex Davidson teaches the same course in person and online. E. The chief complain t about online courses is that they lack human interaction. F. If you take an online course, what can you do to ensure the best possible grade? G. A survey found that 29 percent of college students registered for online courses. 答案：F 解析：结合17题前面两句话，都是问句（首段出现问句即是文章中心)，备选选项为C/F，再结合上下文，下文讲的是网课的效果最大化，所以本题选择F。 例题2：2023年北京卷 It’s a joyful and stressful time of year in the United States for students and their families as they make decisions about where to attend college. Families often turn to rankings systems to help make a decision. ____35_D___ When I talk to families as a scholar of higher education, they’re often surprised that teaching excellence is not counted in rankings. ____36____ ...... A. Higher education has achieved its true potential. B. Therefore, it’s not highly valued in hiring or promotion. C. Quality teaching has been an important reputation-building factor. D. However, the rankings ignore a critical factor: the quality of teaching. E. Efforts to improve teaching at the university level have recently emerged. F. They’re even more surprised at how teaching is undervalued by universities. G. In fact, universities often shift emphasis from teaching to other ranking factors. 答案：F 解析：上文they’re often surprised that....，F选项里出现了They’re even more surprised....，形成了递进关系和排比，再加上they都代指家庭，所以综合下来选择F。 真题链接： 【2022新高考一】 Fitness Magazine recently ran an article titled "Five Reasons to Thank Your Workout Partner." One reason was: "You'll actually show up if you know someone is waiting for you at the gym," while another read: " 36 " With a workout partner, you will increase your training effort as there is a subtle（微妙）competition. So, how do you find a workout partner? First of all, decide what you want from that person. 37 Or do you just want to be physically fit, able to move with strength and flexibility? Think about the exercises you would like to do with your workout partner. You might think about posting what you are looking for on social media, but it probably won't result in a useful response. 38 If you plan on working out in a gym, that person must belong to the same gym. My partner posted her request on the notice board of a local park. Her notice included what kind of training she wanted to do, how many days a week and how many hours she wanted to spend on each session, and her age. It also listed her favorite sports and activities, and provided her phone number. 39 You and your partner will probably have different skills. 40 Over time, both of you will benefit — your partner will be able to lift more weights and you will become more physically fit. The core（核心）of your relationship is that you will always be there to help each other. A. Your first meeting may be a little awkward. B. A workout partner usually needs to live close by. C. You'll work harder if you train with someone else. D. Do you want to be a better athlete in your favorite sport? E. How can you write a good "seeking training partner" notice? F. Just accept your differences and learn to work with each other. G. Any notice for a training partner should include such information. 答案：CDBGF 【2023年新高考2卷】 As an artist who shares her journey on social media, I’m often asked by curious followers how to begin an art journey. Unfortunately, there is no magic list I can offer. I do remember, though, what it was like to be a complete beginner. So I’ve put together some good tips for starting an art journey. ·Start small. I suggest using a sketchbook (素描本) for small studies. These small studies provide inspiration and may be a springboard for more complex works in the future. ___36___ You’ll want to look back on your journey to see how far you’ve come. ·Paint often and paint from life. There’s no better way to improve than to put in those brush miles. Whether you paint still lifes, portraits, or landscapes, paint from life as much as possible. ___37___ ·Continually challenge yourself to try something new. ___38___ Artistic growth can be a bit painful. Welcome to the club；we’ve all been there. I love taking on challenges. I once took up a challenge to create a painting every day for a month and post the works online. ·___39___ Seeking and accepting constructive feedback (反馈) is crucial to growth. I post my work on social media and, in turn, have met some of the kindest people. They make me feel valued and respected, no matter my level of artistic ability. The journey you’re on won’t follow a straight path. ___40___ Push through, give it time and put in the effort. You will harvest the rewards of an artistic life. A. Get out of your comfort zone. B. Make career plans and set goals. C. Don’t throw away your beginner art. D. Share your work if you feel comfortable doing so. E. You’ll hit roadblocks, and you’ll feel discouraged at times. F. Evaluate your performance and, if needed, redefine your role. G. You’ll develop that painting muscle memory that only comes with repetition. 答案：CGADE 提分技巧2：主从句 主从句题目指的是，观察文章设空处是否有标点符号，如果是逗号、破折号，那么可能涉及到主从句或者首字母小写，这里需要注意逗号是否有用，有一些逗号蕾题目可能是并列句或者是需要选择主句，这样的话逗号是没有用的；如果是问号，那么正确选项一定是问题，下面结合例题来讲解。 Ⅰ、逗号类（有用）： 例题1：2022全国甲 Important Things to Know When Dining Out Cultural dining etiquette (礼节) might surprise you with some of its important rules. 36 D . Knowing some tips will help ensure that you have an enjoyable meal with friends or family — no matter where you are in the world. Chopstick Rules ...... Hands or Utensils (餐具) ...... Making Requests ...... Some of these cultural dining etiquette rules may seem random and strange, but they are important in various countries. 40 , the more comfortable you'll begin to feel with its foreign cultural practices. A. The more friends you make in your lifetime B. The more time you spend in any given country C. Mexicans consider it inappropriate to eat with utensils D. Don't get caught making an embarrassing mistake at a restaurant E. It's a good sign for the chef if you make a mess around your plate F. Never stick them upright in your food or cross them as you use them G. It may seem like a simple request to ask for salt and pepper at a meal 答案：B 解析：观察文章得到40题有逗号，而且逗号之后是the more（the+比较级）的结构，结合选项AB说明这里AB是备选选项，再结合后文以及文章中心可得正确选项为B。 例题2：2018全国一 Color is fundamental in home design—something you’ll always have in every room. A grasp of how to manage color in your spaces is one of the first steps to creating rooms you’ll love to live in. Do you want a room that’s full of life? Professional? Or are you just looking for a place to relax after a long day? _____36_____, color is the key to making a room feel the way you want it to feel. Over the years, there have been a number of different techniques to help designers approach this important point. _____37_____, they can get a little complex. But good news is that there’re really only three kinds of decisions you need to make about color in your home: the small ones, the medium ones, and the large ones. ....... A. While all of them are useful B. Whatever you’re looking for C. If you’re experimenting with a color D. Small color choices are the ones we’re most familiar with E. It’s not really a good idea to use too many small color pieces F. So it pays to be sure, because you want to get it right the first time G. Color choices in this range are a step up from the small ones in two major ways 答案：36.B 37.A 解析：观察36.37两个小题后面都有逗号，并且后面的句子都是主句，说明这两个小题都应该选择从句，那么备选选项就是A\B\C，36题再结合前面的问题，这里应该选择问题的答案，所以选择B，37题结合后文的代词they，说明37应该有一个复数名词或者是指代复数的代词，所以选择A。 逗号类（无用）： 例题：2023年全国乙卷 Indoor plants might look as if they just sit around not doing much, but in many ways they are the unsung heroes of the home. ____36____, but studies have shown that they can promote people’s wellbeing by improving their mood (心情), reducing stress and helping their memory. What’s more, indoor plants are easy to look after and are not very expensive. ....... Aloe vera, peace lilies and spider plants are some of the species that are easy to grow indoors. You can buy plants from supermarkets, garden centres or online. Younger plants are often cheaper than fully grown ones, and you get to care for them as they mature — which is part of the joy of owning plants. “____40____,” Spoelstra says. “It can bring a new interest and focus into people’s lives and help to make the link between home and nature.” A. All plants are different B. Not only do they look beautiful C. There are many benefits to growing plants indoors D. Instead, they grow better inside, where it is warmer E. Plants like peace lilies and devil’s ivy are among the best F. Changing the pot of your plant from time to time will also help G. Learning about the requirements of each plant can be very rewarding 答案：36.B 40.G 解析：本题中，36题的逗号是有用的，因为后面立马跟了一个but，结合B选项当中的not only，所以B选项为备选对象，再结合上下文选择了B。但是40题的逗号就是无用标点符号，既不是主从句，也不是像36题那样的连词，所以做题的时候，只能按照常规思路去做，结合后文的it，指代学习每个植物的要求这件事，用代词指代技巧解题。 Ⅱ、破折号类 例题：（23-24高三下·海南省直辖县级单位·开学考试） Some of the oldest living things on our remarkable planet are trees. The record holders are bristlecone pines (狐尾松) of the western United States, quite a few of which are known to be more than 3,000 years old. One individual, discovered in 2012, is estimated to be more than 5,060 years old, making it the oldest known non-clonal tree in the world! 21 C : individuals across a number of other tree species have also been around for thousands of years. ...... Older trees benefit greatly from having bodies made mostly of dead woody tissue. In fact, an old tree might be as much as 95 percent dead tissue! Given that it isn’t alive, wood does not require metabolic (新陈代谢的) activity to maintain it, 25 . A．so an old tree doesn’t really need to do much to keep living B．This is a question that has something to do with the good luck of trees C．However, bristlecones are certainly not alone in terms of the oldest creatures D．This is a fascinating question for biologists that does not yet have a settled answer E．What’s more, some ancient trees have superior chemical defenses against pests and diseases F．which means that trees can survive everywhere without being limited by external and internal conditions G．we know that ancient trees age in ways that are dramatically different from the ways that most animals and even other plants age 答案：A 解析：观察文章可得，25题首字母应小写，备选选项为AFG，结合上文Given that it isn’t alive, wood does not require metabolic (新陈代谢的) activity to maintain it，死去的木头不需要新陈代谢活动来维持它的（生命），所以一棵老树不需要很多来存活，上下文之间包含了一个因果关系。 Ⅲ、问号类 例题：2021全国乙卷 According to Jessica Hagy, author of How to Be Interesting, it’s not difficult to make yourself interesting at a dinner party. ...... 38 ? If you can’t take their wine away, you should certainly try to take away their soapbox （讲台）. If you’re the host, you can ask them to help you in the kitchen with something and just remove them from the situation. 39 . ...... A. How do you know the host B. The first step is to go exploring C. If you ask the question “How did you get here?” D. Be prepared to have awkward conversations with strangers E. Or turn the conversation into a topic where they have little to say F. What about that person who had too much to drink or won’t stop talking G. He or she is the person who is feeling the weight of that awkwardness the most 答案：F 解析：38题之后有一个问号，所以38题是一个问题，备选选项为AF，结合后文If you can’t take their wine away, you should certainly try to take away their soapbox （讲台），提到了wine和soapbox，选择F。 真题链接： 【2021全国乙】 According to Jessica Hagy, author of How to Be Interesting, it’s not difficult to make yourself interesting at a dinner party. 36 , if you’re out of your comfort zone or if you’re wandering into somebody’s house for the first time. So the main thing is just to show up and be adventurous, trying different foods and talking to strangers. People love to talk about themselves. If you can start the conversation with a question other than “What do you do for a living?”, you’ll be able to get a lot more interesting conversation out of whomever it is you’re talking to. 37 , it can bring in “I have this old, broken-down vehicle” or “I rode the bus with these crazy people who were laughing at silly jokes in the back.” It just opens up conversation. 38 ? If you can’t take their wine away, you should certainly try to take away their soapbox （讲台）. If you’re the host, you can ask them to help you in the kitchen with something and just remove them from the situation. 39 . And what about that other dinner-party killer: awkward silence? If you’re faced with an awkward silence at a dinner party, the only thing that always gets everyone talking again is to give the host a compliment（赞扬）. _ 40 . Just quickly turn around and say, “This cake is extremely delicious and you have to tell me all about it.” So being interesting at a dinner party isn’t that hard. A. How do you know the host B. The first step is to go exploring C. If you ask the question “How did you get here?” D. Be prepared to have awkward conversations with strangers E. Or turn the conversation into a topic where they have little to say F. What about that person who had too much to drink or won’t stop talking G. He or she is the person who is feeling the weight of that awkwardness the most 答案：BCFEG 【2021全国甲】 Swap, Don’t shop! You keep hearing about recycling, right? But it doesn’t end with bottles, cans, and paper. Clothing takes a huge amount of natural resources（资源）to make, and buying loads of new clothing（or throwing out old clothing）is not healthy for the environment. So what to do with all those perfectly-good-but-you’re-maybe-a-little-sick-of-them clothes piled on your bedroom floor? 16 . It’s the best way to get rid of your used clothes, score clothes from your friends, and have a party all at the same time. A successful swap depends on the selection of clothes, the organization of the event, and, obviously, how much fun is had. It’s really easy to do! Here are a few pointers. ●Invite 5—10 people so you have a nice selection. 17 , and there may not be enough things to choose from; more than that, and it becomes uncontrollable. ● 18 . They should also prepare plenty of reusable bags to carry their "new" clothes home. ●Put different types of clothing on different surfaces in the room. 19 . Place a few mirrors around your room so people can see how things look when they try them on. One of the ground rules of the swap should be that everyone must try on the clothes before they take them — things always look different when you put them on. ●Set a starting time. Maybe you say “go,” or turn on a certain song, or whatever. 20 . And don’t forget to put out some cookies and fruits. Remember, it’s a party! A. Less people than that B. Hold a clothing swap C. If two people are competing D. Just keep music playing throughout E. Donate whatever clothes are left over F. Have everyone put their clothes in the right spots G. Tell everyone to bring clean clothes in good condition 答案：BAGFD 变式训练： passage 1 （23-24高三上·广东梅州·期末）Getting and staying focused can be a challenge even in the best of times. But with everything going on in the world, concentrating can often feel down-right impossible. Below are some tips to help you find your flow. Distract (使分心) your brain. Schedule into every workday some breaks from all that focusing and allow your mind to travel into what’s called the “default (默认的) mode network” for a bit of freestyle activities. 66 . It’s the place where our minds find innovation and creativity and often make better decisions than the focused mind. 67 . This involves first turning your attention inward. Try traveling with your mind to someplace enjoyable — maybe it’s a walk through an imaginary forest or sunbathing on a warm sandy beach. Doing this several times a day can offer your mind a fresh approach to the job at hand. Block interruptions before diving into deep work. 68 . To help, turn off text messaging, notifications and social media alerts. Be vital when you want a deep dive into focus. Your important work benefits when you shut off or put away your phone and other screens. Know your body clock. Whether you are sharp in the morning or a night owl, don’t spend your day — in particular your peak brain hours — doing busywork. 69 . Try new hobbies. Engaging in hobbies not only is fun but can help us come up with new solutions to problems we’re facing at work or home. 70 . A．Try to daydream what happened B．We try to obtain focus but in vain C．Engage in positive constructive daydreaming D．Instead, reserve your best brain time for the big stuff E．This network of the brain circuit is where magic happens F．Our days are filled with distractions, from others and ourselves G．Allowing your mind time to play is another way to invite innovation 答案：ECFDG passage 2 （2024·福建泉州·二模）While most of us work hard to shine at the presentations and speeches we can prepare for, we may find impromptu (即兴的) communication scary. Actually, you just need to learn specific skills to communicate effectively when put on the spot. Here are a few pointers. 11 What do you want your audience to know? How do you want them to feel, and what do you want them to do? Having a clear objective paired with an awareness of your audience will narrow your focus. Then you can prioritize what to say and choose your exact words more wisely. Organize Your Thoughts. When making formal presentations, most people give a logical structure that audiences can easily follow. But few of us adequately organize thoughts in impromptu situations. 12 In fact, the best speakers maintain audience interest by demonstrating connections among specific points, ideas, for example. Listen as well as you talk. 13 You should do the opposite: focus on listening so that you can better understand the in-the-moment needs and interests of your conversation partners and respond more effectively. Paraphrasing or asking open-ended follow-up questions can help confirm your understanding and provide extra time to think about your response. Dare to be dull. Don’t feel you need to give a standout performance. One popular saying applies here, “ 14 ” Listeners are more likely to trust and approve of you when you speak like a human being rather than an actor or a robot. Research shows that the most effective speech includes moderate use of fillers such as “um” and “uh”. The real problem in impromptu communication isn’t an inability to communicate. 15 Fortunately, a measure of experimentation thought, and practice of the skills can make impromptu speaking opportunities your time to shine. A．Identify a communication goal. B．He knows most who speaks least. C．Don’t let the perfect be the enemy of the good. D．It’s being so nervous that we struggle with the talks. E．We may assume that it’s impossible to do so on the fly. F．A clear structure enhances comprehension and engagement. G．Most people obsess over what to say during impromptu encounters. 答案：AFGCD passage 3 （2024·湖南邵阳·三模）In the journey of life, there’s an often ignored hero — labor. Yes, that’s right, good old-fashioned hard work. Whether it’s mowing lawns, babysitting, or washing dishes, the act of laboring not only fills pockets but also shapes characters and molds futures. Let’s face it, we live in a world where instant satisfaction is the norm (标准). But what if we told you that delaying that satisfaction and putting in some good, honest sweat can actually be beneficial? It’s true! 16 17 Imagine a teenager tasked with mowing lawns for a summer job. Suddenly, they’re responsible for showing up on time, doing a thorough job, and managing their earnings. These are life skills that no classroom lecture can match. Moreover, labor breeds (培养) perseverance. 18 Instead of throwing in the towel, they persevere, learning from each setback and growing stronger in the process. This perseverance becomes a cornerstone (基石) for success in all aspects of life. But perhaps the most profound impact of labor is its ability to foster empathy and appreciation. 19 As teenagers serve meals to the less fortunate, they gain a newfound perspective on privilege and gratitude. Suddenly, that new smartphone doesn’t seem as important as lending a helping hand to those in need. In conclusion, labor isn’t just about earning a paycheck but it’s also about shaping character and building a foundation for success. So, the next time you see a teenager sweating it out on a hot summer day, remember — 20 A．Labour is significantly beneficial to health. B．Take, for instance, volunteering at a local soup kitchen. C．labor isn’t just about earning money and training skills. D．First, labor gradually acquires a sense of responsibility. E．Imagine a young adult facing rejection after rejection while job hunting. F．they’re not just mowing lawns, they’re paving their path to a brighter future. G．The process of laboring teaches invaluable lessons that textbooks simply can’t convey. 答案：GDEBF passage 4 （23-24高三下·海南省直辖县级单位·开学考试）Some of the oldest living things on our remarkable planet are trees. The record holders are bristlecone pines (狐尾松) of the western United States, quite a few of which are known to be more than 3,000 years old. One individual, discovered in 2012, is estimated to be more than 5,060 years old, making it the oldest known non-clonal tree in the world! 21 : individuals across a number of other tree species have also been around for thousands of years. So, how do trees survive for thousands of years? 22 . Undoubtedly, part of the answer lies in luck. Ancient trees have obviously not submitted to deadly diseases, pests, fires, droughts, windstorms, landslides, or the human axe in the centuries and centuries that they have quietly endured. The other part of the answer has to do with how trees age. In fact, there is quite a debate about whether ancient trees can be considered “immortal (永生的)”. That is, will such trees ever die if they are not killed by an outside force? We may never know the answer to that, but, at the very least, 23 . While cell death is an important factor in the aging of humans and other animals, one study found little evidence of cell death in the ginkgo tree vascular cambium (银杏树维管形成层). In addition, a study of bristlecone pine pollen (花粉) found no significant increase in mutation (变异) rates with age, which is another factor associated with animal aging. 24 . Older trees benefit greatly from having bodies made mostly of dead woody tissue. In fact, an old tree might be as much as 95 percent dead tissue! Given that it isn’t alive, wood does not require metabolic (新陈代谢的) activity to maintain it, 25 . A．so an old tree doesn’t really need to do much to keep living B．This is a question that has something to do with the good luck of trees C．However, bristlecones are certainly not alone in terms of the oldest creatures D．This is a fascinating question for biologists that does not yet have a settled answer E．What’s more, some ancient trees have superior chemical defenses against pests and diseases F．which means that trees can survive everywhere without being limited by external and internal conditions G．we know that ancient trees age in ways that are dramatically different from the ways that most animals and even other plants age 答案：CDGEA 1 学科网（北京）股份有限公司 $