London has always been known for its "black fogs". In the winter of 1952, a milky white fog rolled into the city. As the smoke poured into the air, it was so hard to see that people had to walk in front of the buses to guide them. In this way, the most serious air pollution disaster in history began. When it was over, more than 4,000 people had been killed by the thick black smog.
New York City has had several London-type smogs since 1950. Each time, 100 to 400 deaths were caused by the smog. Although these smogs were not as deadly as London's, New York City has the worst air pollution problem in the United States.
In all the killer smogs, factories and homes poured smoke and fumes into the air from the furnaces. The chemical fumes combined with the water droplets in the fog to form harmful substances. These substances caused the illness of those who breathed the polluted air.
Usually, such harmful fumes rise into the upper air and are blown away by the wind. But sometimes there is an unusual weather condition called a temperature inversion. A layer of cold air remains near the ground as smoke and fumes pour into it. This is covered by an upper layer of warm air that acts like a lid. It prevents the polluted cooler air from rising. The harmful fumes pile up and make people ill. The smog may be so thick that airports are closed and chains of collisions occur on the highways.
Another type of smog occurs in Los Angeles. Here the weather may be clear and sunny. But stinging eyes and dry coughs show that harmful chemicals fill the air. The smog is due to invisible gases, mostly from automobile exhaust. Because these chemicals are changed by the sun high up in the air, it is called photochemical smog. It contains automobile exhaust fumes and nitrogen oxides changed by the sun's rays. Added to these are sulfur dioxide and other fumes from factories and oil refineries. Photochemical smog is found in many large cities all over the world.
Killer smogs don't happen very often, fortunately. But in Beijing, a combination of automobile exhaust fumes, home furnace smoke, and factory waste gases pours into the air. This may also happen in the suburbs, or out in the country, where large factories have been built. A number of harmful substances have been found in the air there. When these substances are breathed in day after day, the health of the population is affected.Why do people call this phenomenon "black fog"?
| A．It is black and dirty. |
| B．It can affect the health. |
| C．It can kill people. |
| D．It is too thick for people to see something. |
What can reduce the air pollution according to the passage'?
| A．Water. | B．Wind. | C．The sun. | D．Cold air. |
When photochemical smog happens in the city, .
| A．many people will be killed |
| B．black smoke may pour into the air |
| C．the weather may be fine |
| D．people have to walk to work |
From the passage we know that the most serious black smog disaster took place in .
| A．London | B．New York | C．Los Angeles | D．Beijing |
Going green seems to be a fad(时尚) for a lot of people these days.Whether that is good or bad,we can’t really say, but for the two of us, going green is not a fad but a life style.
On April 22,2011,we decided to be green every single day for an entire year. This meant doing 365 different things, and it also meant challenging ourselves to go green beyond the easy things. Rather than recycle and reduce our energy, we had to think of 365 diffenent things to do and this was no easy task.
With the idea of going green every single day a year,Our Greean Year started. My wife and I decided to educate people about how they could go green in their lives and hoped we could show people all green things that could be done to help the environment. We wanted to push the message that every little bit helps.
Over the course of Our Green Year, we completely changed our lifestyles. We now shop at organic(有机的) stores. We consume less meat,choosing green food. We have greatly reduced our buying we don’t need. We have given away half of what we owned through websites.Our home is kept clean by vinegar and lemon juice, with no chemical cleaners. We make our own butter, enjoying the smell of home-made fresh bread. In our home office anyone caught doing something ungreen might be punished.
Our minds have been changed by Our Green Year. We are grateful for the chance to have been able to go green and educate others. We believe that we do have the power to change things and help our planets.What might be the best title for the passage?
| A．Going green |
| B．Protecting the planet |
| C．Keeping Open-Minded |
| D．Celebrating Our Green Year |
It was difficult for the couple to live a green life for the whole year because_______.
| A．they were expected to follow the green fad |
| B．they didn’t know how to educate other people |
| C．they were unwilling to reduce their energy |
| D．they needed to perform unusual green tasks |
What did the couple do over the course of Our Green Year?
| A．They tried to get out of their ungreen habits. |
| B．They ignored others’ ungreen behaviour. |
| C．They chose better chemical cleaners. |
| D．they sold their home-made food |
What can we infer from the last paragraph?
| A．The government will give support to the green roject. |
| B．The couple may continue ther project in the future. |
| C．Some people disagree with the couple’s green ideas. |
| D．Our Green Year is becoming a national campaign. |
China is a land of bicycles.At least it was back in 1992 when I travelled the country.Back then everyone seemed to be riding a bicycle.Millions of them,all black.Cars were rare.Yet since my arrival in Beijing last year,I've found the opposite is true.There were millions of cars.However,people still use their bicycles to get around.For many,it's the easiest and cheappiest way to travel today. Bicycles also come in different colours---silver,green,red,blue,yellow,whatever you want.
It's fun watching people biking. They rush quickly through crossroads,move skillfully through traffic,and ride even on sidewalks(人行道). Bicycles allow people the freedom to move about that cars just can't provide.
Eager to be part of this aspect of Chinese culture, I decided to buy a bicycle. Great weather accompanied my great buy. I immediately jumped up on my bicycle seat and started to ride.
My first ride home was orderly(守秩序的).To be safe,I stayed with a "pack"of bikers while cars on the streets came running swiftly out of nowhere at times. I didn't want to get hit.So I took the ride carefully.
Crossing the streets was the biggest problem. It was a lot like crossing a major highway back in the United States. The streets here were wide,so crossing took time,skill and a little bit of luck.
I finally made it home. The feeling on the bicycle was amazing. The air hitting my face and going through my air was wonderful. I was sitting on top of the world as I passed by places and people.Biking made me feel alive.
| 1． |
According to the suthour,why are bicycles still popular in China today?
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| 2． |
The authour decided to buy a bicycle because he intened.
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| 3． |
How did the suthour feel about his street crossing?
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| 4． |
Which of the following best describes the authour's biking experience?
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While Jennifer was at home taking an online exam for her business law class, a monitor（监控器）a few hundred miles away was watching her every move.
Using a web camera equipped in Jennifer’s Los Angeles apartment, the monitor in Phoenix tracked how frequently her eyes moved from the computer screen and listened for the secret sounds of a possible helper in the room. Her Internet access was locked - remotely - to prevent Internet searches , and her typing style was analyzed to make sure she was who she said she was: Did she enter her student number at the same speed as she had in the past? Or was she slowing down?
In the battle against cheating, this is the cutting edge and a key to encourage honesty in the booming field of online education. The technology gives trust to the entire system, to the institution and to online education in general. Only with solid measures against cheating, experts say, can Internet universities show that their exams and diplomas are valid - that students haven’t just searched the Internet to get the right answers.
Although online classes have existed for more than a decade, the concern over cheating has become sharper in the last year with the growth of "open online courses." Private colleges, public universities and corporations are jumping into the online education field, spending millions of dollars to attract potential students, while also taking steps to help guarantee honesty at a distance.
Aside from the web cameras, a number of other high-tech methods are becoming increasingly popular. Among them are programs that check students’ identities using personal information, such as the telephone number they once used.
Other programs can produce unique exam by drawing on a large list of questions and can recognize possible cheaters by analyzing whether difficult test question are answered at the same speed as easy ones. As in many university classes, term papers are scanned against some large Internet data banks for cheating.Why was Jennifer watched in an online exam?
| A．To correct her typing mistakes. |
| B．To find her secrets in the room. |
| C．To prevent her from slowing down. |
| D．To keep her from dishonest behaviors. |
The underlined expression cutting edge in Paragraph 3 is closest in meaning to______.
| A．advanced technique | B．sharpening tool |
| C．effective rule | D．dividing line |
For Internet universities, exams and diplomas will be valid if _____.
| A．they can attract potential students | B．they can defeat academic cheating |
| C．they offer students online help | D．they offer many online courses |
Some programs can find out possible cheaters by _____.
| A．checking the question answering speed |
| B．producing a large number of question |
| C．scanning the Internet test question |
| D．giving difficult test question |
Which of the following is the best title of this passage?
| A．The Advantages of Online Exams |
| B．The High-tech Methods in Online Courses |
| C．The Fight against Cheating in Online Education |
| D．The War against the Booming of Online Education |
One day, when I was working as a psychologist in England，an adolescent boy showed up in my office. It was David. He kept walking up and down restlessly, his face pale, and his hands shaking slightly. His head teacher had referred him to me. "This boy has lost his family," he wrote. "He is understandably very sad and refuses to talk to others, and I'm very worried about him. Can you help?"
I looked at David and showed him to a chair. How could I help him? There are problems psychology doesn't have the answer to, and which no words can describe. Sometimes the best thing one can do is to listen openly and sympathetically
The first two times we met, David didn't say a word. He sat there, only looking up to look at the children's drawings on the wall behind me. I suggested we play a game of chess. He nodded. After that he played chess with me every Wednesday afternoon-in complete silence and without looking at me. It's not easy to cheat in chess, but I admit I made sure David won once or twice.
Usually, he arrived earlier than agreed, took the chess board and pieces from the shelf and began setting them up before I even got a chance to sit down. It seemed as if he enjoyed my company. But why did he never look at me?
"Perhaps he simply needs someone to share his pain with," I thought. "Perhaps he senses that I respect his suffering." Some months later, when we were playing chess, he looked up at me suddenly.
"It's your turn," he said.
After that day, David started talking. He got friends in school and joined a bicycle club. He wrote to me a few times about his biking with some friends, and about his plan to get into university. Now he had really started to live his own life.
Maybe I gave David something. But I also learned that one-without any words-can reach out to another person. All it takes is a hug, a shoulder to cry on, a friendly touch, and an ear that listens.
| 1． |
When he first met the author, David.
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| 2． |
As a psychologist, the author.
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| 3． |
David enjoyed being with the author because he.
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| 4． |
What can be inferred about David?
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| 5． |
What made David change?
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Some people think that success is only for those with talent or those who grow up in the right family, and others believe that success mostly comes down to luck. I’m not going to say luck,talent,and circumstances don’t come into play because they do. Some people are born into the right family while others are born with great intelligence, and that’s just the reality of how life is.
However,to succeed in life,one first needs to set a goal and then gradually make it more practical.And,in addition to that,in order to get really good at something,one needs to spend at least 10,000 hours studying and practicing.To become great at certain things,it’ll require even more time,time that most people won’t put in.
This is a big reason why many successful people advise you to do something you love. If you don’t enjoy what you do ,it is going to feel like unbearable pain and will likely make you quit well before you ever become good at it.
When you see people exhibiting some great skills or having achieved great success,you know that they have put in a huge part of their life to get there at a huge cost.It’s sometimes easy to think they got lucky or they were born with some rare talent,but thinking that way does you no good,and there’s a huge chance that you’re wrong anyway.
Whatever you do,if you want to become great at it, you need to work day in and day out,almost to the point of addiction,and over a long period of time.If you’re not willing to put in the time and work,don’t expect to receive any rewards.Consistent, hard work won’t guarantee you the level of success you may want, but it will guarantee that you will become really good at whatever it is you put all that work into.Paragraph 1 mainly talks about ________.
| A．the reasons for success | B．the meaning of success |
| C．the standards of success | D．the importance of success |
In Paragraph 2,the underlined word that refers to ______.
| A．being good at something | B．setting a practical goal |
| C．putting in more time | D．succeeding in life |
Successful people suggest doing what one loves because ______.
| A．work makes one feel pain | B．one tends to enjoy his work |
| C．one gives up his work easily | D．it takes a lot of time to succeed |
What can we infer from Paragraph 4?
| A．Successful people like to show their great skills. |
| B．People sometimes succeed without luck or talent. |
| C．People need to achieve success at the cost of life. |
| D．It helps to think that luck or talent leads to success. |
What is the main theme of the passage?
| A．Having a goal is vital to success. |
| B．Being good is different from being great. |
| C．One cannot succeed without time and practice. |
| D．Luck,talent and family help to achieve success. |
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