1、Unit 4 A glimpse of the future 检测题本试卷满分120分,考试时间100分钟。第一部分 阅读(共两节,满分50分）第一节 (共15小题; 每小题2.5分, 满分37.5分）阅读下列短文,从每题所给的A,B,C,D四个选项中选出最佳选项。A The traffic signals along Factoria Boulevard in Bellevue, Washington, generally dont flash the same length of green twice in a row, especially at rush hour. At 9:30
2、am, the full red/yellow/green signal cycle might be 140 seconds. By 9:33 am, a burst of additional traffic might push it to 145 seconds. Less traffic at 9:37 am could push it down to 135. Just like the traffic itself, the timing of the signals changes. That is by design. Bellevue, a fast-growing cit
3、y just east of Seattle, uses a system that is gaining popularity around the US: intersection(十字路口) signals that can adjust in real time to traffic conditions. These lights, known as adaptive signals, have led to significant declines in both the trouble and cost of travels between work and home. Adap
4、tive signals can make sure that the traffic demand that is there is being addressed, says Alex Stevanovic, a researcher at Florida Atlantic University. For all of Bellevues success, adaptive signals are not a cure-all for jammed roadways. Kevin Balke, a research engineer at the Texas A&M University
5、Transportation Institute, says that while smart lights can be particularly beneficial for some cities, others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference. Its not going to fix everything, but adaptive signals have some benefits for sm
6、aller cities, he says. In Bellevue, the switch to adaptive signals has been a lesson in the value of welcoming new approaches. In the past, there was often an automatic reaction to increased traffic: just widen the roads, says Mark Poch, the Bellevue Transportation Departments traffic engineering ma
7、nager. Now he hopes that other cities will consider making their streets run smarter instead of just making them bigger.1.What does the underlined word That in Paragraph 2 refer to?A.Increased length of green lights.B.The shortened traffic signal cycle.C.Flexible timing of traffic signals.D.Smooth t
8、raffic flow on the road.2.What does Kevin Balke say about adaptive signals?A.They work better on broad roads.B.They should be used in other cities.C.They have greatly reduced traffic on the road.D.They are less helpful in cities seriously jammed.3.What can we learn from Bellevues success?A.It is rew
9、arding to try new things.B.The old methods still work today.C.It pays to put theory into practice.D.The simplest way is the best way.BPatrick never does homework. “Too boring，”he says. He always plays baseball and basketball after school. His teachers tell him, “Patrick! Do your homework, or you can
10、t learn anything. ”But what can he do? He hates homework. One day，his cat was playing with a little “ doll”. He found it wasnt a doll at all，but a man of the smallest size. The man called，“Save me! Dont give me back to that cat. I have magic. I will help you if you save me!” How lucky he was! Here w
11、as the answer to all of his problems. So he said，“ If you help me to do my homework until the last day of school, I will get good grades. ”The man agreed. He began to do Patricks homework. The man didnt always know what to do and he needed help. “Help me! Help me! ”he said. And Patrick had to help.
12、Day after day，Patrick had to work harder. Finally the last day of school arrived and the man was free to go. As for homework，Patrick didnt hate doing it any more. Patrick got his As. His teachers and classmates were all surprised. Who really helped Patrick?1.Patrick likes after school.A. doing sport
13、sB. doing some readingC. doing his homework D. learning things2. What does the sentence “Patrick got his As” mean?A. It means “Patrick got the teachers help”.B. It means “Patrick got good grades”.C. It means “Patrick got more friends”.D. It means “Patrick got more problems”.3. Which of the following
14、 is not true?A. Patrick never hates doing his homework.B. The man sometimes didnt know what to do when he helped Patrick.C. The man didnt go until the last day of school.D. Patrick finally started to like doing homework.4. From the passage, we can know .A. the man liked to play with the catB. the ma
15、n never helped Patrick do his homeworkC. Patricks classmates always helped him do his homeworkD. in fact, Patrick helped himselfC Space is where our future istrips to the Moon, Mars and beyond. Most people would think that aside from comets(彗星) and stars, there is little else out there. But, since o
16、ur space journey started we have left so much trash (垃圾) there that scientists are now concerned that if we dont clean it up, we may all be in mortal(致命的) danger. The first piece of space junk was created in 1964, when the American satellite Vanguard I stopped operating and lost its connection with
17、the ground center. However, since it kept orbiting around the Earth without any consequences, scientists became increasingly comfortable abandoning things that served no useful purpose in space. It is estimated (估计) that there are now over 500,000 pieces of man-made trash orbiting the Earth at the s
18、peed of up to 17,500 miles per hour. The junk varies from tiny pieces of paint chipped off rockets to cameras, huge fuel tanks, and even odd items like the million-dollar tool kit that astronaut Heidemarie Stefanyshyn Piper lost during a spacewalk. The major problem with the space trash is that it m
19、ay hit working satellites and damage traveling spacecraft (飞船). Moreover ,pieces of junk may collide (碰撞) with each other and break into pieces which fall back to the Earth. To avoid this, scientists have invented several ways for clearing the sky. Ground stations have been built to monitor larger p
20、ieces of space trash to prevent them from crashing into working satellites or space shuttles. Future plans include a cooperative effort among many nations to stop littering in space and to clean up the trash already there.1.What was the first piece of man-made space trash?A. A camera.B.A tool kit.C.
21、A broken satellite.D.A fuel tank.2.Why were scientists NOT concerned about space trash in the beginning?A. It did not cause any problems.B. It served no useful purpose.C. It was millions of miles away from the Earth.D. It was regarded as similar to comets and stars.3.Which of the following statement
22、s is true about space junk?A. It is huge, heavy machines.B. It may cause problems for space shuttles.C. It floats slowly around the Earth.D. It never changes the position.4.What has been done about the space trash problem?A. Ground stations are built to help store the trash properly in space.B. Many
23、 nations have worked together to stop polluting space.C. Large pieces of space trash are being closely watched.D. Scientists have cleaned up most of the trash.D The baby is just one day old and has not yet left hospital. She is quiet but alert. Twenty centimeters from her face researchers have place
24、d a white card with two black spots on it. She stares at it carefully. A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, her gaze starts to lose its focusuntil a third, with three black spots, is presente
25、d. Her gaze returns: she looks at it for twice as long as she did at the previous card. Can she tell that the number two is different from three, just 24 hours after coming into the world? Or do newborns simply prefer more to fewer? The same experiment, but with three spots shown before two, shows t
26、he same return of interest when the number of spots changes. Perhaps it is just the newness? When slightly older babies were shown cards with pictures of objects (a comb, a key, an orange and so on), changing the number of objects was different from changing the objects themselves in effect. Could i
27、t be the pattern that two things make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three, or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited
28、 when they then heard three drumbeats than when they heard just two; likewise when the researchers started with drumbeats and moved to spots.1.The experiment described in Paragraph 1 is related to the babys _.A. sense of hearingB. sense of sightC. sense of touchD. sense of smell2.Babies are sensitiv
29、e to the change in _.A. the number of objects.B. the colour of pictures.C. the shape of patterns.D. the size of cards.3.Why did the researchers test the babies with drumbeats?A. To reduce the difficulty of the experiment.B. To see how babies recognize sounds.C. To carry out their experiment further.
30、D. To keep the babies interest.4.Where does this text probably come from?A. Science fiction.B. Childrens literature.C. An advertisement.D. A science report.第二节 (共5小题;每小题2.5分,满分12.5分）阅读下面短文, 从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。 Radar is an electronic device that detects planes, ships, coastlines, land
31、marks, and even storm clouds. The name radar comes from the first letters of the words radio direction and ranging. As the human eye uses light waves to see, radar sees with radio waves. Without radar, planes could not land safely in bad weather and ships could not move safely in thick fog. _ In the
32、 1800s it was discovered that radio waves could be reflected from objects. But scientists did not make great advances in radar research until the 1930s, when the world was threatened by war. _ It has been used widely in almost every conflict(冲突) since then. Echoes make it possible for radar to work.
33、 When a beam of radio waves is sent out, it strikes an object and returns an echo. This echo is picked up by radar and recorded on a screen similar to television screens. On the screen an observer sees a flash and that can show the direction and distance of the object. _ Airport control towers use r
34、adar to guide planes in for safe landings. Almost all large ships depend on radar to prevent collisions with icebergs or other ships. _ Weather forecasters see the size, direction, and speed of storms on radar screens. Astronomers can even use radar to measure accurately the distance from the earth
35、to the moon. Thus, the device has helped achieve major advancements. _It guards us against possible enemy attacks. We have ballistic missile(弹道导弹) warning systems that can warn us against attacks when missiles are more than 1,000 miles away. Other radar systems can also warn us against enemy aircraf
36、t and even spying space satellites. A.The measurement is now highly accurate. B.Police track speeders in radar-equipped cars. C.The device can be used in a wide range of fields. D.It is therefore especially valuable to shippers and travelers. E.During World War H many countries used radar effectivel
37、y. F.Today radar is used by commercial airliners and weather forecasters. G.Strengthening national defense is one of radars most important functions.第二部分 语言运用 (共两节,满分30分）第一节 (共15小题; 每小题1分, 满分15分） When I was a boy I dreamed of my future. I was going to be a cowboy. Then I dreamed of being a firefight
38、er and 1 people from burning buildings. I just couldnt 2 to grow up and be an adult. After I went to college and those dreams 3 . I thought I would be a scientist, then I switched to being a teacher. When I 4 and had children, my dreams of the future changed again. Now it wasnt a 5 career that I dre
39、amed of but a time when I could be settled and 6 . That dream, of course, didnt 7 . In fact, none of those dreams ever came to life. It took me many years as well to 8 that living in a dreamy future was living in a 9 and that each moment I spent there was taking a moment away from the 10 NOW. I saw
40、that there could be no perfect, problem-free future because problems are part of 11 . It is only in the NOW that we can truly live. Our dreams for the future are just that: 12 . Whether they come true or not isnt as 13as how we live each day here. A hug shared today can never be 14 . An act of kindn
41、ess not given now is lost forever. A moment of love missed can never be 15 again. Each second of the NOW is precious and priceless. Dont waste any one of them.1.A. liberatingB. carryingC. rescuingD. supporting2.A. waitB. stop C. stay D. rest3.A. remainedB. matchedC. brokeD. changed4.A. retiredB. mar
42、riedC. succeededD. divorced5.A. certainB. firmC. promisingD. professional6.A. silentB. gentleC. secureD. uncertain7.A. loseB. happenC. produceD. destroy8.A. recognizeB. appreciateC. concludeD. realize9.A. hopeB. fantasyC. fableD. sight10.A. preciousB. favoriteC. commonD. popular11.A. activitiesB. mo
43、vementC. lifeD. business12.A. realitiesB. dreamsC. purposesD. treasures13.A. famousB. seriousC. impressiveD. important14.A. replacedB. followedC. recoveredD. reviewed15.A. picked upB. broken upC. made upD. put up第二节 (共10小题;每小题1.5分,满分15分）在空白处填入1个适当的单词或括号内单词的正确形式。 Is artificial intelligence the greate
44、st human achievement or the biggest threat to our _ (exist)? People in the Technology of Tomorrow Forum have different views. Millenniumbutterfly thinks that his daily life is more_(convenience) with the advance of artificial intelligence. For example, he has got his super-smart personal assistant_(
45、build) into his phone. The assistant answers any question he puts to her_(immediate) and even uses his answers_(learn) more about his preferences. He hopes that more breakthroughs in AI will be made soon, so that people can enjoy more and more benefits. Popkid admits that more advanced AI could be h
46、elpful in_ (solve) the worlds problems, _ there is a high level of risk involved. Actually none of us is_(prepare) for the challenges of AI. In Pink_hazes opinion, people all need to coexist_ AI technology whether they like it or not. We have no choice but_(embrace) and regulate it.第三部分 写作(共两节,满分40分）第一节 (满分15分) 假定你是李华,现在在美国一所高中做交换 生,晚上你经常去学校的阅览室看书,发现阅览室 里存在不文明现象。请你给阅览室管理员 Smith 先生写一封信,要点如下: 1.现象(阅览室太吵,垃圾比较多); 2.整改措施。 注意:1.词数80左右; 2.可以适当增加细节,以使行文连贯。_第二节 (满分25分）阅读下面材料, 根据其内容和所给段落开头语续写两段, 使之构成一篇完整的短文。续写的词数应为150左右。I
