[1] As adolescents(青少年), having a meaningful effect on the world can seem like an impossible task for the simple fact of being kids.  Changing the world does not only mean finding a cure for cancer, eliminating poverty, or finding the origin of humanity, but recycling a piece of paper as well. Going Green is a practical way that adolescents can have a real, meaningful influence in the world.  There are numerous options of how individuals can change their lifestyles to be more eco-conscious(有生態(tài)環(huán)保意識的). What follows are three simple ways young adolescents can go green and change the world.
1. Recycle
[2] According to a Wire & Twine online article, 63 million newspapers come out every day and of those 44 million are thrown away; recycling the Sunday newspaper alone we could save half a million trees a week.
[3] The age of technology constantly creates new phones, iPods, or new computers.  Many will stand in line for hours if not days to get their hands on the new piece of technology, but what happens with the old ones once they are replaced?  Nothing, according to Earth911 about 75% of the old devices sit in the back of a drawer collecting dust.  By taking them to the local stores that collect them, they go to poor people which in turn removes them from landfills(垃圾填埋場) where the phones explode because of the lead and lithium-ion(鋰離子) the phones contain.
2. Go vegetarian one day a week
[4] Instead of breaking down the pros and cons(利弊) of the vegetarian lifestyle into a long boring paragraph, here are some astonishing facts on going vegetarian for only one day.  According to Noam Mohr, a physicist at the New York University, the United States would save 100 billion gallons of water which is enough to supply all homes in New England for about 4 months.
[5] The United States would save 70 million gallons of gas which is enough to fuel all the cars of Canada and Mexico combined and still have some to spare. The United States could prevent 3 million tons of soil erosion(侵蝕), 4.5 million tons of animal wastes, and about 7 tons of ammonia emissions (氨排放). The Environmental Defense concludes with the most interesting fact: if the entire population gives up one meal of chicken, the amount of carbon dioxide accumulated would be the same amount if more than half a million cars were taken off U.S. roads.
3. 第6題
[6] Most drink bottled water because of the common view that bottled water is healthier than regular tap water; actually, 25% of bottled water comes from regular tap water and all that is done extra is it going through a filter(過濾器).  Tap water has higher regulations from the FDA (Food and Drug Administration美國食品藥品管理局) than bottled water does.  Companies do not need to list where they got the water from, how they purify the water, or what chemicals their plastic water bottles contain.  Plastic bottles do not get recycled 90% of the time which results in 1.5 million tons of plastic in landfills which take thousands of years to rot.  Not only are you drinking the same water as that in your house but also paying extra.  The average 24-pack of bottled water cost $3.97 at the local Wal-Mart and a reusable water bottle cost between $4.99-$7.99; just imagine how much money could be saved if reusable water bottles replaced plastic water bottles.
[7] Changing the world for a positive has to start somewhere and while it may be hard and at times it may seem as if the small changes that are being done are not affecting the world, keep in mind what Margaret Mead once said, “Never doubt that a small group of thoughtful citizens can change the world; indeed, it’s the only thing that ever has.”
【小題1】What’s the whole passage mainly talked about?

A．Ways to protect environment.	B．Ways to become powerful.
C．The importance of recycling.	D．The importance of saving water.

【小題2】What’s the meaning of the underlined sentence in Paragraph 1?

A．Changing the world involves many questions.

B．It’s not easy to change the world.

C．Changing the world is not so difficult.

D．We can actually do everything.

【小題3】How much of the daily newspapers are thrown away according to Paragraph 2?

A．About 44%.

B．About 63%.

C．About 70%.

D．About 75%.

【小題4】 In the article, the writer _____ to tell us the benefits of the vegetarian lifestyle.

A．does a lot of reasoning	B．uses many facts
C．borrows VIPs’ phrases	D．puts forward new ideas

【小題5】What’s the benefits of giving up just one day of eating meat according to Paragraph 4 and 5?

A．Much water and gas would be saved.	B．Much land would be spared.
C．More animals would survive.	D．More cars would be on the roads.

【小題6】Which of the following can be the subtitle(小標題) of Paragraph 6?

A．Drink healthy water	B．Produce bottled water
C．Give up bottled water	D．Reuse tap water

【小題7】Why do many people choose to drink bottled water according to Paragraph 6?

A．They think it’s cheaper.

B．They think it’s healthier.

C．They think it’s more fashionable.

D．They think it’s environmental friendly.

【小題8】What’s the main idea of the last paragraph?

A．We should find a proper time to start action

B．Small changes will make big differences.

C．Personal efforts will not affect the world.

D．A small group of people matters.

Electrical devices（儀器）could soon use power make by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking . British scientist Max Donelan and other scientists in Canada and the United States developed the device.
The device connects to a person’s knee. As the person walks, the device captures energy each time the person slows down. To do this , the device helps with the slowing sown movement of the leg.  The movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
There are several possible uses for the device . Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers（起博器）. It could even be used to assist in the movement of robotic arms and legs.
The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy. But the researchers hope to make a lighter, less costly version. An improved version should be ready in one year.
The developers hope the device will one day help developing countries. Nearly twenty five percent of people around the world live without electric power.
A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania. He created a bag carried on a person’s back that also produces power from walking. The knee device does not produce as much electricity as the bag . But the bag requires the walker to carry a load of twenty to thirty kilograms.
【小題1】The second paragraph mainly talks about       .

A．who developed the device

B．how the device works

C．several possible uses for the devices

D．how much electricity the device can produce

【小題2】What is the disadvantage of the experimental version of the device?

A．It is too heavy for the walker to bear

B．It is too complex for people to use

C．It is too expensive for most people to afford

D．It will slow down one’s walking speed.

【小題3】Compared with the device designed by Larry Rome ,this new device       .

A．produces power without adding more loads to the walker

B．can produce more power in a much shorter time

C．needs to be equipped with a battery

D．can help the walker walk faster

【小題4】From the passage, we can learn that the electrical device can       .

A．help housewives operate the washing machine

B．make it much easier for us to go online

C．produce more electricity than that invented by Larry Rome

D．be applied to operate heart pacemakers

【小題5】What would be the best title for the passage?

A．First device powered by walking will soon be on the market

B．Advanced technology brings in a new way to operate heart pacemakers

C．Device gives new meaning to the idea of power walking

D．Human energy will become a main source of electricity

While nature lovers across the world wish all humans to realize the significance of their natural surroundings , many Australians are turning caring for the environment into a way of life.
Julie Astonis , an Australian housewife in Brisbane is one such example. Even though autumn is approaching Australia’s Brisbane in April, one can still watch colorful blooming （盛開的）flowers in Julie’s little garden. As she tells that in her community, “Each of us has a beautiful yard, The whole community, from children to elderly people, takes care of the environment as if they are taking care of their own garden.”
“Gardening is the most popular club in our community,” she says, “A lot of retired people don’t just regularly organize gardening lectures, but also personally visit families in the community to provide gardening training , So you can see that flowers continue to bloom in our gardens throughout the year.”
Talking about her people’s sense of care for the environment, Julie says when people in the community take along their dog, they always carry a garbage bag to deal with the dog’s waste . “In our community ,you will never experience the embarrassment of stepping on the dirty waste while you are walking on the grass,” says Julie with a smile. “Taking care of the dog’s waste can also help to develop children’s sense of responsibility!”
As to protecting water resources , the Australian government has made strict rules for families. Julie says, “We certainly would not use tap water to water the flowers!”She says almost every family in her community has a huge tank used to store rainwater, which is later used as the resource of all outdoor water use . They also connect the water tank with their toilets.
【小題1】From the first three paragraphs we learn that       .

A．gardening is popular in most part of Australia

B．April is a great time for people to enjoy flowers

C．it’s not easy to keep a garden without proper training

D．Julie’s community has a deep sense of caring for nature

【小題2】What do we know about Julie from this passage?

A．She takes pride in her community

B．She once stepped on a dog’s waste

C．She is quite in favor of raising a dog

D．She finds it embarrassing to walk on the grass

【小題3】From what Julie says in the last paragraph, we know       .

A．rainwater is not the best resource

B．her community owns a public tank

C．her community makes full use of resources

D．it is not necessary to water flowers very often

【小題4】How many examples are given to show the caring for the environment in Australia?

A．Two

B．Three

C．Four

D．Five

【小題5】What would be the best title for the passage?

A．Love nature, the Australian way	B．How Australians save resources
C．How Australians lead their life	D．Protect nature, a must of life

One of my China Dialogue colleagues in Beijing recently bought a Philips energy-saving light bulb to replace a standard one．He was happy with his choice．It may have cost 30 yuan （just under US$4．50） - ten times the price of a filament （燈絲） bulb - but he wanted to save energy as part of his low-carbon lifestyle．And according to the shopkeeper, he would save, in the long run, much more than the 30 yuan he was spending．
Yet only one month later, his expensive light bulb blew up, before he had saved even a small part of the purchase price．Will he stick to his high-cost, low-carbon lifestyle?
China's environmental organizations have started to advocate low-carbon lifestyles and the decrease of carbon footprints to help fight against climate change．But they have overlooked one fact: in China, low-carbon living comes at a high cost．It means buying energy-saving bulbs and appliances, and environmentally friendly building materials and daily goods．Cost can no longer be the only standard for purchases．An energy-saving and environmentally friendly product is more expensive than a standard alternative - whether it's a simple light bulb or the house it shines．For average consumers, even buying an ordinary bulb is a huge burden．How can we persuade ordinary people to choose an energy-saving residence? This is not a trend they can afford to follow; perhaps this fashion is only for the rich．
Most consumers today do not cause huge carbon dioxide （CO₂） emissions．Their responsibility lies not in choosing a low-carbon lifestyle today, but in avoiding a high-carbon life in the future．The principle of "common but differentiated responsibility" - a basis of sustainable development - can be applied here as well．
In China, low-carbon living still is resisted by a lack of social infrastructure（基礎設施）. Even if your salary allows you to make that choice, nobody is there to help you accomplish it．
Consider energy-saving homes. You need to find out whether or not the developer has used natural materials wherever possible; how effective the insulation（絕緣物、隔熱物） is; and what the green credentials of installed equipment are．You can read up a little, but you'll still be lucky to avoid being puzzled by the developers' marketing．Many so-called energy-saving buildings are nothing of the sort, and some are even more energy-hungry than the average home - as Li Taige warned in his article "Energy-efficient buildings? Not always", on China Dialogue last August．
【小題1】What may probably be the best title of this passage?

A．To purchase a cheap bulb - your wise alternative．

B．To choose an energy-saving residence - a must of your life

C．To learn a low-carbon lifestyle - each citizen's responsibility

D．To learn a low-carbon lifestyle - a promising but difficult purpose

【小題2】Why does the writer say this fashion is only for the rich in the fourth paragraph?

A．Because the cost is a very important standard for purchases.

B．Because buying an ordinary bulb is very expensive.

C．Because energy-saving products are more expensive than the common alternatives.

D．Because rich people like to follow this trend.

【小題3】What does the writer think of energy-saving homes?

A．Most of them are environmentally friendly.

B．They are musts of low-carbon lifestyle of Chinese.

C．They are huge burdens for Chinese people.

D．Many of them are more in name than in reality.

【小題4】We can infer from the passage that ____．

A．Using energy-saving bulbs and appliances is a fashion．

B．It's easy for most Chinese to try to learn a low-carbon lifestyle．

C．All citizens in China don’t have the same responsibility in living a low-carbon lifestyle．

D．Most Chinese families cannot afford to purchase an energy-saving residence.

【小題5】What is the writer's attitude towards the low-carbon lifestyle?

A．informative and entertaining	B．supportive but cautious
C．negative but wise	D．positive and active

Many animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food. You may like it because it smells good or because it tastes good. You may dislike some types of food because they do not look, smell or taste very nice. Different animals use different sense, to find and choose their food. A few animals depend on only one of their senses. while most animals use more than one sense.
Although there are many different types of food, some animals spend their lives eating only one type. The giant panda (大熊貓) eats only one particular type of bamboo (竹子). Other animals eat only one type of food even when given the choice. A kind of white butterfly (蝴蝶) will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet (多樣化飲食). The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.
Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad for the health, Choosing the right food, therefore, has become an area of study in modern life.
【小題1】We can infer from the text that humans and animals - —.      

A．depend on one sense in choosing food

B．are not satisfied with their food

C．eat entirely different food

D．choose food in similar ways

【小題2】Which of the following eats only one type of food?

A．The small bird.

B．The bear.

C．The fox.

D．The white butterfly.

【小題3】Certain animals change their choice of food when ________

A．the food color changes

B．the season changes

C．they move to different places

D．they are attracted by different smells

Of all the websites, one that has attracted attention recently is myspace.com. Most of this attention has come from the media and tells every reason why the website should be shut down. The danger of internet predators(竊掠者) is indeed a tough reality, but shutting down the site is not the answer. If myspace.com were shut down, another site would quickly take its place. Therefore, the right way is to teach teens how to use the site safely and educate them about who may be predators and how to avoid them.
The key to staying safe on the Internet is to make sure that your profile(個人資料) is secure. The simplest way is to change the privacy setting on your profile to “private”, which protects your information so that only the people on your friend list can view it. Although this is effective, it is not perfect. Predators can find ways to view your profile if they really want to, whether through hacking(非法侵入) in or figuring out their way onto your friend list. Thus, you should never post too much personal information. Some people actually post their home and school addresses, date of birth, and other personal information, often letting predators know exactly where they will be and when. The safest information is your first name and province. Anything more is basically inviting a predator into your life.
Another big problem is photos. I suggest completely skipping photos and never posting a photo of a friend online without asking permission.
Most importantly, never, under any circumstances, agree to a real-life meeting with anyone you meet online. No matter how well you think you know this person, there are no guarantees that they have told the truth. But you could feel free to chat with people you meet on the site, but just remember that not everyone is who they say they are. Hopefully, the next time you edit your profile, you’ll be more informed about the dangers of Internet predators and take the steps to defend yourself.
Lastly, do not send money to anyone you meet online. A common scam among Internet criminals is to request to pay for “expensive Internet charges” or “unreasonable Internet cafe fees”. While it is indeed true that many countries in Eastern Europe, Asia, Africa and South America do not yet have Internet service readily available in all cities and towns, a sincere friend from one of these countries will be more than happy to pay their own Internet charges. Never, under any circumstances, should you send money to a stranger from another country(or within your own country for that matter) who claims monetary assistance is required to continue their contact with you.
【小題1】Kids can avoid web predators successfully by________.

A．attracting more public attention

B．shutting down the “myspace.com”

C．learning different ways to try other sites

D．recognizing and getting away from them

【小題2】68. We can learn from the text that________.

A．everybody you meet online isn’t honest and reliable

B．it is not acceptable to post a photo of a friend online

C．it is not safe to chat with grown-ups on the website

D．only you and your friends can view your personal profile

【小題3】What does the underlined word “scam” in the last paragraph mean?

A．A thing that you can have two choices.

B．An unpleasant task that tests one’s ability.

C．A possibility of something happening.

D．An illegal plan for making money.

【小題4】What could be the best title of this passage?

A．Personal Safety.	B．Web Safety for Teens.
C．Web Hackers in the past.	D．Predators’ Tricks.

It is often said that man has become the enemy of our planet. This is no exaggeration(夸張), for reports show that man’s greed has done much to destroy the earth. Man, in his greedy desire for financial growth, has polluted the air, land and water, and has robbed our valuable natural resources. Man’s industrial plants pour out poisonous waste that pollutes the sea and puts life in the sea under the threat of dying out; at the same time, they release alarming amounts of carbon dioxide, chlorofluorocarbons (CFCs) and other pollutants. Small wonder that the air now is much warmer and more impure than ever before.
Of course, this is not just because of man’s greed—it is man’s pressing need as well. For instance, in developing countries, huge financial foreign debts have forced governments to approve the cutting of forests for agriculture or ranching. As a result, forests are cut down just to meet man’s immediate needs.
Perhaps unknowingly，man has changed the make-up of the earth's atmosphere. Scientific studies have shown that CFCs used in refrigerators and industrial cleaners are fast destroying the ozone layer—a protective layer in the atmosphere that protects us against the harmful effects of the sun’s ultraviolet (紫外線)rays. In fact, documented reports have shown a terrible fact that there are “holes” in the ozone layer over the Antarctic. And they appear to be expanding.
Faced with these environmental problems, world leaders have shown deep concern. The UN Environmental Programme (UNEP) has arranged international agreements like the Vienna convention of 1985 and the Montreal Protocol of 1989 to preserve the ozone layer by controlling the production, use and trade of destructive chemicals.
There may be some doubt as to how effectual these agreements may be, given that some countries still maintain an “I-don’t-care” attitude. Their attitude is probably due to their failure to grasp the importance of the problem. Then, there is no doubt that environmental education on an international scale（規(guī)模）is greatly needed, so that all countries, great and small—the “haves” and the “have nots”—may realize their responsibilities for our planet.
In the meantime, the UNEP seems to have taken steps in the right direction, and it is hoped that in the not so distant future, all nations of the world will join hands in saving mother earth.
【小題1】Which of the following is a reason for the cutting and burning of forests?

A．To build houses for more population.	B．To have land for agriculture.
C．To export trees to other countries.	D．To build industrial plants.

【小題2】The holes in the ozone layer are largely due to________.

A．man’s research activities	B．the greenhouse effect
C．the ultraviolent	D．harmful chemicals

【小題3】Why don’t some countries care about the problem of the environment?

A．They don’t want to put their lives in danger.

B．They just don’t know how to solve the problem.

C．They haven’t realized the seriousness of the problem.

D．They don’t want to break their international commitment.

【小題4】66. What is the author’s attitude towards the future of the environment?

A．Hopeful.

B．Unconcerned

C．Doubtful

D．Objective

About 35 percent of British adults sleep with teddy bears. Many more share a bed with a partner or spouse. Others still co - sleep, alongside children in a family bed.
But lying with your iPad? A recent survey by marketing agency Rosette found that 68 percent of tablet owners use the device in the bedroom, more than in any other location. The living room took a close second place, at 63 percent, reports AdAge. com, and only 45 percent of respondents said they use their tablets on the go.
But bringing devices into the bedroom is a bad idea, if quality rest is your goal. One of the most important factors of sleepiness is darkness, which signals to the brain that it’s time to start speeding up production of the sleep - inducing hormone melatonin. But as the New York Times points out, in our modern world, we are exposed to light long after the sun sets. While any type of light can disturb your sleep, the blue wavelength light given off by cell phones, laptops, tablets and other gadgets is particularly troublesome. Research shows that this blue light causes alertness so decisively that it can actually be used to fight tiredness.
According to the National Sleep Foundation, 95 percent of Americans use some device, whether it’s a TV, laptop, cell phone or other products, within an hour of killing time. “Artificial light exposure between dusk and the time we go to bed at night push our sleeping sense to a later hour - making it more difficult to fall asleep,” said Charles Czeisler, Ph. D. , M. D. , chief of the division of sleep medicine at Brigham and Women’s Hospital in Boston.
Instead, experts recommend turning off all devices an hour before bedtime and finding another method for relaxation, like reading a book, taking a warm bath or performing a series of calming yoga poses. It’s also a good idea to exercise and lay off the caffeine several hours before bedtime.
【小題1】 According to a recent survey, most tablet owners use their iPad ________.

A．in the living room	B．in the bedroom
C．in the office	D．on the move

【小題2】 What can we know from this passage?

A．The light from cell phones is harmful

B．Modern people have trouble falling asleep

C．Darkness can create a good sleeping environment

D．Blue light can prevent sleepiness decreasing

【小題3】If we often play with a laptop just before sleep, we’ll be more likely to ________.

A．dream of it

B．stay awake

C．feel sleepy

D．become tired

With the Tesla Roadster and other plug­in (插入式) electric vehicles hitting the road，demand is growing for accessible refueling points to recharge(充電) them. Carbon Day Automotive, a Chicago­based company，has now demonstrated（演示）a solar­powered recharging point, known as the Solar Plug­In Station，which lets motorists easily charge their cars using electricity that has been produced without any environmental damage.
The Solar Plug­In Station has gone on show in Chicago as part of the city’s bid（競標）to host the 2016 Olympic Games. According to Carbon Day Automotive，the Solar Plug­In Station on show in Chicago is part of the vital infrastructure(基礎設施) required for electric vehicles in Chicago and was the focus of a recent visit by the International Olympic Committee.
These solar­powered electricity points will be used daily to fuel the city’s electric vehicles with power from the sun. By producing the electricity from pollution­free solar cell, the CO2 emissions are reduced to zero.
“Solar energy and electric vehicles are a partnership that is one more step to reducing our dependence on foreign oil,” says Richard Lowenthal, CEO of Coulomb Technologies.Coulomb Technologies recently developed the components (部件) required for individual recharging stations，marketed as ChargePoint Networked Charging Stations.Carbon Day Automotive is the Midwest distributor for the ChargePoint stations. The Solar Plug­In Station consists of giant solar panels (電池板) that shade the tiny ChargePoint Networked Charging Station.The solar panel is connected to an underground battery pack，ready for everyday refueling.
“Without these stations it would be like driving around in a traditional car without the availability of gas stations，” says Scott Emalfarb，CEO at Carbon Day.“The day of true plug­in electric vehicles will be here sooner than most people realize and the world needs to be ready to accommodate（為……提供場地）them.”
【小題1】The Solar Plug­In Station is used as part of the bid to host the Olympics mainly because ________.

A．it’s environmentally friendly

B．it makes up for the lack of electricity

C．it’s a new idea and attracts people’s attention

D．it brings convenience to electric vehicle users

【小題2】We can learn from the passage that ________.

A．to recharge the electric vehicles takes a long time

B．the Solar Plug­In Station will come into use in 2016

C．the Solar Plug­In Station has gone on show internationally

D．Chicago is promoting the use of electric vehicles

【小題3】According to the passage，how many of the following statements are TRUE?
a. Tesla Roadster is a kind of plug­in electric vehicle.
b. The Solar Plug­In Station uses solar power to charge all of the cars.
c. Chicago is a city，which is rich in oil.
d. The Solar Plug­In Station consists of underground battery packs.
e. Scott Emalfarb is optimistic about the future of plug­in electric vehicles.

A．2.

B．3.

C．4.

D．5.

【小題4】The passage implies that when the Solar Plug­In Station becomes popular，________.

A．more visitors will come to Chicago

B．the citizens of Chicago will be able to go to work faster

C．more space for electric vehicles will be needed

D．the cost of electric vehicles will be lower than traditional cars

【小題5】What would be the best title for the passage?

A．Chicago Will Soon Be Full of Electric Vehicles

B．Chicago Calls on People to Buy Electric Vehicles

C．Chicago Fights for Its Bid to Host the 2016 Olympics

D．Chicago Shows Its Solar­powered Recharging Stations

When an ant dies, other ants take it out of the nest, often within an hour after its death. This behavior interests scientists and they wonder how ants know for sure—and so soon—that another ant is dead.
One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist, a scientist who studies animals and plants. He found that ants have a chemical on the outside of their bodies that signals to other ants, “I'm dead—take me away” when it is dead.
But there's a question to answer: As we know, if an ant is dead, it stops moving. But when an ant is sleeping or knocked unconscious, it is also not moving. However, other ants don't move the living ant out of the nest. How do they know this ant is not dead? Choe found that ants have another chemical on their bodies, which tells nearby ants something like, “Wait—I'm not dead yet” when it is not dead. Choe suspects that when an ant dies, the chemical that says, “Wait— I'm not dead yet” quickly goes away. When other ants detect the “dead” chemical without the “not dead yet” chemical, they move away the body.
To test his theory, Choe and his team put different chemicals on ants. When the scientists used the “I'm dead” chemical, other ants quickly moved the treated ant away. When the scientists used the “Wait—I'm not dead yet” chemical, other ants left the treated ant alone. Choe believes this behavior shows that the “not dead yet” chemical overrides the “dead” chemical when picked up by other ants. And that when an ant dies, the “not dead yet” chemical dies away. Other nearby ants then notice the remaining “dead” chemical and remove the body from the nest.
Understanding this behavior can help scientists figure out how to stop ants from invading new places and causing problems.
【小題1】What is the function of the first paragraph?

A．Leading the following paragraphs.

B．Showing the main idea of the passage.

C．Introducing the background of the passage.

D．Giving a summary of the passage.

【小題2】Which of the following has the closest meaning to the underlined word “overrides” in the fourth paragraph?

A．is weaker than

B．is stronger than

C．is better than

D．is worse than

【小題3】What can we learn from the passage?

A．Living ants can also be taken away when they are not moving.

B．When an ant dies, it can tell others using a certain chemical.

C．A living ant can pretend to be dead using a special chemical.

D．Ants often use chemicals to communicate with each other.