The world itself is becoming much smaller by using modern traffic and modern communication means. Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest problems is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.
Man has been polluting the earth.The more people，the more pollution.Many years ago，the problem was not so serious because there were not so many people.When the land was used up or the river was dirty in one place，man moved to another place.But this is no longer true.Man is now slowly polluting the whole world.
Air pollution is still the most serious.It’s bad for all living things in the world，but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.
Many countries are making rules to fight pollution. They stop people from burning coal in houses and factories from putting dirty smoke into the air. Pollution by SO2 is now the most dangerous kind of air pollution.It is caused by heavy traffic.We are sure that if there are fewer people driving，there will be less air pollution.
The earth is our home. We must take care of it.That means keeping the land，water and air clean.And we must take care of the rise in pollution at the same time.
1. What makes our world become much smaller?| A．Science development. | B．The rise in population. |
| C．The pollution on the earth. | D．The strong wind. |
| A．It was much easier than today. | B．It was much harder than today. |
| C．It was the same as today. | D．It was hard to describe. |
| A．Rubbish. | B．Water pollution. |
| C．Air pollution. | D．Noise pollution. |
| A．Making rules to fight pollution. | B．Drinking as little water as possible. |
| C．Stop buying new things. | D．Only walking to work. |
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【推荐1】Once considered an optional lifestyle choice, recycling has become a commonplace activity in most areas. One type of recycling, called downcycling, involves re-purposing a material into a new product of lesser quality.
Downcycling is also known as downstream recycling. It is most common in terms of industrial materials. These products lose their value as they are recycled, which limits their capacity for new use.
Giving products a new life is considered a good way to reuse materials and avoid waste. Once downcycled to their full capacity, however, these materials are eventually so degraded that they cannot be reused further. Since downcycled products are considered of lower quality than their original form, they cannot be used in remaking their original product.
Items available for downcycling often require additional chemicals, energy, and other treatments in order to transform them into something usable. Durable plastic products in particular require much additional treatment. Trash bins, tables, and chairs are also considered materials with a high energy cost to recycle.
When a product reaches a code seven, it is considered no longer recyclable.
| A．These recycled materials may often be put into new use. |
| B．It can include varying grades of plastic, paper products, and other materials. |
| C．Their recycled form is typically both weaker and cheaper than their original one. |
| D．They may not be used to contain food-grade items again upon being downcycled. |
| E．Products are provided with codes to determine their grades and whether or not they may be recycled. |
| F．A code will determine the type of the recycled materials and give an idea of how many times they can be recycled. |
| G．This usually occurs when a substance is blended with other substances, such as different types of plastic with various recycling codes. |
【推荐2】Every tropical (热带的) forest looks different, particularly in the eyes of an ecologist, and Peter Ellis has been lucky enough to visit a fair few. One in particular holds a special place in his heart: the rain forests of Gabon. He first visited as a Peace Corps volunteer. “It completely changed the way I think about conservation and our relationship with nature,” he says.
These days, Ellis is the global director of natural climate solutions science at the US-based conservation organization — The Nature Conservancy, where he’s presently investigating the role that logging (cutting down trees) can play in tropical forests. Logging for forest conservation may sound contradictory, and it often is. But logging in a tropical forest looks different to the practices we might expect to see. “We might imagine it as a wasteland of stumps (树桩) after a clear cut,” says Ellis. Instead, only a few trees are actually removed. A sustainably logged forest is the one that remains a breathing, rich, tropical rain forest full of trees and wildlife, thus helping keep a large part of the biodiversity while ensuring that more damaging industries don’t take its place. It can also provide a means of basic livelihood for the local people.
The two years that Ellis spent in the Gabon rain forests opened his eyes to a different method of land management. “The locals took me out into the forest and taught me the names, usages and spiritual significance of all the trees and other plants in the forest,” he says. “Science is about exact, designed experiments, but it’s also about asking the right questions. And the people who live in those places and protect the ecosystem are more likely to help us learn what the right questions to ask are.”
Tropical forests are essential to our planet’s future as they support high levels of biodiversity and act as crucial carbon sinks (碳储存器). “We need to honour, and protect them so that they can do their job to help save us all” says Ellis.
1. What does Peter Ellis think of his first visit to the rain forests of Gabon?| A．It was poorly arranged. | B．It made little difference to his life. |
| C．It brought him far-reaching influence. | D．It was physically challenging for him. |
| A．Logging balances the rain forests. |
| B．Logging means a complete clear-out. |
| C．Logging brings huge profits to the locals. |
| D．Logging encourages the local damaging industries. |
| A．Conduct many experiments. | B．Consult experienced local people. |
| C．Get involved in designing procedures. | D．Spread more knowledge about wildlife. |
| A．To stress the importance of biodiversity. |
| B．To introduce Ellis’s ideas about the future. |
| C．To provide further information about Ellis. |
| D．To call on people to preserve tropical rain forests. |
【推荐3】On May 29, 1953, New Zealander Edmund Hillary and Sherpa guide Tenzing Norgay became the first people to climb to the top of the world’s tallest mountain. The following day, as the weary expedition prepared for climbing down, leader John Hunt ordered his men to dump their extra equipment. The downward climb would be exhausting. The men could not have known that Mount Everest’s trash problem had begun.
Trash on Mount Everest ?
Yes! A lot of it. About 50 tons of garbage litters the slopes. Since 1953, thousands of people have climbed the world’s tallest mountain. Many dump their trash to lighten the load. None of it decomposes(分解) in the icy conditions.
A Trail of Corpses
At least 250 people have died climbing Mount Everest. Most bodies remain on the mountain, too heavy and large for other climbers to bring down. Frozen solid and still in their climbing clothes, the bodies serve as horrible trail markers. More deaths keep coming. Mount Everest’s deadliest day to date happened in April 2014, when 16 Nepali Sherpa guides died in an avalanche of ice and snow.
Garbage Crackdown
The government of Nepal now requires each expedition to pay a deposit of $4,000 before heading up the mountain. If climbers want their money back, they have to prove they brought down all of their own garbage, including their own bodily waste. That’s right--climbers have to carry their own poop. This year the government added another rule: In addition to their own trash, climbers must return with an extra 18 pounds of garbage.
Trash to Treasure
Some artists in Nepal are turning Everest’s trash into art. Fifteen artists created sculptures from a wide range of Mount Everest trash. By using the trash creatively, the artists hope to raise funds as well as awareness of the problem. Profits from art sold go back to an organization that has collected over 10 tons of garbage from the mountain.
1. Who began to litter trash there at first ?| A．16 Nepali Sherpa guides. | B．Edmund Hillary, Tenzing Norgay and John Hunt. |
| C．The government of Nepal. | D．Some artists in Nepal. |
| A．250 | B．more than 250 | C．less than 250 | D．16 |
| A．tiring. | B．frustrating. | C．interesting. | D．surprising. |
| A．both the corpses and garbage will increase. |
| B．both the corpses and garbage will decrease. |
| C．the corpses will increase while the garbage will decrease. |
| D．the corpses will decrease while the garbage will increase. |
【推荐1】At any moment, about half the world's population is wearing denim （牛仔布）. But few realize tiny bits of denim have been adding up to a surprising amount of pollution in water, as a new study shows.
Sam Athey, one of the study's authors, says, “Even though denim is made of a natural material — cotton — it contains chemicals. " Cotton fibers are treated with many types of chemicals, she notes. Some improve its durability and feel. Others give denim its distinctive blue color.
Athey and her team washed jeans and found that about 50,000 microfibers come off from each pair per wash. Not all of those fibers make their way into the environment. Wastewater treatment plants catch about 83 to 99 percent of them. Catching 99 percent may sound pretty good. But one percent of 50,000 is still 500 fibers per wash. And since every pair of jeans is washed again and again, it still adds up to lots of microfibers entering water environments.
Denim microfibers showed up in sediment （沉淀物）from the Great Lakes. More of these fibers polluted a series of shallow lakes in southern Ontario. They even turned up in sediment from the Arctic Ocean in northern Canada. The team found denim accounted for 12 to 23 percent of microfibers in the sediment. There were other microfibers too. But the team focused on denim because so many people wear jeans.
"Everyone wears jeans so they could be our largest input of microfibers into our streams and soils,“ Athey says. "An easy way to limit that is by washing our jeans less often.” Athey grew up thinking she should wash her jeans after every couple of wearings, but most jean companies recommend washing them no more than once a month “The solution is not that you shouldn't wear jeans," she says. "We need to buy fewer denim clothes and only wash them when they truly need it. ”
1. Why are chemicals used to deal with cotton according to the passage?| A．To lessen it harm. | B．To remove its blue color. |
| C．To make it into denim. | D．To prevent fibers from falling. |
| A．Chemicals | B．Microfibers. |
| C．Jeans. | D．Plants. |
| A．The wide uses of denim. |
| B．The types of water pollution. |
| C．The large water area of Canada. |
| D．The seriousness of denim pollution. |
| A．Avoid wearing jeans. | B．Wash jeans more often. |
| C．Reduce denim consumption. | D．Limit input in denim production. |
【推荐2】The amount of plastic pollution in the oceans is rapidly increasing. This is problematic, as at least 700 species of sea animals may mistake it for a tasty snack. While we know that some species seem to eat plastic because it looks like jellyfish or some other food source, less research has been carried out into what plastic smells like to marine animals.
But now, a study from the University of North Carolina has found that the coating of algae that naturally builds up on ocean plastics causes the rubbish to give off the scent of food.
The researchers took 15 loggerhead turtles, each around five months old, and placed them in a laboratory tank. They then piped in clean water, clean plastic, turtle food, and plastic that had been immersed in the marine environment for five weeks.
The turtles showed no reaction to the smell of clean water or clean plastic. But when they were exposed to the smell of ocean-soaked plastic 'or turtle food, they exhibited food-seeking behaviors like reaching their noses out of the water or showing increasing activities.
“This finding is the first demonstration that the smell of ocean plastics causes animals to eat them,” said Dr. Kenneth J Lohmann, who took part in the study. "It's common to find loggerhead turtles with their digestive systems fully or partially blocked because they've eaten plastic materials. There are also increasing reports of sea turtles that have become ill and stranded on the beach due to their ingestion of plastic."
According to the researchers, areas of the ocean with dense concentrations of plastic may trick turtles and other animals into thinking that there is an abundant food source. "Once these plastics are in the ocean, we don't have a good way to remove them or prevent them from smelling like food," said Lohmann.
1. Why is plastic pollution posing a threat to marine animals?| A．It may eat up all jellyfish. | B．It may mislead them as food. |
| C．It may kill them with its smell. | D．It may trap 700 species of sea animals. |
| A．Sea water | B．Clear water | C．Brand-new plastic | D．Sea-soaked plastic |
| A．Turtles should be trained to be more intelligent. |
| B．Plastics should be kept from getting into the ocean at all. |
| C．An abundant food source should be offered to sea animals. |
| D．Researchers should come up with a solution to the current problem. |
| A．Ways Found to Remove Plastics | B．Loggerhead Turtles Faced with Food Shortage |
| C．Ocean Plastics- Trick or Treat? | D．Plastic Pollution- Compromise or Control? |
【推荐3】The fight is on to get rid of air pollution in our cities. While the best solution in the long-term would be to ban fossil-fueled cars, that won’t help the millions who are dying in the meantime, and so some high-tech solutions are now on the cards.
London’s air pollution problem has been getting worse for years. In March 2016, ten London pigeons became famous. These pigeons took to the sky, wearing backpacks monitoring air pollution. Once in the air, the backpacks sent live air-quality updates to the smartphones of the Londoners below.
Another promising approach can be found in Beijing. A seven-metre-high “Smog Free Tower”, designed by a Dutch scientist, Daan Roosegaarde, opened in Beijing’s 751 D Park in September 2016. It is a huge, outdoor air purifier. Airborne particles (颗粒) are sucked into the tower and caught by a dust-removal plate. Finally, clean air is blown out of the other end. “Changing smog particles does not take much power.” Roosegaarde said.
As for what to do with the collected PM waste, he has currently set up a business making jewellery out of the waste. Prince Charles owns a set of “smog free” cufflinks (袖扣). If collected on at a big scale, Roosegaarde believes it could even be used as a building material.
Mexico City has an alternative solution. Looking to Nature to maximize the surface area of a building, Allison Dring, a Berlin-based architect, managed to catch light and wind from all sides. She is now making a building material by burning agricultural crop by-products in the absence of oxygen. “It means that you are actually taking carbon (碳) out of the sky, transforming it into a material, and then using it to build,” says Dring.
The fight against outdoor air pollution is really just starting. Even if none of the ideas take off, at least Prince Charles’ cufflinks, the special building surface and pigeons wearing back-packs will have brought the issue more to the public’s attention.
1. The underlined words “on the cards” in Para.1 probably mean ________.| A．hardly to achieve |
| B．widely questioned |
| C．very likely to happen |
| D．publicly welcomed |
| A．monitor air pollution |
| B．warn Londoners |
| C．update weather forecast |
| D．promote backpacks |
| A．It can catch light and wind. |
| B．Its power consumption is high. |
| C．PM waste from it can be reused. |
| D．It is the first air purifier in the world. |
| A．When can humans get rid of smog? |
| B．Why is technology used to fight smog? |
| C．How are the world’s cities fighting smog? |
| D．What makes smog a worldwide problem? |
【推荐1】Of all the components of a good night’s sleep, dreams seem to be least within our control. In dreams, a window opens into a world where logic is suspended and dead people speak. A century ago, Freud formulated his revolutionary theory that dreams were the disguised shadows of our unconscious desires and fears; by the late 1970s, neurologists had switched to thinking of them as just “mental noise”-the random byproducts of the neural repair work that goes on during sleep. Now researchers suspect that dreams are part of the mind’s emotional thermostat, regulating moods while the brain is “off line.” And one leading authority says that these intensely powerful mental events can be not only harnessed but actually brought under conscious control, to help us sleep and feel better. “It’s your dream,” says Rosalind Cartwright, chair of psychology at Chicago’s Medical Center, “if you don’t like it, change it.”
The link between dreams and emotions shows up among the patients in Cartwright’s clinic. Most people seem to have more bad dreams early in the night, progressing toward happier ones before awakening, suggesting that they are working through negative feelings generated during the day. Because our conscious mind is occupied with daily life we don’t always think about the emotional significance of the day’s events-until, it appears, we begin to dream.
And this process need not be left to the unconscious. Cartwright believes one can exercise conscious control over recurring bad dreams. As soon as you awaken, identify what is upsetting about the dream. Visualize how you would like it to end instead; the next time it occurs, try to wake up just enough to control its course. With much practice people can learn to, literally, do it in their sleep.
At the end of the day, there’s probably little reason to pay attention to our dreams at all unless they keep up from sleeping or “we wake up in panic,” Cartwright says. Terrorism, economic uncertainties and general feelings of insecurity have increased people’s anxiety. Those suffering from persistent nightmares should seek help from a therapist. For the rest of us, the brain has its ways of working through bad feelings. Sleep-or rather dream-on it and you’ll feel better in the morning.
1. By saying that “dreams are part of the mind’s emotional thermostat.” (Para. 1) the researchers mean that ________.| A．we can think logically in the dreams too |
| B．dreams can be brought under conscious control |
| C．dreams represent our unconscious desires and fears |
| D．dreams can help us keep our mood comparatively stable |
| A．Most bad dreams were followed by happier ones. |
| B．Divorced couples usually have more bad dreams. |
| C．One’s dreaming process is related to his emotion. |
| D．People having negative feelings dream more often. |
| A．learn to control his dreams |
| B．consult a doctor |
| C．sleep and dream on it |
| D．get rid of anxiety first |
【推荐2】Felix Ruppert and Alexander Badri-Sprowitz at the Max Planck Institute for Intelligent Systems in Stuttgart, Germany, designed a half-metre-high robot called Morti and gave it the capacity to teach itself how to walk, rather than to perform a pre-programmed step. The four-legged robot took only an hour to learn how to walk steadily, roughly the same amount of time as newborn horses need. And it’s the first time that a machine learning technique has been so successfully applied to four-legged robots.
Morti is controlled by an artificial intelligence (AI) algorithm (算法) that doesn’t have much information about the robot’s legs, such as the exact shape of each element. “The AI, working like the central nervous system, gives walking instructions for Morti to follow. It then adjusts them on the basis of readings from foot sentences that signal when the robot falls and loses contact with the ground. Initially, Morti falls down, but after about an hour the AI finds the best way to make it walk,” said RUppert.
Because the AI learns rather than calculating details of each leg’s movement in advance, which can use a lot of energy, Morti walks using 42 percent less energy than when it first starts at the end of an hour-long learning process. Morti’s process copies the way baby animals learn to move, as they also find the most efficient way to use their muscles by trying and initially tripping.
Dhireesha Kudithipudi at the University of Texas at San Antonio said that AI robots can often learn a specific task very well but can’t make readjustments when the environment changes and that Morti’s design, which relies on continually adjusting the robot’s movement, may perform better in that regard. Ruppert said he and the team are working on adding more sensors and range of motion to Morti in a gesture to make it a more animal-like robot.
1. What is special about Morti?| A．It is pre-programmed to walk. |
| B．It can learn to walk by itself. |
| C．It is the first four-legged robot. |
| D．It can help teach the newborns. |
| A．Its body structure. | B．Its design concept. |
| C．Its learning process. | D．Its working conditions. |
| A．By predicting Morti’s leg movement. |
| B．By training Morti’s muscles to the best. |
| C．By lowering Morti’s energy consumption. |
| D．By strengthening Morti’s bond with others. |
| A．Doubtful. | B．Cautious. | C．Subjective. | D．Favorable. |
【推荐3】A new product from Google may help people solve their sleep problems, but some privacy rights groups are concerned. Google showed off its newest Nest Hub home assistant device(设备)on Tuesday. In addition to recognizing your voice, showing pictures, videos, news and weather, it can also track your sleep.
The basic model costs about $100 and the sleep-tracking technology will be available for free for the rest of 2021. The sleep tracker makes Google’s product different from a similar home assistant from Amazon.
If you put the Nest Hub beside your bed, it can follow your sleep. That is because of a new computer chip called Soli, which can sense motion(运动). Some people may like the new technology because they would not have to wear another device to bed. Some companies make products people can only wear on their wrist to track their sleep.
Google says the new Nest Hub will create reports each week that show how long and how well a person sleeps. It will also show if they snore(打鼾), cough or wake up often. The company said it studies 15,000 people over the course of 110,000 nights to develop the technology.
For people who want to know more about their sleep, the device sounds like a good idea. But, people who pay attention to privacy are worried about what Google might do with the information it is gathering.
Google recently bought FitBit, a company that makes a health tracker people can wear on their wrist. Technology experts think Google may find a way for the Nest Hub to work with the FitBit. Google says the sleep tracker has a lot of privacy protections. For example, it will only work if the user turns it on. The company also said, “it will not use a person’s sleep information to try to sell advertising.”
1. What can be learned about the Nest Hub?| A．It is designed for users to wear on their wrist. |
| B．It cannot offer information about weather condition. |
| C．It is a sleep tracker developed by Amazon. |
| D．It can provide some data about users’ sleep. |
| A．Disturbing sleep. | B．Letting out personal privacy. |
| C．Lacking advanced technology. | D．Worsening personal physical problems. |
| A．The Nest Hub will be improved. | B．Google will give up its technology. |
| C．Sleep information will be made full use of. | D．Privacy protections will be strengthened. |
| A．Tech Companies Care About Privacy |
| B．Google’s Technology Makes Your Sleep Safer |
| C．A Device Has Been Made for Sleep Research |
| D．Google’s New Device May Track Your Sleep |
I was arranging to meet someone for dinner last week, and I said “I’ll pencil it in my diary”, and my friend said “You can ink it in”, meaning that it was a firm arrangement not a tentative one!
Many of these new verbs are linked to new technology. An obvious example is the word fax. We all got used to sending and receiving faxes, and then soon started talking about faxing something and promising we'd fax it immediately. Then along came email, and we were soon all emailing each other madly. How did we do without it? I can hardly imagine life without my daily emails.
Email reminds me, of course, of my computer and its software, which has produced another couple of new verbs. On my computer I can bookmark those pages from the World Wide Web that I think I'll want to look at again, thus saving all the effort of remembering their addresses and calling them up from scratch. I can do the same thing on my PC, but there I don't bookmark; I favorite—coming from “favorite pages”, so the verb comes from an adjective not a noun.
Now my children bought me a mobile phone, known simply as a mobile and I had to learn yet more new verbs. I can message someone, that is, I can leave a message for them on their phone. Or I can text them, write a few words suggesting when and where to meet, for example. How long will it be before I can mobile them, that is, phone them using my mobile? I haven’t heard that verb yet, but I’m sure I will soon. Perhaps I’ll start using it myself!
1. “I’ll pencil it in my diary” in the second paragraph probably means .
| A．it was a firm arrangement |
| B．he prefers a pencil to a pen |
| C．the arrangement should be written as a diary |
| D．it was an uncertain arrangement |
| A．favorited | B．messaged | C．emailed | D．texted |
| A．message | B．mobile | C．email | D．page |
| A．Technology and Language. |
| B．Development of the English language |
| C．New Technology and New words |
| D．New Verbs from Nouns |
【推荐2】Ever since it was created 30 years ago, The Simpsons, the longest running prime-time(黄金时段) TV show in the country, has become part of US life. So when TV critics Alan Sepinwall and Matt Zoller Seitz ranked the 100 greatest comedies and dramas broadcast in the US ,it came as no surprise that The Simpsons was their top choice.
This was the show that changed the very concept of cartoons in Western society. Before it appeared, cartoons were considered a way to learn and have fun, not serious adult entertainment. The Simpsons changed this. The genius of the show is that it has something to offer both adults and children.
It’s a hugely entertaining program that’s also full of satire(讽刺的) and clever humor.A remark by Chitra Ramaswamy in The Guardian gave a sense of the esteem(敬重) in which The Simpsons is held:“Nothing before or since has match its capacity to be at once so profoundly clever and so unbelievably stupid.”
The show’s creators make fun of the US government, social customs, and of course, the idea of family life. But unlike most classic US prime-time TV characters the Simpsons are a dys-functional(功能失调的) family.
Bart, the boy, is always in trouble---both at home and at school. That may be in part because of his paternal example. Homer Simpson, perhaps the most iconic(标志性的) character, is a beer-swilling, overweight slob（懒汉） who is normally found in front of the TV. And Marge, Homer’s wife and the mother of the family, spends most of her time cooking, cleaning or trying to fix the messes that Bart and Homer make.
The smartest member of the family is daughter Lisa, who does well in school but is no goody-goody(讨好卖乖的人)---Lisa never misses an opportunity to challenge authority. The youngest member of the family is baby Maggie, who will likely be as much of a handful as her brother and sister when she grows up.
But although the Simpsons are a problem family, viewers are always on their side. One of the reasons why the show has remained so popular all these years is that the characters are so lovely. Millions of us identify with them. They are a working class family struggling to make ends meet. They aren’t perfect, but then, who is? And after 30 years, this is still what strikes a chord （引起共鸣）with millions of viewers worldwide.
1. According to the article , The Simpsons___________.| A．is suitable for both adults and kids. |
| B．reminds people of their sad children. |
| C．is a program designed only for fun. |
| D．is difficult to understand for many people. |
| A．They all show great support to the government. |
| B．Bart and Lisa are the troublemakers of the family. |
| C．They are an ordinary family with many problems. |
| D．The children regard Homer as their role model. |
| A．they have the courage to challenge authority. |
| B．their lives and problems are similar to real people’s. |
| C．they teach viewers how to fix problems. |
| D．they are a happy and perfect family. |
| A．Reasons behind The Simpsons’ lasting popularity. |
| B．The most popular characters in The Simpsons. |
| C．Changes to The Simpsons over the years |
| D．What kind of stories The Simpsons tells. |
People who are near-sighted can only see things that are very close to their eyes, and everything else seems blurry(="unclear)." Many people who do a lot of work, such as writing, reading and sewing become near—sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading ,they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
1. When things far away seem indistinct(模糊不清) , one is probably____.
| A．near-sighted | B．far-sighted |
| C．astigmatic | D．suffering from cataracts |
| A．experience | B．imagine |
| C．feel pain | D．are affected with |
| A．seeing at night | B．seeing objects far away |
| C．looking over a wide area | D．judging distances |
| A．one eye bigger than the other |
| B．eyes that are not exactly the right shape |
| C．a difficulty that can be corrected by an operation |
| D．an eye difficulty that cannot be corrected by glasses |
