Unit 2 Wildlife Protection 检测卷-【新课程能力培养】2026-2027学年高中英语必修第二册练习手册（人教版）

Also,a new column Reading Salon will be welcomed be- cause we all love reading but now we lack a platform where we can publish reviews of the books we've read. I would appreciate it if you could consider my sugges- tions. Yours, Li Hua 第二节读后续写（满分25分）】 Paragraph 1: Mr.Dawson sat in front of his house and looked seri- ous.Amy was afraid of the old man,too.She planned to pass his house quietly,but the old man with bad temper seemed a bit lonely.All of a sudden,Amy felt the old man Unit 2 第二部分阅读理解（共两节，满分50分） 第一节（共15小题，每小题2.5分，满分37.5分） A 21.C【解析】细节理解题。根据第一栏中的Daiy tasks部分中的“Clean the enclosure(围场)”可知，大 象志愿者们的任务是打扫大象的围场，来确保围场每天 都是干净的，故选C项。 22.C【解析】细节理解题。根据第二栏中How this vacation helps部分“There are only about600 gorillas left in the world as human activity has reduced the area where they can live.(由于人类活动使得它们的栖息地减少， 世界上只剩下大约600只大猩猩)”可知，人类活动使 得大猩猩栖息地变小，故选C项。 23.A【解析】细节理解题。根据第三栏中的Depar- tures部分“Every October and November groups of polar bears gather in Hudson Bay.As they are normally lonely creatures,this is unusual.The bears wait for the ocean to freeze so that they can hunt for seals,so this is the perfect opportunity to see them.(每年十月和十一月，成群的北 极熊聚集在哈德逊湾。因为它们通常是独居动物，所以 这很不寻常。北极熊等待海水结冰，这样它们就可以捕 猎海豹，所以这是观察它们的绝佳机会)”可知，北极 熊聚集在哈德逊湾狩猎，故选A项。 B 24.D【解析】主旨大意题。根据第一段第一句“… gray wolves were reintroduced to Yellowstone National Park.”和最后一段第一句“The government spent nearly 30 years coming up with a plan to reintroduce the wolves. 可知，文章主要介绍了黄石国家公园的灰狼消失后产生 的影响以及当地政府重新引入灰狼的计划，故选D项。 参考答案与解析。 was pitiful without a friend to talk to.She remembered a story about "an invisible smile"told by her grandmother. Her grandmother asked her to be friendly to others.She gathered all her courage and tried smiling.To her surprise, the old man smiled back Paragraph 2: Amy became encouraged and said hello to him.He was obviously amazed but after a short while he took an apple from his pocket.Amy thought it was the most delicious ap- ple in the world,for it was a sign of kindness and friend- ship.Smiles were influential.After that,Mr.Dawson smiled at Amy every time she passed by. 检测卷 25.C【解析】词义猜测题。根据第二段可知，在黄 石国家公园，灰狼曾经随处可见，但是到了20世纪20 年代，由于人类活动频繁，灰狼基本消失，它们迁徙到 了加拿大的森林深处，那里很少有人类活动。因此可推 测灰狼因为人类的发展被迫离开。force out意为“赶出 去”，与displace意思相近，故选C项。 26.A【解析】细节理解题。根据第三段可知，灰狼 的消失带来了很多意料之外的后果，鹿和麋鹿的数量激 增，它们消耗了大量的植被，破坏了公园里植物的多样 性，同时，丛林狼的数量也迅速增长，造成赤狐数量的 减少和河狸的消失。因此，灰狼的消失破坏了当地的生 态，故选A项。 27.B【解析】推理判断题。由文章最后一段最后一 句话中的a valuable experiment可推知，作者对黄石国 家公园的灰狼回归计划持赞同的态度，故选B项。 doubtful意为“怀疑的”；positive意为“赞同的”；dis approving意为“不赞成的”；uncaring意为“漠不关心 的”。 C 28.B【解析】细节理解题。由第一段中的“.stll alive,but has almost disappeared”可知，应选B项。 29.A【解析】推理判断题。第四段讲述了白鳍豚减 少的原因：它们是一种靠声音辨别方向的动物，随着住 在长江沿岸的人的增多，长江变得喧闹，它们就找不到 方向，找不到食物和同伴了，所以数量逐渐减少，故选 A项。 30.D【解析】推理判断题。白鳍豚数量减少最重要 的原因就是它们要依靠声音辨别方向，而人类活动把它 们所需要的宁静破坏了，最好的办法自然就是还给它们 原有的宁静环境一一建一片自然公园，当然不可能将整 81 高中英语必修第二册（人教版） 个长江建成自然公园，所以是一部分，D对C错：只需 把受伤的白鳍豚带回研究中心治疗，不是把每条都抓回 去，最适合它们的家还是长江，故A错：让许多人到长 江只会加剧白鳍豚灭亡而不是帮助它们，故B错。 31.C【解析】推理判断题。根据全文内容推知人们 可以采取措施来保护濒临灭绝的动物，故选C项。 32.B【解析】细节理解题。根据第二段第一句 "With such models,scientists have found out some key principles operating in food webs.”可知，应选B项。 33.C【解析】推理判断题。根据第二段第二句 “When a predator(掠食动物)always eats huge numbers of a single prey(猎物)，the two species are strongly linked.”可知，当一种掠食动物总是吃掉数量庞大的单 一种类的猎物时，这两种动物有较强关联；结合下文可 知，有较弱关联的两个物种，掠食动物有广泛的食物选 择、容易找到新的猎物，故排除A、B项。D项在文中 没有提及，也排除，故选C项。 34.D【解析】细节理解题。根据第三段第二句“In the 1960s,scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species-including species they did not directly attack.”可知，若一条食物链顶层的掠食动 物大规模减少，其他物种的数量将会经历意想不到的 改变，故选D项。 35.D【解析】细节理解题。根据最后一段第二句 "Ideally,the system would tell us when to adapt human ac- tivities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem bade from the borderline.”可知，预警系统是通过发出需要采取预防行 动的信号来帮助我们维护生态平衡的，故本题选D项。 第二节（共5小题，每小题2.5分，满分12.5分）》 本文是一篇说明文。讲述了科学家们对帝王蝶有了 更多的认识，这样能更好地保护这种可爱的生物。 36.B【解析】上文“Many animals move from one place to another at certain times of the year..(许多动物在 一年中的某些时候从一个地方迁移到另一个地方。)”介 绍了动物的迁徙现象，选项B“这种一年一度的运动被 称为迁徙。”承接上文，介绍这种现象的专业称谓，引 出下文“They migrate to find food,seek a partner,.orin search of warmer weather..(它们迁徙去寻找食物，寻找 伴侣或寻找更温暖的天气。)”提出它们迁徙的目的。选 项中movement和上文中move,选项中migration和下 文中migrate语义一致，故选B项。 37.D【解析】上文“Every autumn,millions of these beautiful insects begin a long and difficult journey.Some- 82 how they manage to travel around 4,000 kilometres south and find their way to California or Mexico.(每年秋天， 数以百万计的这些美丽的昆虫开始了漫长而艰难的旅 程。不知何故，它们设法南行了4000公里，找到了加 利福尼亚或墨西哥的路。)”说明这种昆虫迁徙的原因还 不知道，选项D“然而，直到最近才有人知道它们是如 何做到这一点的。”承接上文，转折语义，说明最近有 人知道原因，引出下文“A team of scientists has now found the answer.(一组科学家现在找到了答案。)”介绍 科学家发现了答案，故选D项。 38.C【解析】上文“They have found out that the monarch is able to tell the time of day.(他们发现帝王蝶 能够分辨一天中的时间。)”说明帝王蝶有分辨时间的能 力，选项C“它用眼睛来测量太阳的位置。”和上文并 列，说明帝王蝶有测量太阳的位置的能力，引出下文 "These two pieces of information-the time of day and the point where the sun is in the sky-allow the butterfly to determine the way to go.(这两条信息一一天中的时间 和太阳在天空中的位置一让这种蝴蝶决定要走的 路。)”是对以上两条信息的总结，说明依靠这两种能 力，这种蝴蝶就能决定迁徙的路线。选项中measure the position of the sun和下文the point where the sun is in the sky语义相关，故选C项。 39.F【解析】下文“Sady,human activity is the main reason why the number of monarch butterflies is falling.(可悲的是，人类活动是帝王蝶数量下降的主要 原因。)”说明因为人类活动造成帝王蝶的数量下降，选 项F“在过去的几年里，它的数量锐减了90%。”和下文 存在因果关系。选项中Its population has crashed by as much as 90 per cent和下文中the number of monarch but- terflies is falling语义相关，故选F项。 4O.G【解析】下文“People have been recording its migration and make sure that there are enough plants for it to feed on...the greater the chance it will survive and keep its place in the natural world for a long time to come.(A 们一直在记录它的迁徙，以确保有足够的植物供它食 用。如果这一方法奏效，帝王蝶的数量可能会再次增 加。我们对这种可爱的生物了解得越多，它就越有可能 存活下来，并在未来很长一段时间内保持它在自然界的 地位。)”说明人们对这种生物了解越多，就越有可能保 护好这种生物，选项G“然而，对帝王蝶行为的研究使 人们对这种生物有了更多的了解。”概括说明人们对这 种生物有更好的了解，引领本段，说明了解越多，越能 更好地保护，故选G项。 第三部分英语知识运用（共两节，满分30分）》 第一节（共15小题，每小题1分，满分15分） 41.D【解析】句意：每天都有物种在消失。根据上 句中的threatened及下文列举的濒危野生动物白枕鹤可 知，此处表示正在消失(disappearing),故选D。sur vive幸存；migrate迁徙；compete竞争。 42.B【解析】句意：所以科学家们在尽最大努力拯 救濒危物种。由下文提到的Chis和Tim拯救白枕鹤可 知，此处表示拯救。save.from拯救…免于，故选 B。kill杀死；determine确定；remove去除。 43.A【解析】句意：Emma,一只雌性白枕鹤，自 2004年来到这家动物园以后，就一直由他们照看。由下 文叙述可知，Chris和Tim一直在照顾Emma。in one's care由…来照看，故选A。eye眼睛；mind思维； mystery神秘的事物，奥秘。 44.C【解析】由下文的“become deeply attached to humans'”可知，Emma是由人类养大(raised)的，故选 C。find找到；choose选择；seize抓住。 45.B【解析】这导致了出乎意料的结果。此处指后 文描述的它无法正常繁殖后代这个后果(consequence), 故选B。effect影响；victory胜利；solution解决方法。 46.A【解析】Emma从来没把自己看作是只鹤。由 下文提到become deeply attached to humans可知，Emma 从来没把自己看成是白枕鹤，故选A。always总是， 直；occasionally偶尔；ever曾经。 47.B【解析】结合语境可知，Emma不把自己看作 是只鹤，自然会拒绝(refused)和雄鹤一起生活，故选 B。destroy毁灭；measure测量；recover恢复。 48.D【解析】它甚至会因为杀死一些雄鹤而出名 (have a reputation),故选D。gift天赋；skill技能； trend趋势。 49.D【解析】这使得它不可能成为母亲。Emma拒 绝与雄鹤一起生活，自然不可能繁殖，故选D。amazing 令人惊讶的；unbelievable难以置信的；important重要的。 50.C【解析】句意：然而，两位动物饲养员不想看 到这一珍稀物种灭绝。“它不可能成为母亲”与“这两 位动物饲养员不想看到这一珍稀物种灭绝”是转折关 系，故选C。therefore因此；moreover而且；instead代 替，而不是。 51.A【解析】他们成功地将人工繁殖和自然繁殖两 种繁殖方式结合了起来。combination结合，故选A。 collection收集；solution解决办法；accommodation住 宿，适应。 52.D【解析】句意：这种方式使Emma生了五只幼 鹤。enable sb.to do sth.使某人做某事，是固定搭配，故 选D。force迫使，强迫；forbid禁止；seek寻找。 53.C【解析】但在他们有把握(assured)之前，必 须做出更多的努力，故选C。defeated被击败的：grate 参考答案与解析。 ful感激的；tolerant容忍的。 54.D【解析】野生白枕鹤的数量在下降。on the decline在下降，在衰退，故选D。list清单；rise上升； increase增加。 55.C【解析】句意：毕竞(After all),不是每个人 都意识到了野生动物有思想，有感情。最重要的是，它 们有平等的生存权利。联系上下文可知，应选B。i contrast相比之下；by the way顺便提一下；on the con-- trary恰恰相反。 第二节（共10小题，每小题1.5分，满分15分） 56.intention【解析】考查名词。句意：中国西南部 云南省的一群野生亚洲象已经离开了它们的家，从它们 目前的旅行方向来看，这些动物无意返回。空处需填名 词作宾语。故填intention。 57.have covered【解析】考查动词时态。句意：到 目前为止，这些动物已经从它们的栖息地一一缅甸和老 挝边境附近的一个自然保护区一一跋涉了500公里。根 据时间状语“So far'”可知，使用现在完成时，主语为 the animals,助s动词用have。故填have covered。. 58.a【解析】考查冠词。句意：它们现在靠近一座 660万人口的城市。city为可数名词，此处表示泛指， 且city发音以辅音音素开头，需用不定冠词a修饰。故 填ao 59.months【解析】考查名词。句意：在过去的几 个月里，它们沿着高速公路，穿过农场。few修饰可数 名词复数形式。故填months。 60.to keep【解析】考查非谓语动词。句意：专家 们现在正在尽一切努力使大象远离昆明市。空处需填动 词不定式作目的状语，故填to keep。 61.hoping【解析】考查非谓语动词。句意：他们在 沿途设置障碍，希望能让它们回到自然保护区。分析句 子结构可知，已有谓语动词are setting up,空处需填非 谓语动词作状语，they和hope为逻辑主谓关系，需用 现在分词形式。故填hoping。 62.fom【解析】考查介词。句意：此外，当地村 民和政府密切关注大象，以保护它们不被猎杀。protect sb.from doing sth.为固定短语，意为“保护某人不受伤 害”。故填from。 63.wy【解析】考查宾语从句。句意：没有人知道 为什么这些动物会远离它们原来的栖息地。空处引导宾 语从句，从句缺少原因状语，需用连接副词wy引导。 故填why。 64.which【解析】考查定语从句。句意：原因之一 可能是保护区的食物供应不足，这可能会导致云南的大 象去寻找新的家园。空处引导非限制性定语从句，先行 词reason,指物，在定语从句中作主语，需用关系代词 83 高中英语必修第二册（人教版） which引导，that不能引导非限制性定语从句。故填 which。 65.rapidly【解析】考查副词。句意：另一个原因 是，由于当地的野生动物保护，这一地区的野生大象数 量迅速增加，从几年前的190头到今天的300多头。修 饰动词has increased,需用副词作状语。故填rapidly。 第四部分写作（共两节，满分40分） 第一节应用文写作（满分15分） Dear Sir or Madam, I'm writing to give some suggestions to protect the wildlife living in and around our city.As we know,many species of wildlife are in danger of extinction.This is be- cause the environment that they are living in has been de- stroyed greatly. With the development of cities,water and air are seri- ously polluted.Their living areas are becoming smaller and smaller.They not only have little to eat,but also can be killed by human beings.These species of wildlife are an im- portant part of our life.Personally,more measures should be taken to protect them from being hurt.Firstly,more laws must be made to stop people from cutting down trees. Se-condly,all the factories must clean the waste water be- fore it is poured into rivers or lakes.Thirdly,more reserves should be set up so that they can live safely. Unit 3 第二部分阅读理解（共两节，满分50分） 第一节（共15小题，每小题2.5分，满分37.5分） A 21.A【解析】细节理解题。根据第二段中的“I think a lot of people are using the rooms simply for personal conversations that no one else can understand.”可知，许 多人去聊天室聊天仅仅是为了私下谈话。故选A项。 22.C【解析】推理判断题。结合文章第二段有些人 上网聊天侮辱别人，以及文章最后作者建议我们提高交 流内容的质量，可知答案为C项。 23.D【解析】主旨大意题。根据文章最后可知，作 者建议我们要提高交流内容的质量，也就是在上网交流 时更加理智。故选D项。 B 24.A【解析】推理判断题。根据第一段中的“Experts are wondering if the Internet is changing what we remember and how.”可知，专家们想知道，互联网是否正在改变 我们的记忆，以及如何改变我们的记忆。这是本文的中 心话题。因此推断，作者使用两个问句是为了引出要讨 84 I hope my suggestions are of much help. Yours sincerely, Li Hua 第二节读后续写（满分25分） Paragraph 1: Suddenly,the huge Doberman broke loose and rushed toward me.I found myself pinned against the wall in amaze- ment.To my surprise,the dog stood on his legs,his front paws on my shoulders,washing my face with joyful and abundant kisses!His owner came to me and told me that he was the dog we had saved one year ago.More than ex- cited to see him again in such good health,I hugged him tightly,determined to become a good vet technician at that moment. Paragraph 2: I went on to be a vet technician for 14 years,and since retirement.I've volunteered at a no-kill animal shelter.Be- ing a vet technician and a volunteer at the no-kill animal shelter,I succeeded in saving more animals,which often made me think of the grateful huge Doberman.Although many years have passed,I still shed tears in amazement at the display of love and gratitude the dog had for me.All the dogs knew they had been rescued by me and they were grateful to me. 检测卷 论的话题。故选A项。 25.C【解析】细节理解题。根据第二段中的“Peo ple in the first group knew they could find the information again,so they did not try to remember it.”可知，第一组没 有记信息。故选C项。 26.D【解析】细节理解题。根据倒数第二段中的 "Rather,they remember how to find it.This is called 'trans- active memory'.”可知，交互记忆引导人们记住怎样找 到信息。故选D项。 27.A【解析】细节理解题。根据最后一段中的“。 but there is no doubt that the way we use memory is chang- ing.”可知，互联网对人们的记忆产生的影响是它改变 了我们使用记忆力的方式。故选A项。 C 28.C【解析】代词指代题。them指代上文中的名 词复数形式，上文的复数名词有reviews和buyers,.再 根据下文的关于网上评价未必都和事实相符的例子可 知，故选C项。 29.B【解析】推理判断题。Barnaby Bicken选择了N Unit2检测卷 第一部分听力（略） 第二部分阅读理解 第一节 阅读下列短文，从每题所给的四个选项 (A、B、C和D)中，选出最佳选项。 A Elephant reserve Country:Thailand This is a working vacation at a wildlife centre. Anyone can become a volunteer if he/she agrees to help the elephant keepers with tasks. Daily tasks Gather the elephants at 6:30 a.m..Take them to look for food in the forest.Clean the enclosure )Swim with the elephants in the lake in the afternoon.If volunteers want to relax after work, they can watch satellite television. How this vacation helps If these elephants hadn't been rescued,they would still be living on the streets of Bangkok.The rural environment is much better for them than the urban environment where there is lots of pollution. Gorilla safari Countries:Kenya,Rwanda and Uganda Departures(出发)：2-3 departures per month from Aug.to Dec. If you're lucky,you'll see lions,elephants and rhinos during this safari.The highlight of the trip is the opportunity to see gorillas in the mountain forests.However,you must be in good health-if a gorilla caught a cold,it would be extremely harmful to its whole family. How this vacation helps There are only about 600 gorillas left in the world as human activity has reduced the area where they can live.When you buy a ticket,this will pay for the protection of the national park. Unt2检测卷。 Polar bear watching Area Country:Arctic,Canada Departures:sixty trips between Oct.1-Nov.19. Every October and November groups of polar bears gather in Hudson Bay.As they are normally lonely creatures,this is not usual.The bears wait for the ocean to freeze so that they can hunt for seals,so this is the perfect opportunity to see them. How this vacation helps If the Arctic ice cap melts due to global warming, polar bears will be in danger.We give a share of our profits to the charity that protects polar bears. )21.Which of the following is the task for elephant volunteers? A.Teach the elephants to swim in the lake. B.Take a bath for the elephants at 6:30a.m C.Make sure the enclosure is clean every day. D.Watch satellite television to learn knowledge about ele- phants. )22.What do we know about the gorilla safari? A.You can set off in April to see gorillas. B.You will see lions,elephants and rhinos. C.Human activities have made the gorilla living area smaller. 9 N 高中英语必修第二册（人教版） D.To see lions in the mountain forests is the best part of the trip. ()23.What do we know about polar bears? A.Polar bears gather in Hudson Bay to hunt B.Seeing polar bears in groups is not unusual. C.December can be the best time to see polar bears. D.The charity will use the profits to deal with global warming. B After years of heated debate,gray wolves were reintroduced to Yellowstone National Park.Fourteen wolves were caught in Canada and transported to the park.By last year,the Yellowstone wolf population had grown to more than 170 wolves. Gray wolves once were seen here and there in the Yellowstone area and much of the continental United States,but they were gradually displaced by human development. By the 1920s,wolves had practically disap- peared from the Yellowstone area.They went farther north into the deep forests of Canada, where there were fewer humans around. The disappearance of the wolves had many unexpected results.Deer and elk populations-一major food sources(来源)for the wolf-grew rapidly.These animals consum- ed large amounts of vegetation(植被)，which 10 reduced plant diversity in the park.In the absence of wolves,coyote populations also grew quickly.The coyotes killed a large percentage of the park's red foxes,and completely drove away the park's beavers. As early as 1966,biologists asked the government to consider reintroducing wolves to Yellowstone Park.They hoped that wolves would be able to control the elk and coyote problems.Many farmers opposed the plan because they feared that wolves would kill their farm animals or pets. The government spent nearly 30 years coming up with a plan to reintroduce the wolves.The U.S.Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone.Today,the debate continues over how well the gray wolf is fitting in at Yellowstone.Elk,deer,and coyote populations are down,while beavers and red foxes have made a comeback.The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well. )24.What is the text mainly about? A.Wildlife research in the United States. B.Plant diversity in the Yellow- stone area. C.The conflict between farmers and gray wolves. D.The reintroduction of wolves to Yellowstone Park. ()25.What does the underlined word “displaced”in Paragraph2mean? A.Tested. B.Separated. C.Forced out. D.Tracked down. ()26.What did the disappearance of gray wolves bring about? A.Damage to local ecology. B.A decline in the park's income C.Preservation of vegetation. D.An increase in the variety of animals. ()27.What is the author's attitude to- wards the Yellowstone wolf pro- ject? A.Doubtful. B.Positive. C.Disapproving. D.Uncaring. 0 One animal which is still alive,but has almost disappeared from the world,is the Chinese river dolphin or baiji. The baiji is a beautiful animal with a graceful body and a long nose.It is blue-grey with a white underside,weighs between 100 and 160 kilogrammes,and can grow up to eight feet long.It lives in the middle and lower parts of the Yangtze River.Most dolphins live in the sea so the baiji is very unusual.It is one of only five kinds of river dolphins in the world. Unt2检测卷。 In the past,the Yangtze River was home to many thousands of baiji.A book written during the Han Dynasty,22 centuries ago,tells of the river being full of the beautiful creatures.At that time,there were many stories about the baiji.One story said that the dolphin was really a beautiful princess who had drowned in the river.Another said it was a kind of horse that could gallop(急速行进) across water. Sadly,the situation today is very different. Many millions of people live in the Yangtze River Basin and the river is busy,noisy and polluted.The baiji is almost blind and moves around using sounds.With so many boats and people using the river,the animals cannot find their way around.They are unable to find food,or find each other.Year by year,the number of baiji in the river becomes smaller and smaller. A lot of work is being done to help the baiji.One section of the river has been made into a kind of nature park,where the baiji can be safe.Fishermen work together with scientists and tell them when they see a baiji, or if they find an injured one.Injured animals are taken to a research center and nursed back to be healthy.However,in spite of these measures,scientists estimate(估计)that the number of the baiji still alive in the river may be less than 100.If things continue as they are,the lovely creature will disappear in the next 25 years. 11 N 高中英语必修第二册（人教版） )28.Which description about the baiji is WRONG? A.It is blue-grey with a white underside. B.It has already died out from the world. C.It is one of only 5 kinds of river dolphins in the world. D.It lives in the middle and lower parts of the Yangtze River. ()29.The reasons why the baiji is disa- ppearing are the following EXCEPT A.the baiji is blind because of the pollution and can't find the way around B.they are unable to find food or find each other by sounds since the river is noisy C.many millions of people live in the Yangtze River Basin,mak- ing there noisy and polluted D.the boats and people are noisy, making the animals cannot find their way around by sounds ()30.Which of the following is the correct way to save the baiji? A.Catch the baiji and take them to the research center. B.Ask many people to come to the river to help the baiji. C.Make the whole Yangtze River a nature park for the baiji to 12 live in. D.Make one section of the river a nature park where the baiji can be safe. ( )31.What can we learn from the pass- age? A.There are more baiji living in a nature park now. B.The animals dying out are being hunted by human beings. C.People can take some measures to save the animals dying out. D.People like to live in the Yang- tze River Basin with animals swimming in the river. 0 How does an ecosystem(生态系统) work?What makes the populations of different species the way they are?Why are there so many flies and so few wolves?To find an answer,scientists have built mathematical models of food webs,noting who eats whom and how much each one eats. With such models,scientists have found out some key principles operating in food webs.Most food webs,for instance,consist of many weak links rather than a few strong ones.When a predator(掠食动物)always eats huge numbers of a single prey(猎物)， the two species are strongly linked;when a predator lives on various species,they are weakly linked.Food webs may be dominated by many weak links because that arrangement is more stable over the long term.If a predator ret can eat several species,it can survive the extinction of one of them.And if a predator can move on to another species that is easier to find when a prey species becomes rare,the switch allows the original prey to recover.The weak links may thus keep species from driving one another to extinction. Mathematical models have also revealed that food webs may be unstable,where small changes of top predators can lead to big effects throughout entire ecosystems.In the 1960s,scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species-including species they did not directly attack. And unplanned human activities have proved the idea of top-down control by top predators to be true.In the ocean,we fished for top predators such as cod on an industrial scale,while on land,we killed off large predators such as wolves.These actions have greatly affected the ecological balance. Scientists have built an early-warning system based on mathematical models.Ideally, the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key,scientists say because once ecosystems pass their tipping point(临界 点)，it is remarkably difficult for them to Unt2检测卷。 urn. )32.What have scientists discovered with the help of mathematical models of food webs? A.The living habits of species in food webs. B.The rules governing food webs of the ecosystems. C.The approaches to studying the species in the ecosystems. D.The differences between weak and strong links in food webs. )33.A strong link is found between two species when a predator A.has a wide food choice B.can easily find new prey C.sticks to one prey species D.can quickly move to another place )34.What will happen if the populat- ions of top predators in a food web greatly decline? A.The prey species they directly attack will die out. B.The species they indirectly at- tack will turn into top predators. C.The living environment of other species will remain unchanged. D.The populations of other species will experience unexpected changes. )35.How does an early-warning system help us maintain the ecological 13 N 高中英语必修第二册（人教版） balance? A.By getting illegal practices un- der control. B.By stopping us from killing large predators. C.By bringing the broken-down ecosystems back to normal. D.By signaling the urgent need for taking preventive action. 第二节 阅读下面短文，从短文后的选项中选出 可以填入空白处的最佳选项。选项中有两项 为多余选项。 Many animals move from one place to another at certain times of the year.36. They migrate to find food,seek a partner, or in search of warmer weather.One of the most wonderful migrations in nature is that of the North American monarch butterfly(帝王 蝶). Every autumn,millions of these beautiful insects begin a long and difficult journey. Somehow they manage to travel around 4,000 kilometres south and find their way to California or Mexico.37. A team of scientists has now found the answer.They have found out that the monarch is able to tell the time of day.38. These two pieces of information-the time of day and the point where the sun is in the sky- allow the butterfly to determine the way to go. Eventually,it manages to reach the places where it will spend the winter. 14 The solution to the mystery of the monarch's amazing ability comes at a time when it is in serious trouble.39. Sadly,human activity is the main reason why the number of monarch butterflies is falling.In many of the places where the butterfly can be found,people are destroying the natural environment.They cut down trees and use chemicals that kill the plants that monarch caterpillars eat. 40. People have been recording its migration and make sure that there are enough plants for it to feed on.If this works, there may come a time when the number of monarch butterflies increases once again.The more we know about this lovely creature,the greater the chance it will survive and keep its place in the natural world for a long time to come. A.They begin to return north in the spring. B.This annual movement is called migration. C.It uses its eyes to measure the position of the sun. D.However,until recently no one knew how they did this. E.The most common type of migration is seasonal migration. F.Its population has crashed by as much as 90 per cent in the last few years. G.The research on the monarch's behavior has however led to a greater awareness of this creature. 第三部分英语知识运用 第一节完形填空 阅读下面短文，从短文后各题所给的四 个选项(A、B、C和D)中，选出可以填入 空白处的最佳选项。 Wildlife has been greatly threatened in the modern age.There are species(物种) that are 41 every day.The white-naped crane is a typical example.So scientists are trying their best to 42 the species from going out of existence. Chris and Tim work at a zoo,helping endangered cranes with their reproduction )Emma,a female crane,has been in their 43 since she arrived in 2004. Born at an international crane foundation Emma was 44 by human caretakers.This led to an unexpected 45,though she had a wonderful time there.Emma had 46 taken herself as a crane and become deeply attached to humans.She 47 to live with male cranes, and even had a 48 for killing some of them,which made it 49 for her to become a mother. 50,the two zookeepers didn't want to see the extinction(灭绝)of this precious species.With their patience and efforts,they successfully developed a 51 of artificial breeding(人工繁殖)and natural reproduction. This 52 Emma to give birth to five baby cranes. The two keepers are proud of their pro- ductive work.But before they can be 53, Unt2检测卷。 more efforts must be made,because the population of the crane in the wild is on the 54,and many other species appear headed toward extinction.55,not everyone has realized that wildlife has thoughts,feelings, and most importantly,equal rights to survive. ）4l.A.surviving B.migrating C.competing D.disappearing ( ）42.A.kil B.save C.determine D.remove ）43.A.care B.eye C.mind D.mystery )44.A.found B.chosen C.raised D.seized )45.A.effect B.consequence C.victory D.solution (）46.A.never B.always C.occasionally D.ever )47.A.destroyed B.refused C.measured D.recovered ( ）48.A.gift B.skill C.trend D.reputation ( ）49.A.amazing B.unbelievable C.important D.impossible ）50.A.Therefore B.Moreover C.However D.Instead ）5l.A.combination B.collection C.solution 15 N 高中英语必修第二册（人教版） D.accommodation ( ）52.A.forced B.forbade C.sought D.enabled (）53.A.defeated B.grateful C.assured D.tolerant (）54.A.list B.rise C.increase D.decline ()55.A.In contrast B.After all C.By the way D.On the contrary 第二节 阅读下面短文，在空白处填入1个适当 的单词或括号内单词的正确形式。 A herd of wild Asian elephants in Southwest China's Yunnan Province has been away from its home,with its current direction of travel showing the animals have no 56. (intend)of returning. They are now approaching the Chinese city of Kunming.So far,the animals 57. (cover)500 km from their habitat in a nature reserve near the borders with Myanmar and Laos altogether.And they are now near 58. city of 6.6 million people.They have travelled along highways and through farms over the past few 59. (month). And their journey has been attracting the attention of the Chinese public. Experts are now doing all they can 60. keep)the elephants away from Kunming city.They are setting up barriers along the way,61. (hope) 16 to get them to go back towards the nature reserve. Besides,local villagers and government keep watch on the elephants closely to protect them 62. being hunted. No one knows 63. the animals have walked so far away from their original habitat.One reason could be the lack(缺乏) of food supplies in their reserve,64. may cause the elephants in Yunnan to go out for new homes.Another reason is that the number of the wild elephant population in this area has increased 65. (rapid)due to the local wildlife protection,from nearly 190 years ago to more than 300 today. 第四部分写作 第一节应用文写作 假如你叫李华，你所生活的城市周围有 很多动植物正逐渐减少，请你对此现象向有 关部门写一封信，分析造成这种现象的原 因，并根据实际情况提出几条切实可行的建 议。以下几条要点需包括在内： 1.野生动植物的现状； 2.分析造成许多野生动植物濒临灭绝的 原因； 3.提出几条保护野生动植物的具体措施。 注意： 1.不可遗漏要点，可适当增加细节，以 使行文连贯； 2.词数80左右，开头和结尾已给出， 不计入总词数。 Dear Sir or Madam, I'm writing to give some suggestions to protect the wildlife living in and around our city. I hope my suggestions are of much help. Yours sincerely, Li Hua 第二节读后续写 阅读下面短文，根据所给情节进行续 写，使之构成一个完整的故事。 I took a job as a receptionist for a veterinarian(兽医)almost five decades ago. As an enthusiastic animal lover,I accepted the position on condition that I wouldn't have to assist with any wounded animals.I couldn't bear to see any creature in pain.At the end of my first week,we were closing the office for the day when a young man ran up to us holding a severely injured Doberman puppy in his arms and begging us to save his life.The four-month-old pup had been hit by a car. The doctor and I ran back into the operating room.The only place the skin was still attached to this poor little animal's body was around one shoulder.The vet worked Unt2检测卷。 tirelessly for what seemed like hours,stitching (缝合)him back together again.That was the easy part.The puppy had broken multiple bones,including his spine(脊柱).Even if he survived the next few days,we were quite sure he would never walk again. That day forever changed my life.The veterinarian guided me,and I became his assistant in all things.One of my first jobs was to give that Doberman puppy daily physical care.I remembered moving his tiny legs to try to keep his muscles from withering (菱缩).Weeks went by until one day,I felt this little fighter push back ever so slightly. And he continued to push back till he could finally use his legs.He recovered. A year later,I walked into the clinic's waiting room and saw a huge Doberman who had been standing quietly with his owner on the opposite side of the room.I called the name of the next client. 注意：续写词数应为150左右。 Paragraph 1: Suddenly,the huge Doberman broke loose and rushed toward me. 17 N 高中英语必修第二册（人教版） Paragraph 2: I went on to be a vet technician for 14 years,and since retirement,I've volunteered at a no-kill animal shelter. (18