1、The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (大气；大气层) trap energy from the sun. Without these gases， heat would escape back into space and Earths average temperature would be about 60F colder. Because of how they warm our world，t
2、hese gases are referred to as greenhouse gases.Have you ever seen a greenhouse？ Most greenhouses look like a small glass house. Greenhouses are used to grow plants， especially in the winter. Greenhouses work by trapping heat from the sun. The glass panels (面，板) of the greenhouselet in light butkeep
3、heat fromescaping. This causes the greenhouse to heat up， much like the inside of a car parked in sunlight， and keeps the plants warm enough to live in the winter.The Earths atmosphere is all around us. It is the air that we breathe. Greenhouse gases in the atmosphere behave much like the glass pane
4、s (窗玻璃) in a greenhouse. Sunlight enters the Earths atmosphere， passing through the blanket of greenhouse gases. As it reaches the Earths surface， land， water， and biosphere (生物圈) absorb the sunlights energy. Once absorbed， this energy is sent back into the atmosphere. Some of the energy passes back
5、 into space， but much of it remains trapped in the atmosphere by the greenhouse gases， causing our world to heat up.The greenhouse effect is important. Without the greenhouse effect，the Earth would not be warm enough for humans to live. But if the greenhouse effect becomes stronger， it could make th
6、e Earth warmer than usual. Even a little extra warming may cause problems for humans， plants， and animals.Section_Warmup_&_Lesson_1_PrereadingCan we take the heat?In the last few decades， scientists have reached consensus and reported that human beings are causing changes in the Earths climate somet
7、hing previously seen as beyond ourcontrol. They claim that in the last 50 years, gases pumped into the Earths atmosphere by the factories and vehicles have been speeding up the process of global warming and affecting our climate.Looking ahead， scientists believe that global warming could be one of t
8、he biggest environmental problems facing the 21st century. But what exactly is global warming, why is it seen as a danger， and how is it relevant to our lives?Global warmingrefers to an average increase in the Earths temperature that, in turn，leads to climate change. Scientists found that the temper
9、ature of the Earth is controlled by greenhouse gases such as carbon dioxide which trap heat from the sun in the Earths atmosphere. Without these naturally occurring gases, the suns rays would bounce back into space leaving the Earth cold and impossible to live on. When the presence of these gases in
10、 the atmosphere increases, however, more heat is trapped and the Earths temperature rises.in the last/past few decades/years/months/days此类短语，通常与现在完成时连用。in也可换成over或during。本段和第三段均含有此类结构。consensus/knsenss/n.一致的意见seen as beyond our control是过去分词短语作定语，修饰something。beyond ones control 超出的控制，不受的控制claim/kleIm
11、/vt.声称pump into注入speed up 加快速度 look ahead 展望未来现在分词短语facing the 21st century作后置定语，修饰the biggest environmental problems。be seen as 被看作danger nC“危险的人，危险的事物”。在文中为抽象名词具体化。relevant/relvnt/adj.有关的be relevant to 与相关，切题refer/rIf/(to)指，意即average adj.平均的；普通的，一般的in turn 依次in return 作为回报lead to 引起，导致that, in tur
12、n, leads to .是that引导的定语从句，修饰an average increase in the Earths temperature。which trap heat from the sun . 是which引导的定语从句，修饰先行词greenhouse gases。ray/reI/n.光线 bounce/bans/vi.反弹Without . gases是without引出的含蓄虚拟条件，the suns rays would bounce .是与现在事实相反的虚拟语气，其中leaving .是现在分词短语作结果状语。我们受得了这么热吗？第12段译文在过去的几十年里，科学家们一
13、致认为，人类正在造成地球气候的变化这是一种原来被认为是超出我们控制能力的现象。他们声称，在过去的50年里，工厂和车辆排入地球大气层中的气体加速了全球变暖的进程，影响了我们的气候。展望未来，科学家们认为全球变暖可能是21世纪面临的最严重的环境问题之一。但是，确切地说，什么是全球变暖？为什么把它视为一种危险？它如何与我们的生活相关呢？全球变暖指的是地球温度平均增长，继而导致气候变化。科学家们发现地球的气温受温室气体如二氧化碳的控制，这些气体能将来自太阳的热量留在地球的大气层里。如果没有这些自然产生的气体，太阳光线将会被反射回太空中去，地球将处于寒冷之中，生命也就不可能在地球上存在。然而，当大气层中
14、的这些气体的浓度不断增加时，更多的热量被留在地球，造成地球气温上升。Over the last 100 years, the global average temperature has increased by 1F and many experts insist that the blame for this global warming can mostly be pinned on human activities. As a result of increased industry, agriculture， the cutting down of forests, the incr
15、ease in transport and the burning of fuels, nearly 6 tonnes of carbon dioxide goes into the atmosphere every year for every one of the Earths 6 billion people. The amount of carbon dioxide in the atmosphere has risen by more than 30% in the last 250 years with half of this increase occurring since 1
16、960. Given this data, it seems that the link between human activities and rising global temperatures is not merely a coincidence.A temperature increase of 1F may not sound like a lot, but if we continue to produce carbon dioxide and other gases in such huge quantities， we are condemning life on Eart
17、h and should expect severe consequences. Recent reports warned that global warming will cause terrible climate changes including more frequent flooding, heat waves and droughts. Serious diseases will spread and industries that rely on nature such as fishing will be badly affected. Increased temperat
18、ures will also cause the polar ice to melt, raising sea levels and flooding many islands and cities. How can we stop these disasters from happening?Governments all over the world have a responsibility to reduce the amount of carbon dioxide which their countries are producing. If less carbon dioxide
19、goes into the atmosphere, global warming will slow down. This is no easy task, however, and some governments, for example, the USAs federal government, express reservations about whether global warming is really caused by human activities. Many people believe that they are simply not prepared tosacr
20、ifice the amount of money they make from industry to save the Earth. But why wait around for governments to take action？ Experts advocate that each person play their part. They suggest making small changes like taking public transport, recycling， using lowflow shower heads, and buying light bulbs th
21、at use less energy. Even simple things like using recycled paper or switching off the lights when you leave a room can help. If we add up all these small changes made by everyone worldwide， they wont be such small changes. They could be the changes that save our future. After all， theres no substitu
22、te for our Earth. Its all weve got to live on.insist vt. 作“坚持认为”讲时，后面所跟的宾语从句用陈述语气；作“坚决要求”讲时，后面所跟的宾语从句要用虚拟语气。pin/pIn/(on)把责任加在(某人)身上pin blame on 归咎于，归罪于as a result of 作为的结果，因为agriculture/grIklt/n.农业given prep.鉴于，考虑到coincidence/kInsIdns/n.巧合in huge quantities 大量condemn/kndem/vt.迫使(某人)陷于不幸的境地consequenc
23、e n结果，后果drought/drat/n.旱灾raising . and flooding .是现在分词短语作结果状语，表示冰融化的结果。stop . from doing sth. 阻止做某事，from可以省略。federal/fedrl/adj.联邦的reservation/rezveIn/n.保护whether global warming is . 是介词about的宾语。介词后用whether不用if。be prepared to do sth.准备做某事，相当于be ready to do sth.。sacrifice/skrIfaIs/vt.&vi.牺牲；献出make mon
24、ey 挣钱，赚钱，还可换成earn money。take action 采取行动advocate/dvkeIt/vt.主张，提倡play ones part起到某人的作用suggest doing sth. 建议做某事suggest 后不接动词不定式。recycle/risaIkl/vt.回收利用switch off 关闭，相当于turn off。help vi.有帮助，有用made by everyone worldwide是过去分词短语作后置定语，修饰changes。after all 毕竟，终究substitute/sbstItjut/n.代替品，代用品后接介词for，表示“的代替者/替
25、代品”。live on 以为生，以为主食；住在上，生存在上weve got to live on是定语从句，修饰all，作宾语的关系代词已被省略。all thatwhat。第35段译文在过去的100年里，全球的平均温度上升了1华氏度，许多专家坚持认为，在很大程度上，人类的活动是导致全球变暖的重要原因。随着工业、农业规模的不断扩大，成片成片的森林被砍伐，交通运输日益频繁，燃料消耗不断增长，每年有接近6吨的二氧化碳被释放到供地球上60亿人中的每一个人呼吸的空气当中。在过去的250年里，大气中的二氧化碳含量已经增加了30%以上，而其中的一半是在1960年以后增加的。考虑到这一数据，人类活动与正在上升
26、的全球温度之间的关联似乎不仅仅是一个巧合。气温升高1华氏度也许听起来无关紧要，但是如果我们继续制造如此多的二氧化碳和其他气体，我们将毁灭地球上的生命，后果将非常严重。近期的报告警告说，全球变暖将导致气候急剧变化，包括更加频繁发生的洪水、热浪和干旱。严重的疾病将四处扩散，自然产业如渔业将会受到严重的影响。温度升高还会引起极地冰山融化，海平面上升，从而淹没许多岛屿和城市。我们怎样才能防止这些灾难发生呢？世界上的每一个政府都有责任降低自己国家二氧化碳的排放量。如果少向大气中释放二氧化碳，全球变暖就会慢下来。然而，这是一项非常艰巨的任务，一些政府，例如美国的联邦政府，对于全球变暖是否真的是由人类活动引
27、起的仍持保留意见。许多人认为他们只是不愿意牺牲自己从工业中赚到的钱来拯救地球。但是为什么要等待政府来采取行动呢？专家主张每个人都发挥作用。他们建议做一些小小的改变，比如搭乘公共交通工具，循环利用(资源)，使用节水沐浴龙头，购买节能灯泡。甚至是一些非常简单的事情，如使用再生纸或离开房间时关上灯，都会有用。如果把全世界每个人做的小小改变累加起来，它们就不是小改变了，而是拯救我们未来的改变。毕竟，我们的地球是不可替代的，它是我们必须赖以生存的全部。PrereadingPlease match the words with their proper meanings.1consultantAa mor
28、al rule or set of ideas which makes you behave in a particular way2substitute Bto refuse to buy something, use something, or take part in something as a way of protesting3principle Can expert who gives advice4boycott Dsomeone or something you use instead of the person or thing you would usually use5
29、relevant Eto willingly stop having something you want or doing something you like in order to get something more important 6.condemn Fto publicly support a particular way of doing things7recycle Gto put used objects or materials through a special process so that they can be used again8advocate Hto s
30、ay what sb.s punishment is to be; to sentence sb. (esp. to death)9sacrifice Iconnected with the subject or problem being discussed or considered10trap Jto prevent someone from escaping from a dangerous place答案：15CDABI610HGFEJLeadinAs we all know, the earth is becoming warmer. Global warming can brin
31、g about many terrible disasters, such as droughts and mountain fires. Look at these pictures and match them with A、B、C、D or E.AhurricaneBdroughtCmountain firesDflood Eglaciers melting1_C_ 2._E_ 3._A_4._D_ 5._B_WhilereadingFastreadingRead the text and answer the following questions.1Whats the main pu
32、rpose of the first paragraph?To_introduce_the_topic_of_global_warming_to_the_readers.2The main idea of the last paragraph is that everyone_should_try_their_best_to_save_energy_and_reduce_greenhouse_gases.3What does the passage mainly tell us?The_causes_of_global_warming_and_the_measures_we_should_ta
33、ke_to_deal_with_it.Carefulreading()Read the text and choose the best answers.1What can we learn from the passage?AThe rapid development of our society mainly leads to global warming.BMost people are not aware of the importance of protecting our environment.CEvery person has the responsibility to red
34、uce the producing of carbon dioxide.DThe activities of human beings causing global warming may be just a coincidence.2What would the earth be like if there were no greenhouse gases?AThe earth will be very hot all day and night.BIt will be impossible to live for people because of the cold planet.CWat
35、er will ran out and all animals will die out.DThe earth will be the same as it is.3The following activities can lead to global warming EXCEPT _.Athe increase in transport and industryBthe increase in the burning of fuelsCthe cutting down of forestsDmore and more natural disasters4According to the pa
36、ssage, which one is FALSE?AOver the past 100 years, the global average temperature has increased by 1F.BSome people are not active in protecting our earth.CThe fishing industry will be badly affected because of global warming. DThere seems to be no direct link between human activities and rising glo
37、bal temperatures.答案：14CBDD()Read the text carefully and then fill in the chart with the information in the text.It is reported that Earths climate is being changed and human will face global 1.warming in the 21st century.What is global warming？It refers to an average increase in the Earths 2.tempera
38、ture that, in turn, leads to climate change.Why is global warming seen as a danger, and how is it relevant to our lives？The global average temperature has increased by 1F over the last 100 years 3.because of human activities. If the 4.situation continues, we are condemning life on Earth and should f
39、ace terrible climate changes, serious diseases and bad 5.effects on some industries as well as the 6.rising sea levels.How can we stop these disasters from happening？7.Governments all over the world have a responsibility to 8.reduce the amount of carbon dioxide 9.produced by their countries. Everyon
40、e worldwide can play their part by making small 10.changes in the daily life.StudyreadingAnalyze the following difficult sentences in the text.1Without these naturally occurring gases, the suns rays would bounce back into space leaving the Earth cold and impossible to live on. 句式分析尝试翻译如果没有这些自然产生的气体，
41、太阳光线将会被反射回太空中去，地球将处于寒冷之中，生命也就不可能在地球上存在。2A temperature increase of 1F may not sound like a lot, but if we continue to produce carbon dioxide and other gases in such huge quantities, we are condemning life on Earth and should expect severe consequences.句式分析尝试翻译气温升高1华氏度也许听起来无关紧要，但是如果我们继续制造如此多的二氧化碳和其他气体
42、，我们将毁灭地球上的生命，后果将非常严重。3They suggest making small changes like taking public transport, recycling, using lowflow shower heads, and buying light bulbs that use less energy.句式分析句子主干是they suggest making small changes；介宾短语like taking .作后置定语；四个并列的动名词(短语)作介词like的宾语；定语从句that use less energy修饰先行词light bulbs。尝
43、试翻译他们建议做一些小小的改变，比如搭乘公共交通工具，循环利用(资源)，使用节水沐浴龙头，购买节能灯泡。.阅读理解ADear Headteacher Jones，Recently I took a trip with my family to a local botanical garden (植物园), Natural Springs. It was amazing how drawn we were to the breathtaking varieties of plants and flowers. Although I realize that we cannot turn our
44、school into such a garden, we can surely add more beauty to its surroundings.I know that purchasing plants for landscaping is expensive, so I suggest that we try my plan. Many homes and apartments in our neighborhood have a lot of landscaping. I have learned that many of these plants must be divided
45、 and transplanted each year, otherwise they will become overgrown. During the spring, people could swap plants from their own gardens; they could also bring some plants to donate to our school. It would be a wonderful opportunity for community members to visit our school and get some different plant
46、s here to improve the look of their own yards.I have talked to many students who would like to form a garden club and care for the plants. Mrs. Meer, chair of the biology department, has agreed to supervise (监督) us. The club members would take turns to care for the plants both before and after schoo
47、l. All who attend and visit our school will most likely appreciate the benefits of my project. If you agree to allow us to put my plan into action, I can guarantee that you will be pleased.Please let me know when we can discuss this further.Sincerely，Terri Olsen语篇解读：本文是应用文。作者通过此信旨在说服校长举办植物交换活动，以此引进更
48、多的植物来美化校园。1The authors suggestion is to _.Ado a plant swapBbuy some plantsCgive a donation Djoin a garden club解析：选A细节理解题。由第二段中的“During the spring, people could swap plants from their own gardens”可知A项说法正确。2As for the authors suggestion, Mrs. Meer might feel _.Adoubtful BcautiousCpositive Dcurious解析：选
49、C推理判断题。由第三段中的“Mrs. Meer, chair of the biology department, has agreed to supervise (监督) us”可知，Mrs. Meer对作者的建议是持积极态度的，故选C项。3Why did Terri Olsen write this letter?ATo ask students to care for the plants.BTo try to make the school more beautiful.CTo advise students to visit Natural Springs.DTo draw the
50、headteachers attention to nature.解析：选B写作意图题。由第一段中的“we cannot turn our school into such a garden, we can surely add more beauty to its surroundings”以及下文的相关信息可知，作者通过此信旨在说服校长同意自己的建议，即：通过举办植物交换活动给自己的学校引进更多植物来美化校园，故选B项。BWhen you hear the name Greenland, you might think of a place with warm weather and lo
51、ts of leafy forests. In reality, about 80 percent of this Arctic island is covered by a sheet of ice and now that ice is melting fast. As a result, NASA has sent a robot to help save the islands ice.To determine how to do that, scientists need to learn more about how and why Greenlands ice sheet is
52、changing. But sending human researchers to study the ice sheet on snowmobiles and in aircraft can be expensive and timeconsuming.So a group of college students at a NASA engineering summer camp came up with an alternative. They invented a robot known as GROVER. On May 3, NASA sent GROVER to Greenlan
53、d to begin gathering data on the changes that the ice sheet is undergoing.Last summer alone, more than 97 percent of Greenlands icy surface experienced some melting. Some scientists predict that in 2,000 years, the entire ice sheet will be one big puddle (水坑) because of rising temperatures in the re
54、gion. Thats bad news. If the ice sheet completely melts, sea levels will rise. Rising sea levels around the world could bring about severe flooding, and some small islands could even disappear beneath the waves.Thats why, during the next month, GROVER will travel for more than 400 miles over the ice
55、 sheet. GROVER will be able to work longer and gather more data than any scientist on a snowmobile could. The 6foottall, 800pound robot is powered by solar energy. It will be able to run anytime throughout the day or night because the sun never sets below the horizon (地平线) during the Arctic summer.“
56、Robots like GROVER will give us a new tool for glaciology (冰川学) studies，” says NASA glaciologist Lora Koenig.Scientists hope this is just the beginning for GROVER. If the robot completes its first test, NASA plans to send GROVER out to explore the ice sheet for many months at a time.语篇解读：本文是说明文。文章主要
57、报道了格陵兰岛冰川面临的严峻形势及NASA为此采取的措施。4NASA sent GROVER to Greenland in order to _.Aexplore the resources in GreenlandBdo experiments with some college studentsCset up an engineering summer camp in GreenlandDstudy how and why Greenlands ice sheet is changing解析：选D细节理解题。由第二段的“scientists need to learn more abou
58、t how and why Greenlands ice sheet is changing”以及第三段的“NASA sent GROVER to Greenland to begin gathering data on the changes that the ice sheet is undergoing”可知。5The fourth paragraph is mainly about _.Athe current environment in GreenlandBthe reasons for Greenlands melting iceCthe consequences of Gree
59、nlands melting iceDthe experiences NASA scientists have had in Greenland解析：选C段落大意题。第四段主要讲述科学家预言冰川融化可能会给格陵兰岛带来的影响海平面上升、洪涝灾害严重、小的岛屿将会消失。6According to the text, GROVER _.Ais powered by batteriesBcan be used as an aircraftCwas designed by NASA scientistsDcan work at any time during the day解析：选D细节理解题。由倒数
60、第三段的“. powered by solar energy. It will be able to run anytime throughout the day or night .”可知，由于夏日的北极圈会有极昼，因此依靠太阳能获取动力源的GROVER可以全天候随时工作。7Lora Koenigs attitude towards GROVER might be _.Ahopeful BworriedCuncertain Ddissatisfied解析：选A观点态度题。由倒数第二段Lora Koenig说的“Robots like GROVER will give us a new too
61、l for glaciology studies”可知，他对机器人GROVER抱有希望。CClimate change has been blamed for killer hurricanes, sea level rise, and drought, but a new report suggests the effects of climate change might hit the worlds coffee supply. Up to 70 percent of the worlds coffee supply could be threatened over the next 6
62、6 years, according to a new study by researchers at Englands Royal Botanic Garden.Nearly 100 percent of the worlds arabica coffee growing regions could become unsuitable for the plant by 2080, according to the study. Beans from arabica coffee plants account for about 70 percent of the worlds coffee,
63、 but the plant has to be grown under strict weather conditions: they thrive at temperatures between 64 and 70 degrees Celsius, and are highly influenced by frost or temperatures higher than 73 degrees Celsius.With temperatures estimated to increase by between 1.8 and 4 degrees Celsius by the end of
64、the century, the fragile plant might become increasingly expensive and difficult to grow, especially in places such as Ethiopia and Kenya. In that worst case, nearly all of the worlds native arabica coffee would die out. Under more conservative estimates, about 65 percent of the regions that used to
65、 grow the coffee would become unsuitable for it. The evidence from coffee farmers, from numerous coffee growing regions around the world, is that they are already suffering the influences of increased warming.Some commercial farmers would likely be able to move their operations to other areas or wou
66、ld be able to overcome climate change with artificial cooling techniques, but wild arabica is generally considered to be much more suitable for making highquality coffee.If arabica becomes impossible to raise in its native areas, it could wreak havoc (造成破坏) on the economies of the mainly thirdworld
67、countries in which it grows. Coffee is the worlds most popular drink and is the second mosttraded commodity in the world, behind oil.语篇解读：本文是一篇研究报告，主要介绍了气候变化对世界咖啡产量的影响，尤其是对小粒咖啡的影响。8What does the passage mainly talk about?AClimate change affects people in many ways.BMore and more attention has been p
68、aid to climate change.CThe worlds coffee supply could be threatened by climate change.DThe growing conditions of arabica coffee have been improved recently.解析：选C主旨大意题。由第一段中的“Up to 70 percent of the worlds coffee supply could be threatened over the next 66 years, according to a new study by researche
69、rs at Englands Royal Botanic Garden.”可知答案为C。9What can be learned from Paragraph 2 and Paragraph 3?AAccording to the study, by 2080 almost nowhere can be suitable for arabica coffee growing.B65 percent of the worlds coffee gets raw materials from arabica coffee plants.CArabica coffee plants will grow
70、 well at temperatures lower than 60 degrees Celsius.DCoffee farmers are the biggest victims of climate change.解析：选A细节理解题。由第二段中的“Nearly 100 percent of the worlds arabica coffee growing regions could become unsuitable for the plant by 2080, according to the study.”可知答案为A。10In order to solve the proble
71、m of arabica coffee plants, some farmers _.Awould make efforts to produce highquality coffeeBwould bring in artificial cooling techniquesCwould tend to move to some warm placesDwould grow more wild arabica解析：选B细节理解题。由第四段中的“Some commercial farmers would likely be able to move their operations to othe
72、r areas or would be able to overcome climate change with artificial cooling techniques”可知答案为B。11What is the consequence if arabica coffee has less production?ACoffee will replace oil to be the first mosttraded commodity.BCoffee is likely to become less popular than before.CSome countries will suffer
73、 great economic losses.DFarmers will plant other crops instead of coffee.解析：选C推理判断题。由最后一段中的“If arabica becomes impossible to raise in its native areas, it could wreak havoc (造成破坏) on the economies of the mainly thirdworld countries in which it grows.”可知答案为C。.阅读七选五Endangered speciesAn endangered spec
74、ies is any type of plant or animal that is in danger of disappearing forever. If a species, or type, of plant or animal dies out completely, it becomes extinct.Animals and plants depend on each other and their environment to survive. When their environment, or habitat, changes or disappears, plants
75、and animals may become endangered. _1_Humans can cause species to become endangered as well. Humans pollute habitats with garbage, car fumes (尾气), and factory waste. They destroy habitats by clearing land for roads, buildings and farms. _2_The arrival of a new species in a habitat is another threat.
76、 _3_ The species already in the habitat may not be able to compete against the newcomer. For example, mongooses (猫鼬) brought to Jamaica in the 1800s killed many native animals.The list of endangered animals includes many large, wellknown animals. The tiger and both African and Asian elephants are en
77、dangered. Several types of whale are also endangered. Endangered plant species range from tiny mosses (藓类植物) to towering trees.In the 1960s people became aware that many species were endangered. Today many countries have made it illegal to harm, catch, kill, or sell endangered species. _4_ The Inter
78、national Union for Conservation of Nature and Natural Resources keeps lists of endangered species. The Nature Conservancy and the World Wildlife Fund help to set aside land for threatened wildlife. _5_ Such programs have helped to increase the populations of many endangered animals.AThe panda surviv
79、es only in remote parts of China and in zoos.BNature preserves and zoos help endangered animals to reproduce.CThey also may hunt and kill too many of certain types of animals.DOften the new species spreads freely because it has no natural enemies.ENatural disasters or changes in the climate can harm
80、 or destroy habitats.FPeople have cut down many of these trees to build houses, ships and furniture.GIn addition, many organizations work to keep endangered species from becoming extinct.1选E由该空前的“When their environment, or habitat, changes or disappears, plants and animals may become endangered.”可知，
81、E项“自然灾害或气候变化可能危害或破坏动植物的栖息地”符合此处语境。2选C由该段中的“Humans can cause species to become endangered”和“Humans pollute habitats with .”以及“They destroy habitats by .”可知，设空处是描述人类导致物种灭绝的做法，故C项符合此处语境。3选D由该空前的“The arrival of a new species”以及该空后的“The species already in the habitat may not be able to compete against th
82、e newcomer.”可知，设空处是对新物种的描述，故选D项。4选G由该空前的“Today many countries have made it illegal to .”以及该空后对国际自然和自然资源保护联盟、自然保护和世界野生动物基金会的描述可知，G项“此外，很多组织也努力保护濒危物种”符合此处语境。5选B由该空前的“The International Union for Conservation of Nature and Natural Resources .”和“The Nature Conservancy and the World Wildlife Fund .”可知，设空处描述保护濒危物种的举措，故B项“自然保护区和动物园帮助濒危物种繁殖”符合此处语境。