2019高考英语一轮基础自练题Unit2Cloning(含解析)新人教版选修8

Unit 2 Cloning李仕才一、阅读理解AEnjoying a musical performance no longer requires a costly ticket or a trip to a theater. These days, musicians are performing in private homes, at haircutting shops, at airports... even on ferry boats.Musicians like house concerts. At music clubs, they often have to perform over loud conversation or deal with people who have had too much alcohol. People at house concerts are more focused on listening to the music.Just a few hours before the Bombadils started singing at the O' Hair Salon, Lindsay was cutting hair and Tamera was doing facials. Then, they moved chairs and microphones to create a small performance space. The Bombadils made music in the front part of the hair salon, near the hairdryers and make­up tables.“T his is our first show at a hair salon，” Sarah Frank of the Bombadils told concertgoers at last week's performance. Frank said she and band members, Luke Fraser and Kaitlyn Raitz had a great time “interacting” with the audience.Concerts in people's homes, or small businesses such as O' Hair's, are becoming more popular, musicians say. “There is a more relaxed atmosphere，” said Domenic Cicala, a musician who opened up his O' Hair Salon to concerts. “People really get to know the artists.”At house concerts, people get time before and after concerts to meet the performers. Often, the hosts or guests will provide food and drink.“People really like listening to music in the living room of a friend，” said Matt Hart, with Aubrey Zoli making up the Local Stran gers, a folk­rock group based in Seattle. At many such concerts, the musicians do not need microphones. Yet, every word of their songs can be heard.【文章大意】本文主要介绍了现代音乐会在举办场地的选择上更加多样化。

Unit 2 Cloning李仕才一、阅读理解。

If you're making determination for a healthier new year, consider a gut makeover(肠道清理)．Changing your microbe community(微生物群)，however, may not be easy，and nobody knows how long it might take.That's because the ecosystem already established in your gut determines how it absorbs and processes nutrients.So if the microbe community in your gut has been shaped by a daily diet of hamburgers and pizza，for example，it won't respond as quickly to a healthy diet as a gut shaped by vegetables and fruits that has a more varied microbe community.“The nutritional value of food is influenced in part by the microbe community that encounters that food，” said Dr Jeffrey Gordon，the senior author of the new paper and director of the Center for Genome Science and Systems Biology at the Washington University School of Medicine in St.Louis.“Nutritional components of a healthy diet have to be viewed from the inside out，” he said，“not just the outside in.”One of the questions the study set out to answer was how individuals with different diets respond when they try to improve their eating habits.The scientists harvested gut bacteria from humans，transplanted them into mice bred under germ­free conditions，and then fed the mice either American­style or plant­ba sed diets.The scientists then analyzed changes in the mice's microbe communities.Of interest，the scientists harvested the gut bacteria from people who followed sharply different diets.One group ate a fairly typical American diet，consuming about 3 000 calories a day，high in animal proteins with few fruits and vegetables.Some of their favorite foods were processed cheese and lunch meat.The other group consisted of people who werecalorie­restricted.They ate less than 1 800 calories a day and had carefully tr acked what they ate for at least two years，sticking to a mostly plant­based diet and consuming far less animal protein than the other group，a third fewer carbohydrates(碳水化合物)and only half the fat.This calorie­restricted group，the researchers found，had a far richer and more diverse microbe community in the gut than those eating a typical American diet.They also carried several kinds of“good” bacteria，known to promote health，that are unique to their plant­based diet.“Perhaps the best way to shape a healthier microbe community is to eat more fiber by consuming more fruit，vegetables，whole grains，and nuts or seeds，” said Meghan Jardine，a dietitian who was not involved in the current study but has published articles on promoting healthy microbe communities.She urges people to aim for 40 to 50 grams of fiber daily，well above levels recommended by most dietary guidelines.1．What can we know from the first two paragraphs?A．Changing microbiome is fairly easy.B．Ecosystem in gut is shaped by carbohydrates.C．Nutritional components are determined by food intake.D．As to healthy diets，microbe community shaped by vegetables and fruit respond more quickly than that shaped by junk food.2．What can we learn about Meghan Jardine?A．She suggests eating as little as possible.B．She attaches great importance to fiber.C．She is one of the researchers of the current study.D．She advocates consuming more meat in daily life.3．What's the author's attitude toward gut makeover?A．Concerned. B．Opposed.C．Indifferent. D．Nervous.4．Which is the best title for the text?A．Microbe community in our gutB．A gut makeover for the new yearC．Dietary guidelines for daily dietsD．The best way towards a healthier microbe community【解题导语】本文是一篇说明文。

Unit 2 Cloning李仕才一、阅读理解。

(2018·昆明高三复习适应性检测)Bike Share Toronto is the city’s official bike share program，designed to give locals and visitors a fun, affordable and convenient alternative to walking, taxis, buses and the subway. There are 200 Bike Share Toronto stations and 2，000 bikes across the city, making Bike Share the most accessible way to get around and explore.How it works·Become an Annual Member or buy a Day Pass to access the system.·Find an available bike nearby，and get a ride code or use your member key to unlock it.·Take as many short rides as you want while your pass or membership is active.·Return your bike to any station，and wait for the green light on the dock(停靠点) to make sure it’s locked.Choose a plan·For visitorsDay Pass：$7. Unlimited 30­minute rides in a 24­hour period.3­Day Pass：$15. Unlimited 30­minute rides in a 72­hour period.·For localsMonthly Pass：$25. Unlimited 30­minute rides for a month.Annual Membership：$90. Unlimited 30­minute rides for a whole year. The Annual Membership is the best deal for locals of Toronto and otherfrequent riders.The first 30 minutes of each ride is included with the membership or pass price. Avoid extra fees by dropping off your bike every 30 minutes at any other station. If you keep a bike out for longer than 30 minutes at a time，you will be charged an extra $1.50 for the first 30 minutes over，$4 for the next 30 minutes，and $7 for each additional 30 minutes after that.Contact us·Customer Service：(855)898­2378·Repair Service：(855)898­2388·Corporation Partners：(855)898­2398·Employment Opportunities：(855)898­2498【解题导语】本篇文章是一篇说明文，介绍了加拿大城市多伦多实行共享单车的一些情况：单车怎么运行、怎么收费和联系方式。

Unit 2 Cloning李仕才(选修8Unit 2)【短文语法填空】语法填空。

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

(选自2017·日照检测)TOEFL, short for Test of English as a Foreign Language, is a standardized test of English. The TOEFL test is an important step of your journey __1__ (study) in an English－speaking country.The TOEFL test __2__ (measure) your ability to use and understand at the university level. And it evaluates __3__ well you combine your listening, reading, speaking and writing __4__ (skill) to perform academic tasks.More than 30 million people from all over the world have taken the TOEFL test to show __5__ English－language competence. The TOEFL test has __6__ (many) test dates and locations than any other English­language test in the world. You can retake the test many times as you wish, __7__ you cannot take it more than once in a 12－day period.The TOEFL test is the most __8__ (wide) respected English­language test in the world, __9__ (organize) by more than 9 000 colleges, universities and agencies in more than 130 countries, __10__ (include) Australia, Canada, the U. K. and the United States. Wherever you want to study, the TOEFL test can help you get there. 【语篇解读】本文是一篇说明文，向读者介绍了托福考试的一些相关内容，包括考查项目、参加次数以及托福考试的影响和作用等。

Cloning李仕才***阅读理解。

The Internet plays a big part in human life. We use it for work and entertainment. We can find new recipes on the Internet or advice on staying healthy. We can even use it to learn a new language. We use the Internet to connect with family and friends and stay in touch with issues we care about.The list goes on and on.As far as the Internet being a part of our lives—well, that train has left the station. That expression means there is no going back. If you prefer boating, you can say that ship has sailed.So, there may be no going back to an Internet-free life. But can using the Internet too much be bad for our health?It might be, say researchers.Study results show that teens who spend at least 14 hours a week online were more likely to have high blood pressure.High blood pressure makes your heart and blood vessels work too hard. Over time, this extra strain increases your risk of a heart attack or stroke.High blood pressure can also cause heart and kidney disease. It is also closely linked to some forms of dementia, a brain disease. Dementia is marked by memory disorders, personality changes, and a reduced ability to reason.Let’s introduce something about the study of it.The Henry Ford Hospital in Detroit, Michigan did the study. It involved 335 young people, from 14 to 17 years old. One hundred thirty-four of the teens were described as “heavy Internet users”. Researchers found that out of these 134 teens, 26 had high blood pressure.The researchers say the study is the first to connect heavy web use and high blood pressure. Other research has connected that heavy Internet use with health problems including anxiety, depression and obesity.The lead researcher of the study is Andrea Cassidy-Bushrow. In a statement shes aid, “Using the Internet is part of our daily life but it shouldn’t consume us. ”For the purpose of the study, she explains, teens considered heavy Internet users were online on “average 25 hours a week. ”Ms Cassidy-Bushrow adds that it is important for teens to take “regular breaks from their computers or smartphones” and to do some “kind of physical activity. ”She also suggests that parents limit their children’s use of the Internet to two hours a day, five days a week.【文章大意】互联网如此有用并且融入我们的生活, 但过度使用它, 会导致多种健康问题。

Unit 2 Cloning李仕才一、阅读理解。

Kanda really doesn’t like to walk alone.The scientist from a research institute of intelligent robots finds the experience so boring that he’d rather drive—even though he lives close to his lab and knows that walking is healthy.“I enjoy walking with someone，like with my wife，with my daughter，” Kanda said.“But they are not always available.”So Kanda，who specializes in human­like bots，developed a robotic walking partner that could make small talk based on its surroundings，which，he hopes，might motivate people to get out and exercise more.The bot rests on a person’s shoulder like a boxy parrot.It weighs about a pound and a half and sits roughly 8.5 inches high，and is 3.5 inches wide and 10 inches long.A microphone，a speaker，and an internal camera allow it to communicate.It’s even equipped with a smile.Kanda and his team collected video from five different locations，including a garden and a shopping mall，and created a dataset of small talk topics related to each location.Then they programmed the robot to associate visual cues with specific topics.A special speech software provided the robot with a voice.Near a group of parked cars，for example，it might say，“In a big parking lot， sometimes I forget where I parke d.”They tested the robot on 15 volunteers，10 males and 5 females，who were paid and averaged about 26 years old.“Have you ever blown a puff of dandelion（蒲公英） seeds into the air？”The robot asked a particip ant，who smiled and responded，“Yes，I often did that w hen I was a child.” Although several participants noted the robot’s weight，Kanda was surprised that no one considered the experience strange or funny.“I guess people enjoy new technologies，” he said.Just like a human partner，Kanda’s bot isn’t perfect.It’s not able to go for walks in heavy rain and，while the robot can make expressions，it can’t really holda conversation，about which Kanda is most worried.Despite its limits，Kanda was comforted by the bot’s presence.“I felt a kind of sense of being with someone，”he said，“particularly when it spoke.”【解题导语】本文主要介绍了新研发的陪人散步的机器人。

选修8 Unit 2 Cloning李仕才一、阅读理解ADespite being used by 1.34 billion people each year, traveling on the Tube in London can actually be quite lonely.One citizen, however, is trying to change this. “You get on the Tube and it's completely silent and it's weird，” says Jonathan Dunne, who has started a worldwide dialogue after giving out badges (徽章) with the words “Tube chat？” last month, encouraging passengers in London to get talking to one another. “I handed out 500 badges during rush hour in a city of 8 million, expecting most of them to be thrown away, but after about 24 hours it completely snowballed，” he says. Dunne and his “Tube chat” campaign have since been reported by media across the world, seeing TV interviews in Sweden, Brazil and the UK, as well as countless website, newspaper and magazine appearances.Although Dunne says he's received mostly positive feedback, not everyone agrees with his idea. Londoner Brian Wilson responded with a campaign of his own, handing out 500 badges with the words “Don't even think about it” on them. Michael Robinson, 24, a student from London, agrees. “Being on the Tube is the only peace and quiet some people get on their journeys to and from work. It doesn't need to be spoiled by people coming up and chatting to you，” he says.“People assume that I just walk up and talk to strangers, which I don't, but it's been a great way to meet people you would never have normally spoken to，” Dunne says.So if you ever end up using public transport in the West, why not say hello to the person next to you? Just make sure to check for a badge first.【文章大意】每年乘坐伦敦地铁的乘客众多，可是人们仍然感到孤独；为此Jonathan Dunne发起了一个旨在鼓励乘客相互交谈的运动，此举引起了世界媒体的关注。

Unit 2 Cloning李仕才(选修8Unit 2)【短文语法填空】语法填空。

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

(选自2017·日照检测)TOEFL, short for Test of English as a Foreign Language, is a standardized test of English. The TOEFL test is an important step of your journey __1__ (study) in an English－speaking country.The TOEFL test __2__ (measure) your ability to use and understand at the university level. And it evaluates __3__ well you combine your listening, reading, speaking and writing __4__ (skill) to perform academic tasks.More than 30 million people from all over the world have taken the TOEFL test to show __5__ English－language competence. The TOEFL test has __6__ (many) test dates and locations than any other English­language test in the world. You can retake the test many times as you wish, __7__ you cannot take it more than once in a 12－day period.The TOEFL test is the most __8__ (wide) respected English­language test in the world, __9__ (organize) by more than 9 000 colleges, universities and agencies in more than 130 countries, __10__ (include) Australia, Canada, the U. K. and the United States. Wherever you want to study, the TOEFL test can help you get there. 【语篇解读】本文是一篇说明文，向读者介绍了托福考试的一些相关内容，包括考查项目、参加次数以及托福考试的影响和作用等。

选修8Unit 2李仕才考点规范练(选修8Unit 2)【短文语法填空】在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

During our journey we came to __1__ bridge. As we were crossing __2__ bridge，we met __3__ old man and spoke to him. __4__ man refused to answer us at first. He could tell at a glance that we had escaped from __5__ prisoner­of­war camp and he was afraid of getting into trouble. We weren't __6__ first prisoners of war to have escaped from __7__ camp. As soon as Jim produced __8__ revolver, __9__ man proved very willing to answer our questions. He told us exactly where we were and directed us to __10__ farm where we might find food.1．______ 2.______ 3.______ 4.______ 5.______6．______ 7.______ 8.______ 9.______ 10.______参考答案：1.a2.the3.an4.The5.a/the6.the7.the 8．a 9.the 10.aⅠ.阅读理解(2016·河南六市第一次联考)He may not have an “S” across his chest but this dog is most certainly a hero.Harley,who was rescued from a puppy mill four years ago,was named the American Humane Association’s 2015 American Hero Dog.Harley,who is missing an eye and h as other medical issues from his time at the mill,is now a “spokes-dog” against puppy mills.He serves as the adorable furry face of the “Harley to the Rescue” campaign,which raises funds for the National Mill Dog Rescue,according to a press release.The pu p was rescued back in 2011 and adopted by Rudi and her husband,Dan.“It was just four years ago that he was pulled from the cage in the puppy mill and left to die,”Harley’s owner,Rudi,said during the awards show at the Beverly Hilton Hotel in Los Angeles this past weekend,according to .“We never would haveever thought he would live this long and make such a difference for so many puppies.”The dog was one of eight finalists up for the American Hero Dog and was chosen as the winner through public votes.The finalists all won $1,500 to be donated to one of American Humane Association’s charity partners,with Harley receiving another $5,000 to go toward his charity partner,New Leash On Life.According to the release,Harley spent 10 years at the puppy mill,and endured rough treatment there,which led to his many medical issues.He lost his eye as a result of his cage being power-washed with him inside.The dog isn’t just the face of his campaign,he also goes on rescue missions and makes public appearances at events and schools to raise awareness for puppy mills.This incredible work is all due to the dog’s fighting spirit.That spirit is allowing him now to be the voice for dogs who cannot speak for themselves and give everybody hope that tomorrow’s going to b e a better day.1.How did the “Harley to the Rescue” campaign function?A.By saving dogs from a puppy mill.B.By operating the American Humane Association.C.By collecting money for the National Mill Dog Rescue.D.By giving endangered dogs enough medical treatment.2.What is the author’s attitude to the puppy mill according to the text?A.Unsatisfied.B.Sympathetic.C.Doubtful.D.Tolerant.3.Why was Harley blind in one eye?A.He was born with it.B.His owner treated him roughly.C.It was caused by a medical issue.D.He was washed heavily in a cage.4.What can we know about the dog from the text?A.It would be given to New Leash On Life.B.It was kept by Rudi’s family.C.It would be taken away by its puppy mill.D.It returned to the National Mill Dog Rescue.BScientists in Britain have managed to teach bumblebees(大黄蜂) to pull strings to get to food and then pass on what they have learned to others in their colony(群体)—showing a high level of intelligence despite their tiny brains.Researchers at Queen Mary University of London said the experiments, often used to test the intelligence of apes (猿) and birds, showed for the first time that some insects are up to the task, and can also pass skills on through several generations.The findings add to the evidence suggesting the ability for ＂culture spread＂— the ability to learn and pass on knowledge and skills — may not be exclusive to humans.In the research, published in the journal PLOS Biology on Tuesday, the scientists were able to train 23 out of a group of 40 bees to pull strings with their legs and feet.The strings were attached to discs —or artificial ＂flowers＂—containing food at their center but placed under a transparent screen. The bees, spotting the food beneath the screen, learned to pull the ＂flowers＂ out by pulling the string with their legs and feet to be able to get to it.From another group of bees given the chance to solve the task without any training, only two of 110 were successful.Another group of bees was then allowed to observe the trained bees pulling the strings, and 60 percent of them successfully learned the skill. Finally, trained bees were put in colonies, and the scientists found the technique spread successfully to a majority of the colony’s worker bees.Lars Chittka, a Queen Mary University professor who guided the project, said the team is interested in figuring out the brain processes behind the bees’ learning and teaching skills.1.What does the underlined word ＂exclusive＂ in Paragraph 3 probably mean?A. Ordinary.B. Unique.C. Beneficial.D. Widespread.2.What did the researchers find about bees?A. Bees learn best in insects.B. Bees are as clever as birds.C. Bees are born good learners.D. Bees can be trained to learn skills.3.What may the research team focus on next?A. What else bees can do.B. Where bees learn skills.C. How bees teach others.D. How bees’ brain work.4.What may be the best title for the text?A. Small bees, great abilitiesB. Bees can learn and teachC. Bees are smarterD. Let bees learnⅡ.完形填空Last year,I had a car accident.I was 1 ,and I had my two children in the car.2 ,they both were OK.Despite having scratches on my left arm and neck,I felt3 right after the accident.Later that night,though,there was something wrong with me and my husband sent me to hospital immediately.My 4 said I had a concussion (脑震荡).The first week I felt like my inner 5 was off.I walked slowly,moving from side to side.I had difficulty in communicating because it was hard to remember words and I couldn’t 6 clearly.I wore sunglasses all day because the light hurt my 7 .When all of these 8 disappeared,people thought I had recovered,especially when my 9injuries weren’t apparent;people 10the pain that I was experiencing.They thought that I had 11,but I hadn’t.I was anxious and 12 .I gained 25 pounds because of stress eating.I felt like a victim.I couldn’t bear anymore and I 13 to cure myself.I wrote down my feelings.I started meditating(冥想)and losing 14 .It’s almost been a year since the 15 .My neck still tenses when I’m nervous,but there are fewer headaches.I still have panic attacks,but less 16 .Although I’m recovering slowly,the dead,hopeless look in my eyes is 17 .My mind is teaching me something new:You were knocked down hard.Your brain was hit.But you were given another 18 .I consider almost daily 19 I’ll live my second life.I’ll live with less speed and fewer things on the to-do lists.I’ll become my children’s strongest backer and tell them,“I’m 20 here no matter what happens.”1.A.sad B.terrified C.tired D.surprised2.A.Immediately B.StrangelyC.HopefullyD.Thankfully3.A.hurt B.fineC.worriedD.lucky4.A.husband B.friendsC.doctorD.children5.A.balance B.senseC.strengthD.wisdom6.A.see B.speak C.write D.hear7.A.eyes B.ears C.arm D.neck8.A.difficulties B.mistakesC.situationsD.symptoms9.A.personal B.emotionalC.internalD.physical10.A.refused B.forgotC.controlledD.felt11.A.calmed down B.looked outC.moved onD.given in12.A.stressful B.disappointedC.shamefulD.dissatisfied13.A.agreed B.continuedC.managedD.decided14.A.force B.sympathyC.weightD.confidence15.A.illness B.accidentC.changeD.cure16.A.desperately B.frequentlyC.quicklyD.crazily17.A.gone B.specialelessD.funny18.A.concern B.challengeC.choiceD.chance19.A.when B.why C.where D.how20.A.also B.already C.always D.againⅢ. 短文改错Dear Tom,It is nice to receive your email.Now I’d like to telling you something about the Palace Museum.The Palace Museum,also call the Forbidden City,began to be built in 1406.It took more than a million worker 14 years to build it and the Palace Museum has finished in 1420.You may be surprising that the palaces in the Forbidden City have 9,999 rooms altogether and as you know it in China,“nine” is regarded as the lucky number.As largest museum in the world,the Palace Museum held cultural treasures from the past 5,000 years of Chinese history.Now,every Tuesday,the Palace Museum is open to Chinese students for free but I hope you have a chance to come to China and take a look for it with your own eyes.Yours,Li Ming考点规范练(选修8Unit2)Ⅰ.【解题导语】本文是一篇记叙文。

Cloning李仕才一、阅读理解Pollution’.grea.effect.o.th.environmen.hav.becom.mor.obviou.i.recen.years.le adin.t..movemen.t.promot.energ.efficiency（效率）,les.relianc.o.fossil（化石.fuels.an..reductio.i.ai.an.wate.pollution.Mos.scientist.agre.tha.suc.change.ar .necessar.t.protec.ou.environmen.fro.furthe.harm.rg.quantit.o.energ.an.resource.an.create..h ug.amoun.o.pollution.I.th.Unite.States.buildin.an.developmen.accoun.fo.39.o.th.co untry’e.12.o.tota.wate.consumption,68.o.tota.electricit.consumptio .an.38.o.carbo.dioxid.emissions（二氧化碳排放）.accordin.t.th.Environmen.Protectio.Agency..les.energy.water.creat.les.waste.an.ar.healthie.t.live.work. . resource.mor.efficientl.durin.th.entir.buildin.cycle—construction.restoration.operation.maintenance（维护）an.demolition（拆毁）—tha.thos.wh.construc.mor.regula.buildings.Th.environmenta.benefit.o.buildin.gree.includ.th.protectio.o.ecosystems（生态系统）an.biodiversity.improve.ai.an.wate.quality.les.wast.flowin.int.streams.an.th.prot ectio.o.natura.resources.Gree.building.ca.als.resul.i.lowe.operatin.cost.becaus.t .les.energ.an.fewe.material.an.improv.indoo.ai.quality.improvin.th. healt.o.peopl.wh.liv.i.suc.buildings.Th.proces.o.buildin.gree.include.technica.an.artisti.plannin.wit.natur.protec tio.i.mind.Buildin.design.ofte.reflec.th.surroundin.environmen.an.natura.resource .renewabl.buildin.material.suc.a.bambo.an.straw.I.addition.recycle.resource e.fo.gree.buildings.reducin.th.cos.an.ai.pollutio.associate.wit .transportin.material.ove.lon.distances.Carefu.sit.selectio.i.importan.t.minimize（最小化）huma.impac.o.th.surroundin.environment.Fo.example.placin..structur.i.a.are.tha.allow.i.t.tak.advantag.o.coo.breezes（微风）rge.bu ilding.a.well.s.i.i.importan.t.buil.small..an.cost.Thes.roof. pletel.covere.wit.plants.whic.help.t.kee.heatin.an.coolin.costs.pre ven.wate.runnin.of.an.dea.wit.pollutants.Othe.feature.o.gree.building.ofte.includ.energ.an.wate.conservation.recycling.an. wast.reduction.I.addition.renewabl.energ.source.suc.a.sola.power.hydropower（水能）e.fo.hea.an.electricity.whic.greatl.reduce.cost.an.decrease.th.i mpac.o.th.environment.1.What is the text mainly about?A.Th.necessit.o.promotin.energ.efficiency.B.Th.proces.o.buildin.gree.buildings.C.Th.benefit.an.feature.o.gree.buildings.D.Gree.building.effect.o.th.environment.2.According to the text, green buildings refer to the buildings that______.A.produc.n.waste.clea.energyC.ar.mad.o.recycle.materials.energ.an.resource.mor.efficiently3.Which of the following statements is TRUE about green buildings?A.The.rel.o.fossi.fuel.an.sola.powe.fo.hea.an.electricity.rge.ones.C.Th.ecosyste.ha.t.b.considere.whe.buildin..gree.building.D.The.ar.difficul.t.maintai.an.thu.nee.mor.operatin.costs.4.Why are green roofs used ?A.The.fi.th.surroundin.environmen.wellB.The.ar.cheape.tha.othe.kind.o.roofs.i.everyda.lifeD.The.ca.hel.t.contro.th.temperatur.i.th.buildin.well【文章大意】在本文中作者主要分析了green building的诸多好处和对环境的巨大的保护作用, 呼吁人们多建设这样的绿色的建筑。