2021年英语B级考试试题答案最新版.docx

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1、英语B级考试试题答案一、单项选取题（说明：这是我同窗给）1 How can we reduce the risk of cancer?A cut in B cut downC cut off D cut out2 The steadily rising cost of labor on the waterfront has greatly increased the cost of shipping cargo by water.A continuously B quicklyC excessively D exceptionally3 During the past ten years th

2、ere have been dramatic changes in the international sit uation.A permanent B powerfulC striking D practical4 The most crucial problem any economic system faces is how to use its scarce reso urces.A puzzling B difficultC terrifying D urgentWhat is it that makes Hammer who he is?What, for that matter,

3、 accounts for the tai ents and traits that make up anyone, s personality?Hammer is not content merely to ask s uch questions； he is trying to answer them as well. A pioneer in the field of molecular p sychology, Hammer is exploring the role genes play in governing the very core of our in dividuality

4、. To a remarkable exten, this work on what might be called the gay, thrill-seeki ng and quit-smoking genes reflects how own genetic predispositions.That work, which has appeared mostly in scientific journals, has been gathered into a n accessible and quite readable form in Hammer? s creative new boo

5、k, Living with Our G enes. you have about as much choice in some aspect of your personality. Hamer and co -author Peter Copeland write in the introductory chapter, “as you do in the shape of your nose or the size of your feet.Until recently, research into behavioral genetics was dominated by psychia

6、trists and ps ychologists, who based their most compelling conclusions about the importance of genes o n studies of identical twins. For exampL epsychologist Michael Bailey of Northwestern Un iversity famously demonstrated that if one identical twin is gay, there is about a 50% likelihood that the o

7、ther will be too. Seven years ag, o Hamer picked up where the twin studi es left off, homing in on specific strips of DNA that appear to influence everything from mood to sexual orientation.Hamer switched to behavioral genetics from basic research, after receiving his doctora te from Harvard, he spe

8、nt more than a decade studying the biochemistry of a protein that cells use to metabolize heavy metals like copper and zinc. As he was about to turn 40, however, Hamer suddenly realized he had learned as much about the protein as he cared to. Frankly, I was bored, “ he remembers, “and ready for some

9、thing new. ”Homosexual behavior, in particular, seemed ripe for exploration because few scientists had dared tackle such an emotionally and politically charged subject. “Im gay, “ Hamer s ays with a shrug, “but that was not a major motivation. It was more of a question of int ellectual curiosity一and

10、 the fact that no one else was doing this sort of researchv31 The first paragraph describes HamersA looks, hobbies and character.B viewpoint on homosexuality.C unique life-style.D scientific research work.32 Hamer was aA psychiatrist.B physiologist.C chemist.D biologist.33 What is Hamer doing now?A

11、He is exploring the role of genes in deciding one s intelligence.B He is exploring the role of genes in deciding one s personality.C He is writing a book entitled uLive with Our Genes.D He is trying to answer some questions on a test paper.34 What happened to Hamers research interest?A He turned to

12、basic research.B He sticked to basic research.C He turned to behavioral genetics.D He sticked to behavioral genetics.35 According to Hamer, what was one of the main reasons for him to choose homos exual behavior as his research subject?A He is a gay and he wants to cure himself.B He was curious abou

13、t it as a scientist.C He was curious about it like everyone else.D It is a subject that can lead to political success.第二篇Silent and DeadlyTransient ischemic attacks(TIAS) , or mini-strokes, result from temporary interruptions of blood flow to the brain. Unlike full strokes, they present symptoms las

14、ting anywhere fr om a few seconds to 24 hours. Rarely do they cause permanent neurological damage, but they are often precursors of a major stroke.“Our message is quite clear, “ says Dr. Robert Adams, professor of neurology at the Medical College of Georgia in August. TIAS, while less severe than st

15、rokes in the short term, are quite dangerous and needa quick diagnosis and treatment as well as appropriate follow-up to prevent future injury.Unfortunately, mini-strokes are greatly under diagnosed. A study conducted for the Na tional Stroke Association indicates that 2. 5% of all adults aged 18 or

16、 older(about 4. 9 milli on people in the U. S. )have experienced a confirmed TI A. An additional 1. 2 million A mericans over the age of 45, the study showed, have most likely suffered a mini-stroke w ithout realizing it. These findings suggest that if the public knew how to spot the sympto ms of st

17、rok, e especially mini-strokes, and sought prompt medical treatment, thousands of li ves could be saved and major disability could be avoided.The problem is that the symptoms of amini-stroke are often subtle and passing. Non etheless, there are signs you can look out for:Numbness or weakness in the

18、face, arm or leg, especially on one side of the body.*Trouble seeing in one or both eyes.*Confusion and difficulty speaking or understanding.Difficulty walking, dizziness or loss of coordination.Severe headache with no known cause.Along with these symptoms, researchers have identified some key indic

19、ators that incre ase your chances of having a full-blown stroke after a TI： Aif you re over 60, have exper ienced symptoms lasting longer than 10 minute, s feel weak and have a history of diabete s.As with many diseases, you can help yourself by changing your lifestyle. The first th ings you should

20、do are quit smoking, limit your intake of alcohol to no more than a drin k or two a day and increase your physical activity. Even those who suffer from high bio od pressure or diabetes can improve their odd-sand minimize complications if they do ha ve a stroke一by keeping their illness under control.

21、If you experience any of the symptoms, your first call should be to your doctor. It c ould be the call that saves your life.36 Which of the following is NOT true of mini-strokes?A The cause of them remains unidentified.B They seldom cause permanent neurological damage.C They symptoms of them are oft

22、en passing.D They are not unrelated to major strokes.37 To prevent mini-strokes from turning into major strokes, it is important toA save thousands of lives.B avoid major disability.C seek prompt medical treatment.D prevent future injury.38 The passage indicates that the symptoms of mini-strokesA ar

23、e always easy to spot.B are frequently hard to recognize.C usually last a couple of days.D can by no means be avoided.39 All of the following may be signs of mini-strokes EXCEPT forA trouble seeing in one eye.B numbness in the face.C loss of coordination.D severe headache caused by external injury.4

24、0 It can be inferred from the passage that mini-strokes areA more dangerous than major strokes.B silent and deadly.C difficult t。 cure.D sure to lead to major strokes.第二篇Road Trip VacationsIt s summer. In the United States, it s the season of swimming pools, barbeques, cam ping and road trips.Road t

25、rip vacations where the car journey is part of the fun are especially popular w ith college students, who like to explore the country on wheels. These budget trips are id eal for students who often have plenty of free time but little money.Ever since I went to college, F ve been traveling around a l

26、ot, exploring the country, sai d Austin Hawkins, a 19-year-old college student from New York. This summer, Hawkins and his friends have spent weekends traveling in New England.The best part about car trips, said Hawkins, is that you can be spontaneous. 0n a r oad trip, if you get interested in thing

27、s you see along the way you can stop and explore. Matt Roberts, a 20-year-old student from Ohio who drove to Montrea, 1 Canada, agree s. With road trips you dont have to plan in advanc, eyou can just get into a car and dri ve.Even with high gas prices, driving with friends is cheaper than flying. Ro

28、berts paid a bout 40 dollars for gas, but a round trip plane ticket would have cost nearly 400 dollars.Driving trips first became popular in the 1920s. Newly paved roads and improved, ca rs made it possible to travel longer distances. Motels started appearing outside cities.By the 1950s, car ownersh

29、ip became the norm. Construction of the US interstate high way system began in 1956 and motel and restaurant chains popped upl everywhere makin g long distance trips easier.Today, the US has the highest car ownership rate in the world. Only 8 percent of A merican homes have no car, according to the

30、most recent US census.Though many college students don t own a car, most have access to one. On many o f Hawkins trips, they used a borrowed van.Hawkins most memorable road trip took place over spring break. He and two friends drove from New York to New Orleans to voluntee, rhelping rebuild the city

31、 after Hurric ane Katrina hit it last July. They crossed the country in two days and slept in their car i n church parking lots.Roberts road trip to Canada last winter was even more eventful. Upon arriving in M ontreal, they were lost in a blizzard and shivering in the25- cold. To find their hotel,

32、the y turned on a laptop and drove around in circles until they found a spot with wireless Int ernet coverage.I know we should have planned better, but we re young. Now, when I see thosegu ys I always say： Remember when we were lost in the snow storm! ? I 11 never forget that.41 Which of the followi

33、ng statements is NOT true of American college students?A They have little money.B They like traveling by bike.C They like to explore the country.D They often have plenty of free time.42 What will Hawkins do when he sees something interesting on a road trip?A He will turn back.B He will drive around.

34、C He will stop to explore.D He will stop exploring.43 When did motels suddenly appear?A After the work to build the interstate highway system started.B When driving trips became popular.C After many roads were paved.D After new cars were made.44 Which of the following words can best describe Hawkins

35、 trip to New Oriends?A Eventful.B Colourful.C Delightful.D Unforgettable.45 The word blizzard in paragraph 12 can be replaced byA snowstorm.B hurricanEC mist.D fog.五、补全短文。补全短文。Looking to the future5 His new girlfriend had omitted to tell him that she was married.A failed B deletedC refused D rejecte

36、d6 The substance can be added to gasoline to accelerate the speed of automobiles.A quicken B shortenC loosen D enlarge7 We should never content ourselves with a little knowledge only.A convince B satisfyC comfort D benefit8 We should contemplated the problem from all sides.A deliberated B thoughtC d

37、escribed D designed9 His health had deteriorated while he was in prison.A became better B became worseC became stronger D became weakerWhen a magazine for high-school students asked its readers what life would be like i n twenty years, they said： Machines would be run by solar power. Buildings would

38、 rotate so they could follow the sun to take maximum advantage of its light and heat. Walls w ould “radiate lightv and uchange color with the push of a button. food would be replac ed by pills._46_. Cars would have radar. Does this sound like the year ?47The future is much too important to simply gu

39、ess about, the way the high school stu dents did, so experts are regularly asked to predict accurately. 48 . But can they?0ne expert on cities wrote： cities of the future would not be crowded, but would have space for farms and fields. People would travel to work in uairbusesn , large all-weather he

40、licopte rs carrying up to 200 passengers. When a person left the airbus station he could drive a coin-operated car equipped with radar. The radar equipment of cars would make traffic ac cidents almost unheard of” , Does that sound familiar?If the expert had been accurate it would, because he was wri

41、ting in 1957. his subject was “The city of 1982” .If the professionals sometimes sound like high-school students, it s probably because f uture study is still a new fielD But economic forecasting, or predicting what the economy will do, has been around for a long timE It should be accurate, and gene

42、rally it is. But there have been some big mistakes in this field, too. _49_. In October of that year, the stock market had its worst losses ever, ruining thousands of investors who had put their faith in financial foreseers.50 . In 1957, H. J. Rand of the Rad Corporation was asked about the year, “O

43、nly one thing is certain, “ he answereD uChildren will have reached the age of 43.”A By carefully studying the present, skilled businessmen scientists, and politicians are supposedly able to figure out in advance what will happen.B School would be taught “by electrical impulse while we sleep. C One

44、forecaster knew that predictions about the future would always be subject to s ignificant errors.D In early 1929, most forecasters saw an excellent future for the stock market.E Everyone may look to the future for it is always promising.F Actually, the article was written in 1958 and the question wa

45、, s “what will life be 1 ike in 1978?”六、完型填空。.完型填空。Happy Marriage, Happy HeartHappily married people have lower blood pressure 51 unhappily married people or singles, a Brigham Young University study says.On the other hand, even having a supportive social network did not translate into a b lood pres

46、sure benefit for singles or unhappily _52 peoplel, according to the study.“There seem to be some unique health benefits from marriagE It s not just being mar ried53benefits health - what s really the most protective of health is having a happ y 54 study author Julianne Holt-Lunstad, a psychologist w

47、ho specializes in relati onships and health, said in a prepared statement.The study included 204 married and 99 55 adults who wore portable bloodpressure monitors for 24 hours. The56 recorded blood pressure at random interval s and provided a total of about 72 readings.We wanted to capture participa

48、ntsblood pressure doing whatever they normally 57in everyday lifE Getting one or two readings in a clinic is not really58of t he fluctuations that occur throughout the day, 4 Holt-Lunstad said.Overall, happily married people scored four points59on the blood pressure re adings than single adults. The study also found that blood 60 among married peopl e - especially those in happy marriages 61 more during sleep than in single peopl e.Research has shown that people whose blood pressure remains high throughout the night are at62greater risk of