高中二年级英语精选练习题

2021届高二英语练习十一一：完形填空(共20小题；每小题1分，满分20分)请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。

All of us have been in different situations. Now 36 back to two situations from your past, one pleasant and the other unpleasant. 37 carefully whether you relive (再体验) them or just recall them. If you relive them, and 38 the same emotions as if you are undergoing the same situations again, you are39 associated with the incidents. If you can objectively recall the incidents in the past, it’s 40 that you are dissociated (使分离) from the incidents.Now how do association and dissociation 41 us in our life?The simple 42 I prefer to follow is to associate with positive things in life and dissociate from the 43 ones. Few months ago, my friends and I went to the Ooty hill station. One of my friends, Amy, had been to Ooty before, had a wonderful time there, and 44 the beauty of nature. The only unpleasant thing was that her ring fell into the 45 . When we decided to take a boat ride, Amy was not willing to 46 us, as she had associated the 47 with that unpleasant memory before closely. 48 she had so many other very pleasant memories of her previous 49 , she had closely 50 that unpleasant incident to heart and relived the same old incident. We could see her 51 the same situation she had when her ring was lost. If she had dissociated herself from that unpleasant incident, she could have figured out a way to keep the 52 safe during such a boat ride and had 53 .If you see people who are 54 , they may have dissociated from their positive experiences and associated with the negative ones. Learning to make a good 55 of which to associate and which to dissociate will make our life better.36. A. date B. go C. turn D. think37. A. Achieve B. Perform C. Observe D. Explain38. A. experience B. understand C. describe D. watch39. A. certainly B. quickly C. actively D. gradually40. A. possible B. clear C. fair D. lucky41. A. support B. attract C. protect D. help42. A. order B. result C. rule D. policy43. A. dangerous B. simple C. useless D. negative44. A. remembered B. missed C. enjoyed D. watched45. A. lake B. field C. forest D. castle46. A. aid B. join C. accept D. ask47. A. trip B. stage C. task D. trick48. A. Though B. But C. Unless D. Or49. A. research B. plan C. project D. visit50. A. brought B. put C. given D. taken51 A. going through B. looking after C. figuring out D. comparing to52. A. goods B. valuables C. materials D. resources53. A. fun B. time C. honor D. freedom54. A. tired B. frightened C. embarrassed D. depressed55. A. offer B. wish C. choice D. start二: 阅读理解(共15 小题; 每小题2 分, 满分30 分)请认真阅读下列短文, 从短文后各题所给的A、B、C、D 四个选项中, 选出最佳选项, 并在答题卡上将该项涂黑。

ACamp Woodmen 2017Camper Age Range:12 to 18Camper Tuition: $260 (if payment is postmarked(盖邮戳于) on or before Monday, June 12, 2017); $290 after June 12.Staff Tuition:no chargeWhere:Blountsville, Alabama (northern Alabama)Dates & TimesStaff members should check in on Saturday, July 22. Staff training is scheduled for that evening and Sunday morning. Specific details will be sent later to all staff members accepted.Camper registration will occur from 2 pm to 4 pm on Sunday, July 23. Check-out and departure for everyone will be from 9 am to 10 am on Sunday, July 30.TransportationTransportation will be provided to/from Birmingham-Shuttlesworth International Airport (BHM).Staff NeedsWe are always on the lookout for staff members who hold current certifications in nursing, lifeguarding, first aid, and CPR. Questions about specific staff needs should be sent to the camp director. Participants can expect a well-structured and safe program that offers challenging activities and the opportunity to develop lifelong friendships.ApplicationsTo apply to Camp Woodmen, or for more details, visit the website: .Once the application is in, you will receive an email to upload a recent picture of the camper. You will also receive an email to fill out the signature form. Please get these electronic forms filled out quickly. It will help immensely!PaymentPayment needs to be postmarked by June 12th. There will be a late fee of $30 for late payment. If the camper is not accepted, your check will not be deposited. If you have questions about payment please email before the payment due date (June 12, 2017).We look forward to a wonderful Camp Woodmen 2017!Shawn Cortelyou, Camp Directorscortlu@309-973-636256. A camper will stay at Camp Woodmen for ____.A. 7 daysB. 7 nightsC. 8 nightsD. 9 days57. What can we learn about Camp Woodmen 2017?A. Anybody is welcome to join the camp staff.B. Staff members are supposed to pay half of the fee.C. Early payment will give a camper a generous discount.D. Staff members will get a training for a whole day on June 23.BCan electricity cause cancer? In a society that literally runs on electric power, the very idea seems ridiculous. But for more than a decade, a growing band of scientists and journalists has pointed to studies that seem to link exposure to electromagnetic fields(电磁场) with increased risk of leukemia(白血病) and other malignancies. The implications are unsettling, to say the least, since everyone comes into contact with such fields, which are generated by everything electrical, from power lines and antennas to personal computers and micro-wave ovens. Because evidence on the subject is inconclusive and often contradictory, it has been hard to decide whether concern about the health effects of electricity is reasonable --- or a kind of oversensitivity.Now the alarmists have gained some qualified support from the U.S. Environmental Protection Agency. In the executive summary of a new scientific review, released in draft form late last week, the EPA has put forward what amounts to the most serious government warning to date. The agency tentatively concludes that scientific evidence “suggests a causal(因果关系的) link” between extremely low-frequency electromagnetic fields (ELF) ---those having very longwave-lengths ---and leukemia, lymphoma and brain cancer. While the report falls short of classifying ELF fields as probable carcinogens(致癌物), it does identify the common 60-hertz magnetic field as “a possible, but not proven cause of cancer in humans.”The report is no reason to panic --- or even to lost sleep. If there is a cancer risk, it is a small one. The evidence is still so controversial that the draft stirred a great deal of debate within the Bush Administration, and the EPA released it over strong objections from the Pentagon and the White House. But now no one can deny that the issue must be taken seriously and that much more research is needed.At the heart of the debate is a simple and well-understood physical phenomenon: When an electric current passes through a wire, it generates an electromagnetic field that exerts forces on surrounding objects. For many years, scientists dismissed any suggestion that such forces might be harmful, primarily because they are so extraordinarily weak. The ELF magnetic field generated by a video terminal measures only a few milligauss, or about one-hundredth the strength of the earth’s own magnetic field. The electric fields surrounding a power line can be as high as 10 kilovolts per meter, but the corresponding field induced in human cells will be only about 1 millivolt per meter. This is far less than the electric fields that the cells themselves generate.How could such minuscule(极小的) forces pose a health danger? The consensus used to be that they could not, and for decades scientists concentrated on more powerful kinds of radiation, like X-rays, that pack sufficient wallop to knock electrons out of the molecules that make up the human body. Such “ionizing” radiations have been clearly linked to increased cancer risks and there are regulations to control emissions.But epidemiological(流行病学的) studies, which find statistical associations between sets of data, do not prove cause and effect. Though there is a body of laboratory work showing that exposure to ELF fields can have biological effects on animal tissues, a mechanism by which those effects could lead to cancerous growths has never been found.The Pentagon is far from persuaded. In a blistering 33-page critique of the EPA report, Air Force scientists charge its authors with having “biased(使倾向于) the entire document” toward proving a link.“Our reviewers are convinced that there is no suggestion that (electromagnetic fields) present in the environment induce or promote cancer,” the Air Force concludes. “It is astonishing that the EPA would approve the release of this report.” Then Pentagon’s concern is understandable. There is hardly a unit of the modern military that does not depend on the heavy use of some kind of electronic equipment, from huge ground-based radar towers to the defense systems built into every warship and plane.58. The main idea of this passage is _______.A. studies on the cause of cancerB. controversial view-points in the cause of cancerC. the relationship between electricity and cancer.D. different ideas about the effect of electricity on caner.59. It can be inferred from physical phenomenon _______.A. the force of the electromagnetic field is too weak to be harmful.B. the force of the electromagnetic field is weaker than the electric field that the cells generate.C. electromagnetic field may affect health.D. only more powerful radiation can knock electron out of human body.60. Why did the Pentagon and White House object to the release of the report? Because _______.A. it may stir a great deal of debate among the Bush Administration.B. every unit of the modern military has depended on the heavy use of some kind of electronicequipment.C. the Pentagon’s concern was understandable.D. they had different arguments.CThe average American’s carbon footprint shrinks the Arctic sea ice. Not by a little. By a lot — about the area covered by 16 queen-size beds. And that happens each year. A carbon footprint is the number of tons of CO2 a person produces in his daily activities. An average American produces about 16 tons of CO2each year. Each ton of this CO2released into the atmosphere directly results in a 3-square-meter loss of sea ice cover at summer’s end. That’s similar to losing an area of ice just a bit smaller than a two-seat Smart car, scientists say.“For the first time, it is possible to grasp how each of us contributes to the consequences,” says Dirk Notz, a climate scientist at the Max Planck Institute for Meteorology in Hamburg, Germany. Unfortunately, there are some 7 billion people contributing.Altogethe r, humanity is responsible for the release of some 36 billion tons of CO₂ each year. With another trillion tons, the Arctic Ocean will have a completely iceless summer.This might be the first time the summer Arctic has been ice-free in 125,000 years. And it could happen before 2050, Notz estimates. The estimate contradicts many previous studies. Those other studies projected that summertime ice in the Arctic would stick around for far longer.How quickly the summer ice would continue to decrease remained unclear. So Notz decidedto estimate how soon it could be completely gone. To do that, she analyzed records of the Arctic sea surface temperatures and the minimum sea area covered by summer ice. She and her team looked at records going way back to 1953. The average ice cover by the end of September had dropped. And it fell in lockstep (一致) with the rising releases of CO2 from human activities, the team found.The researchers think they now understand the relationship. As CO2builds up in the atmosphere, it strengthens the so-called greenhouse effect. This is where certain gases in the atmosphere, such as CO2 and methane, trap some of the sun’s heat. As CO2 levels climb, less of the sun’s heat bounces back into space. Instead, it remains trapped near Earth’s surface. This increases the amount of ice-warming infrared radiation (红外辐射) hitting the Arctic. That causes the outermost edge of the sea ice to withdraw northward, moving away from the shore.Decreasing ice at the top of the world is significant to watch. Its disappearance threatens the Arctic species.Its melting also can spread pollution. Besides, disappearing ice could open the region to polar shipping.61. From the first two paragraphs we learn that ______.A. on average Americans release the most CO2B. most people have no idea what a carbon footprint isC. common people can’t do much to reduce the release of CO2D. our daily activities greatly contribute to the ice loss of the Arctic sea62. What do we know about Dirk Notz’s finding?A. It is the first study on the Arctic sea ice.B. It doesn’t agree with many previous studies.C. It offers a good way to deal with the problem.D. It is considered inaccurate by many other scientists.63. What is Paragraph 5 mainly about?A. Where the Arctic sea ice will end up being.B. Why CO2 emissions lead to the Arctic sea ice loss.C. Why the build-up of CO2 threatens the environment.D. What has caused the temperature in the Arctic sea to increase.64. What is the best title of the passage?A. The Arctic sea has been losing its iceB. The Arctic sea could be ice-free by 2050C. Carbon footprints shrink the Arctic sea iceD. The greenhouse effect causes global warmingDChanging technology stimulates(刺激) the brain and increases intelligence. But that may only be true if the technology challenges us. In a world run by intelligent machines, our lives could get a lot simpler. Would that make us less intelligent?After the Industrial Revolution, machines began to replace manual workers. The process played out in agriculture as well as manufacturing so that groups of agricultural workers were replaced and forced to move to cities to make a living.When machines took away much of the manual work, people became less physically active and gained weight. The sedentary (久坐的) lifestyle contributed to a worldwide spreading of overweight and related metabolic disorders such as heart disease, secondary diabetes and kidneydisease .As our bodies rested, our brains were forced to work harder, however. It is much more difficult to drive through an overcrowded modern city than it is to move around in a small rural village, for instance. Modern jobs are also more complex and urgent and they require more education because employees need to process new information quickly. Even during our leisure time, our brains work harder due to greater availability of books and explosion of audiovisual media, for entertainment, study, music, news, a nd so forth.Now in the Internet age, the amount of information grows fast along with the advance of electronic technologies. The number of people with whom we interact electronically grows by leaps and bounds thanks to the ease of use of social media like Facebook and Twitter.All of this extra work for our brains makes us more intelligent. That helps explain why human intelligence increases steadily from generation to generation in all developed countries, a phenomenon named the Flynn Effect. Of course, there are other reasons, including improved nutrition, better medical practices that reduce brain damage, and improved sanitation and public health that reduce diseases of childhood.In the P.G Wodehouse novels, Bertie Wooster got away with being a fool because Jeeves was there to back him up with superior brain power. Similarly, people of the future are at risk of being less intelligent because machines will do their thinking for them.Artificial intelligence is taking over many human jobs. For instance, planes are being flown much of the time by automatic pilots. Moreover, the complex problem of controlling air traffic around large modern airports is also achieved by artificial intelligence that operates well beyond the capability of mere human air traffic controllers.Artificial intelligence exists in many fields of modern life for the simple reason that intelligent machines can already outperform humans, including some aptitudes (天资) which were once thought to be a human advantage, such as playing chess or recalling details in a game of Jeopardy.Machine intelligence is increasing much faster than human intelligence. As machines get smarter, they will do more of our thinking for us and make life easier.Instead of struggling to identify ourselves to some electronic system via passwords that are secure only if they are hard to remember, the system will work harder to identify us using biometrics(生物测定学) such as fingerprints or even the individual sound of our hearts. More technologies of the future may also be voice-activated so that we will talk with machines much as we would talk to a friend.In the future, the electronic assistant will develop to the point where it serves similar functions as a real living chief male servant of a house, fulfilling request s such as: “Organize a dinner party for six on Thursday, Jeeves, and invite the usual guests .”At that point, our long struggle with challenging technologies is at an end. Like Bertie Wooster, we can take it easy knowing that the hard work of planning and organizing is being done by a better brain—the electronic assistant. Starved of mental effort, our brains will return to an earlier or less advanced form.The future is still in the fog.65. According to the author, the Industrial Revolution led to ________.A. the development of educationB. the spread of diseases in the worldC. a lifestyle of being physically activeD. people’s physical and mental problems66. The Flynn Effect refers to the phenomenon that ________.A. extra work can stimulate our brainB. humans are becoming smarter and smarterC. the change in human intelligence is steadyD. people in developed countries have higher intelligence67. The writer gave the example of Bertie Wooster to tell us ________.A. the possibility of humans' becoming less intelligentB. the risk of machines ' destroying the worldC. the end of challenges people face in lifeD. the powerful functions of technologies68. Why is artificial intelligence popular in our life?A. It can improve and update itself.B. It can take advantage of humans.C. It can do much better than humans.D. It can deal with abstract information.69. We can infer from the passage that electronic systems ________.A. will make trouble in our daily lifeB. will function as the master of humansC. will become more user-friendly in the futureD. will be deserted because of their inconvenience70. Which of the following is the best title for the passage?A. The future is bright due to artificial intelligence. B .Will machines replace manual workers?C. Humans will develop electronic assistants.D. Can artificial intelligence make us stupid?。