2020年12月大学英语四级考试真题（三）Part IWriting(30 minutes)Directions:For this part,you are allowed 30 minutes to write on the topic Changes in the Way ofCommunication.You should write at least 120 words but no more than 180.words.Part IListening Comprehension(25 minutes)说明：由于2020年12月四级考试全国共考了两套听力，本套真题听力与前两套内容相同，只是选项顺序不同，因此在本套真题中不再重复出现。PartⅡReading Comprehension(40 minutes)Section ADirections:In this section,there is a passage with ten blanks.You are required to select one word for eachblank from a list of choices given in a word bank following the passage.Read the passage through carefullybefore making your choices.Each choice in the bank is identified by a letter.Please mark the correspondingletter for each item on Answer Sheet 2 with a single line through the centre.You may not use any of thewords in the bank more than once.The things people make,and the way they make them,determine how cities grow and decline,andinfluence how empires rise and fall.So,any disruption to the world's factories 26.And thatdisruption is surely coming.Factories are being digitised,filled with new sensors and new computers tomake them quicker,more 27,and more efficient.Robots are breaking free from the cages that surround them,learning new skills and new ways ofworking.And 3D printers have long28a world where you can make anything,anywhere,from acomputerised design.That vision is 29closer to reality.These forces will lead to cleaner factories,producing better goods at lower prices,personalised to our individual needs and desires.Humans will be30 many of the.dirty,repetitive,and dangerous jobs that have long been a 31 of factorylife.Greater efficiency 32 means fewer people can do the same work.Yet factory bosses in manydeveloped countries are worried about a lack of skilled human workers-and see 33 and robots as asolution.But economist Helena Leurent says this period of rapid change in manufacturing is a 34opportunity to make the world a better place."Manufacturing is the one system where you have got thebiggest source of innovation,the biggestsource of economic growth,and the biggest source of great jobs inthe past.You can see it changing.That's an opportunity to 35 that system differently,and if wecan,it will have tremendous significance."A)automationF)featureK)mattersB)concernsG)flexibleL)movingC)enormouslyH)inevitablyM)promisedD)fantasticI)interactionN)shapeE)fascinatedJ)leaningO)spared四级2020年12月47Section BDirections:In this section,you are going to read a passage with ten statements attached to it.Eachstatement contains information given in one of the paragraphs.Identify the paragraph from which theinformation is derived.You may choose a paragraph more than once.Each paragraph is marked with aletter:Answer the questions by marking the corresponding letter on Answer Sheet 2.The History of the Lunch BoxA)It was made of shiny,bright pink plastic with a Little Mermaid sticker on the front,and I carried itwith me nearly every single day.My lunch box was one of my first prized possessions,a proudstatement to everyone in my kindergarten:"I love Mermaid-Ariel on my lunch box."B)That bulky container served me well through my first and second grades,until the live-action versionof 101 Dalmatians hit theaters,and I needed the newest red plastic box with characters like Pongo andPerdita on the front.I know I'm not alone here-I bet you loved your first lunch box,too.C)Lunch boxes have been connecting kids to cartoons and TV shows and super-heroes for decades.But itwasn't always that way.Once upon a time,they weren't even boxes.As schools have changed in thepast century,the midday meal container has evolved right along with them.D)Let's start back at the beginning of the 20th century-the beginning of the lunch box story,really.While there were neighborhood schools in cities and suburbs,one-room schoolhouses were common inrural areas.As grandparents have been saying for generations,kids would travel miles to school in thecountryside (often on foot).E)"You had kids in rural areas who couldn't go home from school for lunch,so bringing your lunchwrapped in a cloth,in oiled paper,in a little wooden box or something like that was a very long-standing rural tradition,"says Paula Johnson,head of food history section at the Smithsonian NationalMuseum of American History in Washington,D.C.F)City kids,on the other hand,went home for lunch and came back.Since they rarely carried a meal,the few metal lunch buckets on the market were mainly for tradesmen and factory workers.G)After World War II,a bunch of changes reshaped schoolsand lunches.More women joined theworkforce.Small schools consolidated into larger ones,meaning more students were farther awayfrom home.And the National School Lunch Act in 1946 made cafeterias much more common.Still,there wasn't much of a market for lunch containers-yet.Students who carried their lunch often did soin a re-purposed bucket or tin of some kind.H)And theneverything changed in the year of 1950.You might as well call it the Year of the Lunch Box,thanks in large part to a genius move by a Nashville-based manufacturer,Aladdin Industries.Thecompany already made square metal meal containers,the kind workers carried,and some had startedto show up in the hands of school kids.I)But thesecontainers were really durable,lasting years on end.That was great for the consumer,not somuch for the manufacturer.So executives at Aladdin hit on an idea that would harness the newfoundpopularity of television.They covered lunch boxes with'striking red paint and added a picture of TVand radio cowboy Hopalong Cassidy on the front.J)The company sold 600,000 units the first year.It was a major "Ah-ha!"moment,and a wave of othermanufacturers jumped on board to capitalize on new TV shows and movies."The Partridge Family,四级2020年12月48the Addams Family,the Six Million Dollar Man,the Bionic Woman-everything that was on televisionended up on a lunch box,"says Allen Woodall.He's the founder of the Lunch Box Museum inColumbus,Georgia."It was a great marketing tool because kids were taking that TV show to schoolwith them,and then when they got home they had them captured back on TV,"he says.K)And yes,you read that right:There is a lunch box museum,right near the Chattahoochee River.Woodall has more than 2,000 items on display.His favorite?The Green.Hornet lunch box,because heused to listen to the radio show back in the 1940s.L)The new trend was also a great example of planned obsolescence,that is,to design a product so that itwill soon become unfashionable or impossible to use and will need replacing.Kids would beg for a newlunch box every year to keep up with the newest characters,even if their old lunch box was perfectly.usable.M)The metal lunch box craze lasted until the mid-1980s,when plastic took over.Two theories exist as towhy.The first-and most likely-is that plastic had simply become cheaper.The second theory-possibly an urban myth-is that concerned parents in several states proposed bans on metal lunchboxes,claiming kids were using them as "weapons"to hit one another.There's a lot on the internetabout a state-wide ban in Florida,but a few days worth of digging by a historian at the Florida StateHistorical Society found no such legislation.Either way,the metal lunch box was out.N)The last few decades have brought a new lunch box revolution,of sorts.Plastic boxes changed to linedcloth sacks,and eventually,globalism brought tiffin containers from India and bento boxes fromJapan.Even the old metal lunch boxes have regained popularity.“Idon't think the heyday(最盛时期)has passed,"says D.J.Jayasekara,owner and founder of lunchbox.com,a retailer in Pasadena,California."I think it has evolved.The days of the ready-made,'you stick it in a lunch box and carryit to school'are kind of done."O)The introduction of backpacks changed the lunch box scene a bit,he adds.Once kids started carryingbook bags,that bulky traditional lunch box was hard to fit inside."But you can't just throw a sandwichin a backpack,"Jayasekara says."It still has to go into a container."That is,in part,why smaller andsofter containers have taken off-they fit into backpacks.P)And don't worry-whether it's a plastic bento box or a cloth bag,lunch containers can still easily becovered with popular culture."We keep pace with the movie industries so we can predict whichcharacters are going to be popular for the coming months,"Jayasekara says."You know,kids arekids.”36.Lunch containers were not necessary for school kids in cities.37.Putting TV characters on lunch boxes proved an.effective marketing strategy.38.Smaller lunch boxes are preferred because they fit easily.into backpacks.39.Lunch boxes have evolved along with the transformation of schools.40.Around the beginning of the nineteen fifties,some school kids started to use metal meal containers.41.School kids are eager to get a new lunch box every year to stay in fashion.42.Rural kids used to walk a long way to school in the old days.43.The author was proud of using a lunch box in her childhood.44.The most probable reason for the popularity of plastic lunch boxes is that they are less expensive.45.The durability of metal meal containers benefited consumers.四级2020年12月49Section CDirections:There are 2 passages in this section.Each passage is followed by some questions or unfinishedstatements.For each of them there are four choices marked A),B),C)andD).You should decide on thebest choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.Passage OneQuestions 46 to 50 are based on the following passage.A growing number of U.S.bike riders are attracted to electric bikes for convenience,health benefitsand their fun factor.Although ebikes first appeared in the 90s,cheaper options and longer-lastingbatteries are breathing new.life into the concept.Established bike companies and startups are embracing ebikes to meet demand.About 34 millionebikes were sold worldwide last year,according to data from eCycleElectric Consultants.Most were soldin Europe and China,where the bikes already have exploded in popularity.Recently,the U.S.markethas grown to 263,000 bikes,a 25%gain from the prior year.The industry is benefiting from improved batteries as suppliers over the years developed technologyfor laptops,smartphones and electric cars.In 2004,the price of batteries 'used on ebikes fell,spurringEuropean sales.But lower cost options are emerging,too.This month,three U.S.bikeshare companies,Motivate,LimeBike and Spin,announced electric bicycles will be added to their fleets.New York-based Jump Bikesis already operating an electric bikeshare in Washington,D.C.,and is launching in San FranciscoThursday.Rides cost 2 for 30 minutes.The system works like existing dockless bikeshare systems,where riders unlock bikes through asmartphone app."This is the beginning of a long-term shift away from regular pedal (to electricbikes,"said Jump Bikes CEO Ryan Rzepecki."When people first jump on an ebike,their face lights up.It's exciting and joyful in a way that you don't get from a regular bike."Two years ago,CEO Chris Cocalis of Pivot Cycles,which sells high-end mountain bikes,found thatU.S.bike shops weren't interested in stocking ebikes.Some retailers warned Cocalis that they'd drop thebrand if it came out with an electric bike.Now that sales are taking off,the vast majority of bike dealers are asking Cocalis when he'll make anebike available."There's tremendous opportunity to get a generation of people for whom suffering isn'ttheir thing,"Cocalis said."Ebike riders get the enjoyable part of cycling without the massive suffering ofclimbing huge hills..”46.What do we learn from the passage about ebikes?A)Their health benefits and fun values outweigh their cost.B)They did not catch public attention in the United States until the 1990s.C)They did not become popular until the emergence of improved batteries.D)Their widespread use is attributable to people's environmental awareness.47.What brought about the boost in ebike sales in Europe at the beginning of the century?A)Updated technology of bike manufacture.B)The falling prices of ebike batteries.C)Changed fashion in short-distance travel.D)The rising costs for making electric cars.四级2020年12月5048.What is the prospect of the bike industry according to Ryan Rzepecki?A)More will be invested in bike battery research.B)The sales of ebikes will increase.C)It will profit from ebike sharing.D)It will make a difference in people's daily lives.49.What prevented Chris Cocalis from developing ebikes sooner?A)Retailers'refusal to deal in ebikes.B)High profits from conventional bikes.C)Users'concern about risks of ebike riding.D)His focus on selling costly mountain bikes.50.What makes Chris Cocalis believe there is a greater opportunity for ebike sales?A)The further lowering of ebike prices.B)The public's concern for their health.C)The increasing interest in mountain climbing.D)The younger generation's pursuit of comfortable riding.Passage TwoQuestions 51 to 55 are based on the following passage.The terms "global warming"and "climate change"are used by many,seemingly interchangeably.Butdo they really mean the same thing?Scientists shaped the history of the terms while attempting'to accurately describe how humanscontinue to alter the planet.Later,political strategists adopted the terms to influence public opinion.In 1975,geochemist Wallace Broecker introduced the term "climate change".in an article publishedby Science.In 1979,a National Academy of Sciences report used the term "global warming"to defineincreases in the Earth's average surface temperature,while "climate change"more broadly referred to thenumerous effects of this increase,such as sea-level rise and ocean acidification ()During the following decades,some industrialists and politicians launched a campaign to sow doubt inthe minds of the American public about the ability of fossil-fuel use,deforestation and other humanactivities to influence the planet's climate.Word use played a critical role in developing that doubt.For example,the language and polls expertFrank Luntz wrote a memo encouraging the use of "climate change"because the phrase sounded less scarythan "global warming,"reported the Guardian.However,Luntz's recommendation wasn't necessary.A Google Ngram Viewer chart shows that by1993 climate change was already more commonly used in books than global warming.By the end of thenext decade both words were used more frequently,and climate change was used nearly twice as often asglobal warming.NASA used the term"climate change"because it more accurately reflects the wide range of changesto the planet caused by increasing amounts of greenhouse gases in the atmosphere.The debate isn't new.A century ago,chemist Svante Arrhenius started one of the first debates overthe potential for humans to influence the planet's climate.Arrhenius calculated the capability of carbondioxide to trap heat in the Earth's atmosphere,but other chemists disagreed.Some argued that humansweren't producing enough greenhouse gases,while others claimed the effects would be tiny.Now,of四级2020年12月51