Are you ready to do your bit to stop global warming? On Saturday, March 29, you will have a chance-to tell Toronto and the entire world that you are devoted to doing your part.
You can do it by turning off your lights during Earth Hour, from 8 p.m. to 9 p.m. Started last year by the World Wildlife Fund in Sydney, Australia, Earth Hour this year is going international, with 17 cities signed up so far, including Toronto.
The challenge for us Torontonians will be to show we are as devoted to fighting global warming as Sydneysiders were last year. Of course, one hour of darkness isn't going to stop global warming. But the thinking behind Earth Hour is that it gets people personally involved(加入). Besides giving people a chance to show their concerns over climate change, the goal is to get them to start changing their wasteful habits. Did you know, for example, that your electronic devices(设备) that you think you've turned off are still drawing power if you leave them plugged in?
If you want to make a difference, sign up today and promise to turn off your lights when Earth Hour arrives on March 29. Persuade others to do their part. Start to think about changes that can be made in your home and your workplace that will cut down on waste and greenhouse gas.
【小题1】What can be the best title for the passage?

A kind of little cars may some day take the place of today’s ones. If everyone drives such cars in the future, there will be less pollution in the air. There will also be more space for parking cars in cities, and the streets will be less crowded. Three such cars can fit in the space now needed for one car of the usual size.
The little cars will cost much less to own and to drive. Driving will be safer, too, as these little cars can go only 65 kilometers an hour.
The cars of the future will be fine for getting around the city, but they will not be useful for long trips. Little cars will go 450 kilometers before needing to stop for more gasoline.
If big cars are still used along with the small ones, two sets of roads will be needed in the future. Some roads will be used for the gig, fast cars and other roads will be needed for the slower small ones.
【小题1】There is much pollution in the air today because ___________.

A．much smaller than	B．much the same as
C．three times as large as	D．a little larger than

A．there will be too many cars in the future

B．more and more people will get around a city

C．bit cars and little cars may be used along with each other

D．it looks more beautiful to have two sets of roads

Special Bridges Help Animals Cross the Road
— Reported by Sheila Carrick
Why did the chicken cross the road? To get to the other side.
Most people know this joke. But recently, some people have been much more worried about how the grizzly bear(灰熊)and mountain lion can cross the road.
"Millions of animals die each year on US roads," the Federal Highway Administration reports. In fact，only about 80 ocelots, an endangered wild cat, exist in the US today. The main reason? Road kill.
"Ecopassages (生态通道 ) " may help animals cross the road without being hit by cars. They are paths both over and under roads. "These ecopassages can be extremely useful, so that wildlife can avoid road accidents," said Jodi Hilty of the Wildlife Protection Society.
But do animals actually use the ecopassages? The answer is yes. Paul Beier of Northern Arizona University found foot marks left by mountain lions on an ecopassage that went under a highway. This showed that the lions used the passage.
Builders of ecopassages try to make them look like a natural part of an area by planting trees on and around them. Animals seem to be catching on. Animals as different as salamanders(火蜥蜴) and grizzly bears are using the bridges and underpasses.
The next time you visit a park or drive through an area with a lot of wildlife, look around. You might see an animal overpass!
【小题1】The writer uses the example of "ocelots " to show that ________.

Exposure to environmental tobacco smoke (ETS)-also called “second-hand smoke” and “passive smoking” contains over 4 000 chemicals, including over 50 known carcinogens (致癌物) and many poisonous things. No safe level of ETS exposure has been proved. Nor is there any expectation that further research will identify such a level.
Several recent reviews have confirmed the serious risks to health and life associated with passive smoking. Long time exposure to second-hand smoke has been proved as a cause of many of the same diseases caused by active smoking, including lung cancer, cardiovascular (心脏血管的) disease, and childhood disease.
Living with a smoker has been shown to increase the risk of coronary heart disease (冠心病) among non-smokers by 25-30% (a recent study indicates that this figure may actually be higher). There is also growing evidence that passive smoking is causally linked to stroke in non-smokers, although further research is needed to estimate the risk.
Second-hand smoke is especially dangerous for young children and infants, being associated with sudden infant death, pneumonia, bronchitis (支气管炎), asthma (哮喘) and respiratory symptoms as well as middle ear disease. ETS exposure in pregnant women can cause lower birth weight, foetal (胎儿的) death and preterm delivery.
Most of the adverse health outcomes brought about by ETS show that the risk increases steadily with increasing exposure. The level of individual risk is lower compared to active smoking. Nevertheless, the fact that large numbers of people are exposed results in a substantial burden of disease.
Action on smoke-free environments would not only protect people from the harm of ETS exposure but also contribute to the reduction of tobacco consumption in the whole population. The health effects of reduced passive and active smoking would include reduced illness and death from major disease types-in particular lung cancer, coronary heart disease, and stroke-and increased life expectancy.
51. Which of the following statements is true? _______
A. Although ETS contains many harmful things, it is not unsafe.
B. The fact that second-hand smoke is safe has been recently found.
C. It is expected that further research will be done to test the level of ETS.
D. By far the safe level of ETS has not been found and will not in the future.
52. Cardiovascular disease can be caused by _______.
A. long time passive smoking    B. accidental active smoking
B. occasional passive smoking   D. short term active smoking
53. According to the article, the statements about the risk of coronary heart disease are wrong EXCEPT that________
A. if you smoke, the risk of this disease will increase by 25-30%. 
B. the non-smokers exposed to smoke will increase the risk of this disease by 25-30%.
C. for the smokers, the risk of getting this disease is higher than that of the non-smokers.
D. the non-smokers exposed to smoke will be more easily to get this disease than the smokers.
54. What does the underlined word “delivery” mean? ________.
A. Transferring to another     B. Giving birth   C. Throwing away   D. Giving out
55. What’s the author’s main purpose in writing this passage? ______
A. To introduce what is ETS.
B. To tell the readers how to avoid ETS.
C. To call for the action against ETS.
D. To warn the readers against smoking.

Honeybees are disappearing for unknown reasons around the United States．Last winter, bees disappeared from 23 percent of American beekeeping businesses．Causes of the phenomenon, however, have remained a mystery．
Now, scientists from several universities and the United States Department of Agriculture say they have a possible explanation for the bee decline（数量下降）．It is a little known virus called Israeli acute--paralysis virus （IAPV）．The virus kills bees．Researchers in Israel first described it in 2004 , but until now, bee experts hadn’t paid much attention to it．
When trying to find out why the bees were disappearing, a research team at Columbia University studied bee colonies （群体）, some with and the others without decline．The research turned up large numbers of two types of fungi （真菌） once suspected of causing the bee decline．The research results, however, showed that the fungi were almost as common in colonies without a decline as they were in colonies with a decline．The researchers concluded that the two fungi probably weren’t the cause．
Studies of the presence of IAPV, however, showed more interesting information．In those studies, done by a team at Pennsylvania State University in University Park, the virus showed up in 83 percent of samples from colonies with symptoms （症状）．Only five percent of samples from symptomless colonies had it．
Scientists still don’t know whether IAPIV can single--handedly cause the bee decline．They believe that even if the virus is making colonies sick , it could have a partner in crime．It’s possible, for instance, that insects or chemicals in the environment weaken bees, making them more likely to catch IAPV．
Scientists are still trying to figure out how IAPV came to the United States．The United States currently allows bee products to be imported from Canada, Australia, and New Zealand．If it turns out that this trade is spreading disease, the rules might eventually change．
【小题1】According to the passage ，IAPV is a virus that ______．

Some fish form huge schools. Could fish set up schools and teach their children how to survive in the ocean? You may ask. No. Here the “schools” are not the places where you study. They are fish shoals (鱼群) that cover tens of kilometers. What causes hundreds of millions of fish to gather and move together is one of biology’s mysteries.
Darkness appears to be the first step to the creation of shoals, according to a study published in the March 27 journal Science. A team of researchers from the Massachusetts Institute of Technology (MIT) and five other institutions studied Atlantic herring (鲱鱼), which forms shoals on a fishing ground off Massachusetts. They used an underwater imaging technology and fish-finding sonar (声纳) to observe the herring over several days in autumn when they spawn (产卵).
They found that, as the sun set, fish in scattered (分散的) groups began swimming much closer to one another than they normally do. When the number of fish reached a certain point in an area, this set off a chain reaction of similar behavior that spread like a sound wave through the water.
The herring’s movement seemed to be started by sunset. The team didn’t record the breakup of these shoals, but a previous study suggested that as the sun rose, the shoals fell apart.
“When the light fades (逐渐消失), it’s safer for the fish to move away from the seabed,” says Nicholas Makris, a professor at MIT who led the research. “Once they have a certain number of other fish, they suddenly come together - forming a shoal covering tens of kilometers within tens of minutes.”
Herring form shoals to migrate during the autumn spawning season. Some shoals were 40 km across and 30 m from top to bottom. They formed in deep water and moved into more shallow waters to spawn.
Forming shoals helps protect them from predators (掠食者) by giving them simple strength in numbers. The ordered movement of the shoal means the fish can reach their spawning ground more quickly and more safely.
Scientists have never before gathered information on so many animals acting together. Understanding these herring shoals could lead to more ideas about what causes animals to move in schools, says Iain Couzin, a biologist at Princeton University, US.
1. Which school in the following expressions is used the same way as the underlined one in the first paragraph?
A. schools of thoughts       B. school a horse   C. a school of whales       D. a medical school
2. Which of the following statements is true?
A. There are more large shoals of herring at night than in the daytime.
B. The research on Atlantic herring was conducted independently by the Massachusetts Institute of Technology.
C. The larger the shoal of herring is, the more slowly it moves.
D. Scientists have found out the reason why fish gather and move together in huge shoals.
3. According to the research, herring tend to get together except ______.
A.when there are predators around  B. when they spawn C. when the sun sets  D. when the sun rises
4. What seems to be the main reason for herring to gather and move together?
A. To avoid the darkness.
B. To keep other kinds of fish out of their spawning ground.
C. To spawn in the shallow waters.
D. To make themselves feel safe.

Many do-it-yourself homeowners are interested in
trying out solar power to leam about the technology and
perhaps to provide energy for limited-use applications．
There are a variety of ways to find cheap solar panels
（板）, including buying used and building your own
with factory seconds．Both methods will save money
while forcing you to learn the ins-and-outs of a solar
power array （阵列）．  
We've all seen solar-powered street signs or PV
panels being used for various purposes at remote locations．
When those units become cracked or chipped and are considered "unsafe", companies are forced to replace them, generally to avoid responsibility issues．Because it's difficult to get rid of PV panels, many companies, if approached, are willing to give them away or to sell them for modest prices．Depending on the degree of damage present, expect to see performance degradation （降级） in the range of 10% to 60%．A multimeter （万用表） can be used to test the panel before buying．If the panel's free, take it anyway．It could still be useful in a home solar project．
A solar panel is really nothing but a box serving as a container for a large group of solar cells．Factory second solar cells are usually sold on eBay at a small part of their regular cost．The cells come in a variety of sizes．You will need to figure out how much power a single cell produces to determine how many will need to be wired together to form an array．
A simple search of the Internet will show numerous sites detailing home solar panel projects．Do-it-yourself lovers are generally quite generous in supply photographs of their work and description of what went wrong and right with the project．
Getting cheap solar panels with slight imperfections, either used or through sales of factory seconds, is a perfect solution for home-built renewable energy projects．The high number of solar lovers online provide a wealth of useful information．Only limited skills are required, plus an understanding of the basic wiring involved．All are well within the talents of almost any home handyman．Beyond the satisfaction of having completed the project, you'll come away with a functional solar panel that will be a source of power for use around the house or at remote locations．
Solar energy systems are quickly becoming more popular with homeowners as prices continue to decline．
72．The author writes the passage to introduce ____．
A．ways of finding cheap solar panels B．ways of saving energy
C．a way of making a solar panel     D．a home-built energy system
73．What does the phrase "factory seconds" in the passage refer to?
A．Second-hand factory products．  B．Cheap but perfect factory products
C．Faulty factory solar cells．        D．The second best factory solar cells
74．From Paragraph 5, we can learn about home-built energy projects that ____．
A．none of them are beyond home handymen
B．a lot of useful information is available on the Internet
C．a perfect solution is to get cheap and perfect solar panels
D．understanding electrical wiring is not necessarily needed
75．What is the author's attitude towards the future of solar energy systems?
A．Optimistic．  B．Pessimistic.      C．Indifferent．         D．Doubtful

The great Alaskan explorer John Muir once wrote that to have dinner with a glacier (冰川) on a sunny day is an excellent thing. It is better to sleep beside one, on an Antarctic island,  with just a sleepifig bag for warmth and the sky as your tent.
Our camp-out was in early January of this year on Danco Island, along the Antarctic Peninsula.  Midway through a 10-day Antarctic journey, conditions were near perfect.  We started our voyage from the Akademik Ioffe in Zodiacs,  landing on the wide beach with its fist-sized rocks.  At the height of the Antarctic summer, the shore was clear of snow, with plenty of room for the 40 adventurers to spend the night.
Danco Island was charted in 1898 by the Belgian explorer Adrien de Gerlache, who was the first to prove that you could overwinter in Antarctica and survive.  De Gerlache paved the way for Lt.  Robert Scott's first expedition in 1901.  De Gerlache mapped the archipelago (群岛).  He later named the island after his team member mile Danco,  a geophysicist who died that winter.  For one year in the mid-1950s, Danco was known as Base O by the British, who kept a scientific research station there, although all that. remains of it is a foundation and a pile of coal.
Our expedition was organized by Australian tour operator Peregrine Adventures. The weather was extraordinary -- sunny with daytime temperatures of about 1't2.  The camping was easy and accessible to all ages.  Sleeping under the stars in Antarctica,  in just a sleeping bag is pretty amazing.
1. Whom did Adrien de Gerlache have a direct effect on?
A. John Muir.           B. Lt. Robert Scott.
C. The tourists.          D. The author. 
2. What was Danco Island named after?
A. A place.             B. A glacier.
C. A person.           D. An ocean.
3. It can be inferred from the passage that        .
A. old people can't go 'camping in Antarctica
B. the author went to the Antarctica in winter
C. John Muir might have visited an Antarctic island
D. Lt. Robert Scott built a station in the Antarctic
4. What would be the best title for the passage?
A. Danco Island
B. An expedition to Antarctica
C. Explorers of Antarctica
D. Sleep under the stars in Antarctica

A.I. (人工智能) is just starting to become part of our lives, and books and movies have been talking about A.I. and robots for years. Mostly, in these books and movies,  the computers and robots turn out to be the enemies of  the human race. Here is a selection of some famous A.I.  movies..
2001: A Space Odyssey
In the movie 2001: A Space Odyssey, HAL is one of the first computers to talk like a human.  HAL is very frightening because it speaks in a calm voice as it goes on a killing spree (疯狂杀戮). When the astronauts attempt to hide in a smaller spaceship and switch off the microphones,  HAL uses a camera to read their lips and understand what the astronauts are saying.
The Terminator
In The Terminator, a computer thinks that its deadly enemies are human beings.  As a result,  the computer launches missiles (导弹) to start international wars and then builds killer robots to destroy the human race.
The Matr/x
In The Matrix,  a computer takes over the world and uses human beings for energy.   The computer keeps people alive by making them think that they are still living normal lives. A few brave rebels (叛逆者) decide to fight against the computer.
Star War movies
In the Star War movies,  computerised robots are used as servants and soldiers. R2-D2, a small cylindrical (圆柱形的) robot, and C-3PO, a tall talking robot, help some humans defeat the evil ruler,  Darth Vader,  in a dangerous battle between the forces of good and evil.
1, In the movie 2001: A Space Odyssey, the astronauts switch off the microphones to
A. prevent HAL hearing whom they axe calling
B. prevent HAL hearing what they are saying
C. force HAL to use a camera
D. force HAL to speak loudly
2. If you want to know how an intelligent computer uses human beings for energy, you should watch __
A. The Terminator.
B. 2001: A Space Odyssey'
C. Star War movies
D. The Matrix
3. R2-D2 and C-3PO stand for
A. the scientific forces
B. the natural forces
C. the good forces
D. the evil forces
4. What do the four movies have in common?
A. They all have the same ending.
B. They are about a similar theme.
C. They are all based on science fiction books.
D. They started heated discussions about A.I.

Yoga（瑜伽）is an ancient practice that helps create a sense of union in body, mind, and spirit. It brings us balance. After a long time of practice yoga, you no longer just practice it — you love it.
Yoga becomes part of your physical life. Your body grows stronger, more toned（有弹性的）, and more flexible as you move from one pose to another. I spent a week in Mexico at a yoga retreat, and it was the first vacation on which I lost weight. “Rather than building muscles, yoga builds muscle tone,” says Shakta Kaur Khalsa, author of KISS Guide to Yoga. “Because yoga helps maintain a balanced metabolism（新陈代谢）, and it also helps to control weight. Additionally, yoga stretches muscles lengthwise, causing fat around the cells disappear, thus losing weight.”
I do yoga poses throughout the day. After hours at my computer, I stretch my stiff shoulders and arms. When I need an increase in energy, I do energizing poses. When I am feeling exhausted at the end of the day, I do restorative（恢复体力的）poses.
Yoga becomes part of your mental life. Yoga teaches you to focus on breathing while you hold the poses. This attention to breath is calming; it dissolves（使消除）stress and anxiety. I use yogic breathing on the tennis court, in the dentist’s chair, and when I’m stuck in traffic.
You should always leave a yoga practice feeling energized, but not tired. If you feel tired after yoga, it means you spent the time “fighting” yourself, trying to force yourself into poses. In yoga, you “surrender” to the poses by letting go of the tension.
64. What will be talked about if this passage continues?
A. Yoga is becoming part of your spiritual life.
B. Yoga is becoming popular all over the world.
C. The disadvantages of yoga.
D. Encouraging people to do yoga.
65. According to the second paragraph, yoga can help people ___.
A. grow tall             B. lose weight C. be flexible in thinking     D. make friends
66. Why does a person feel tired after yoga?
A. Because when practicing yoga, people will consume a lot of energy.
B. Because he or she surrenders to the poses by letting go of the tension.
C. Because yoga doesn’t benefit all the people.
D. Because he or she doesn’t do yoga poses naturally.
67. What would be the best title for this passage?
A. What’s yoga?                                         B. How do I do yoga poses?
C. The benefits of yoga.                           C. The varieties of yoga.