1、Unit 22 课时跟踪练(一) Warmup & Lesson 1 Prereading.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 school
2、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 and tr
3、ansplanted 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 plants here
4、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 school. All
5、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，以此引进更多的植物来美化
6、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C推理判断题。
7、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 headtea
8、chers 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 lots of l
9、eafy 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 changin
10、g. 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 Greenland to be
11、gin 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 region. T
12、hats 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 sheet.
13、 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.“Robots
14、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。文章主要报道了格陵兰岛
15、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 about how a
16、nd 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 Greenlands
17、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。由倒数第三段的“.
18、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 tool for g
19、laciology 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 66 years
20、, 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, but th
21、e 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 the cen
22、tury, 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 grow t
23、he 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 would be a
24、ble 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 countri
25、es 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 paid to
26、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 researchers at E
27、nglands 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 well a
28、t 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 problem of ar
29、abica 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 other areas
30、 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 great
31、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 species is
32、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 and ani
33、mals 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. _3_ Th
34、e 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 endangere
35、d. 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 Internationa
36、l 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 survives only
37、 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 or des
38、troy 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，E项“自然灾害
39、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 the newco
40、mer.”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。