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科目： 來源：安徽省模擬題 題型：閱讀理解

     Car sharing is another way to drive green that's gaining in popularity, especially in urban areas.
People who may not drive every day but still want a car to run errands （差事）or drive on weekends
benefit most from car sharing. Car sharing is usually run by a service like Zipcar, though there are
non-profit （非營利的）and informal car sharing services. Members pay a monthly fee and have
access to an entire fleet of cars when they need one. The cars are parked in fixed spots around the city,
so members only need to make a reservation, and then go to the pickup spot.
     Car sharing has major environmental benefits because it reduces the number of cars on the road.
Members don't drive just because they are in a car. They plan trips, and if they don't need a car, they
don't use one. Still, a car is available to them if they need to make a big trip to the grocery store, pick
someone up at the airport or if they want to go to the beach for the day. Members also benefit by
having access to a car without any of the headaches of ownership. They usually don't have to pay for the
gas, insurance or maintenance （保養(yǎng)）, and the monthly membership fee is less than a typical car
payment. So if you really want to go green but aren’t ready to totally give up a car yet, car sharing may
be the way to go.
     If you still need to get around, but want to go even greener than sharing a car, share a bus!
1. The author intends to tell us that car sharing ________.   
A. has become the most popular way to go to work
B. has become the best way to cut living costs
C. is becoming more and more popular in cities
D. is becoming popular both in urban and rural （鄉(xiāng)村的）areas
2. We can conclude from the passage that _________. 
A. Zipear can't help you if you are running urgent errands
B. Zipcar, different from other services, aims green driving with no profit
C. Zipcar is a company supplying car sharing service for a monthly payment
D. Zipcar is a company providing formal car sharing free
3. The second paragraph mainly tells us _________.    
A. why people will share a car          
B. why car sharing benefits the environment
C. why car sharing is cheaper than owning a car
D. why a car is available to members
4. Which of the following is NOT mentioned in the passage?
A. Car sharing has become a new trend （趨勢）. 
B. Car sharing can save you the headaches of ownership. 
C. Bus sharing is even greener than car sharing.
D. Zipcar is the largest company offering car sharing services.

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科目： 來源：安徽省模擬題 題型：閱讀理解

     In one of the strongest indications of the power of the mind to influence the body, a growing
collection of evidence finds that people who are depressed have a greatly higher risk of developing
heart disease.
     In a study of almost 3,000 men and 5,000 women, depressed men were 70 per cent more likely to
develop coronary (心臟的) heart disease than those who weren't depressed. While depressed women
were just 12 per cent more likely to develop heart disease, those who were severely depressed were
78 per cent more likely. In fact, a 1998 study found that women who are depressed have a risk of dying
from heart disease equal to that of women who smoke or who have high blood pressure.
     The link works the other way around, too: While about 1 in 20 American adults experience major
depression in a given year, that number jumps to about one in three among those who have survived a
heart attack.
     The more severe the depression, the more dangerous it is to your health. But some studies suggest
that even mild depression, including feelings of hopelessness experienced over many years, may damage
the heart. Other studies suggest depression may affect how well heart disease medications work.
Researchers aren't sure what the connection between depression and heart disease is, but theories exist.
One is that people who are depressed tend not to take very good care of themselves. They're more
likely to eat high-fat, high-calorie "comfort" foods, less likely to exercise, and more likely to smoke. But
beyond lifestyle, there is probably also a physiological link between depression and heart disease.
Recent studies found that people with severe, depression tended to have a lack of heart-healthy 0-3
fatty acids. People who are depressed also often have high levels of stress hormones (荷爾蒙). These
keep the body primed for fight or flight, raising blood pressure and causing the heart to beat faster, all
of which put additional stress on coronary arteries (動脈) and prevent the body's natural healing
mechanisms from working properly.
     A whole branch of medicine is devoted to the complex links between mental health, the nervous
system, the hormone system and so on. This science is gradually sorting out how the mind-body
connection affects us, or defenses against heart disease.
     Generally, an estimated 10 per cent of American adults experience some form of depression every
year. Although available treatments can ease symptoms in more than 80 per cent of people treated, less
than half of those with depression get the help they need.
1. Which of the following can be the best title of the passage?
A. Depression — Heart Disease Risk Factor.      
B. Heart Disease — Health Killer.
C. Depression — Mental Health Enemy.    
D. Heart Disease — Depression Factor.
2. Which statement is NOT true according to the passage?
A. With high blood pressure, depression is another potential risk to women's health.
B. Depression, which is mild, can possibly cause damage to your health.
C. Most people who experience depression get treated as they should be.
D. Depression may have some influence on the function of heart disease medication.
3. According to the passage, the possible connections between heart disease and depression are the
following EXCEPT ______
A. depressed ones tend to eat high-fat and high-calories foods, which leads to physical damage to heart
B. severe heart disease may cause people to feel hopeless and depressed
C. depression may result in the lack of some kind of acids, which probably affects the working of
people's heart
D. people with depression often have a high level of stress hormones, maybe, which will put extra
pressure on one s heart
4. We can infer from the passage that ______.
A. more researches will be done to find the certain links between heart disease and depression
B. the percentage of adults with depression is higher than that of depressed adults with heart disease
C. one's lifestyle has relatively little relationship with one's mental health
D. those with depression have a higher risk of developing heart disease
5. The meaning of the word symptoms in the last paragraph is _____________.
A. 診斷
B. 癥狀
C. 處方
D. 患者

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科目： 來源：山西省模擬題 題型：閱讀理解

閱讀理解
     With alarming regularity, we read about oil tankers having accidents near land and the terrible
consequences of the oil spills(泄露) on people, nature, and the environment.
     Millions of dollars have been used in developing special chemicals to help dismiss the spills and to
clean up the animals, beaches, and land spoiled by the oil. Unfortunately, when many of these chemicals
are used, more damage is caused to the environment, especially to lives in the sea.
     Of all today's environmental disasters, an oil spill may actually be one of the least serious. Although oil
is poisonous, it is a natural material. In the end, it breaks down naturally. There are, of course, long-term
effects, but it is usually more serious in the short term.
     Nature by itself works better than chemical materials, but when there is a spill, we demand that
governments act immediately with as much hi-tech knowledge as possible. In 1967 the tanker Torrey
Canyon sank off the Scilly Isles near the coast of England and spilled 120,000 tons of oil into the ocean.
If you go there today, you will find it hard to see any sign that it ever happened.
     Governments seem to accept the risk of transporting millions of tons of oil by ship every day so that
we can fill up our cars and drive around and cause even more environmental damage. Interestingly, the
biggest companies in the world produce cars, and the next biggest supply the gasoline to make them run.
     We should be thinking more about reducing our dependency on oil. Govern
-ments should be encouraging research into new technologies, such as cars run by solar power, electricity, hydrogen, and so on. Much of this research has, in the past, been held back by the oil, gas, and coal.
     If the world's millions of cars were 10% more efficient -and the industry could easily produce cars at
least twice as efficient, we would need many fewer tankers crossing the oceans each year. If this happened, the risks of oil spills would be reduced, and the air we breathe would be cleaner and fresher, too.

1. What is the passage mainly talking about?
A. Oil spills pollution.  
B. What oil pollution is.
C. Oil tanker accidents.          
D. How to reduce oil pollution.

2. How does the author support the idea that oil spills are not as serious as people believe?
A. By giving a description.    
B. By making an argument.
C. By giving an example.      
D. By drawing a diagram.

3. What does the underlined word "risk" in Paragraph 5 refer to?
A. Transportation depending more on oil.
B. Poisonous oil breaking down naturally.
C. Millions of tons of oil spilling into the sea.
D. More environmental damage being caused.

4. Which suggestion is made for reducing oil tank accidents according to the passage?
A. We should build safer tankers in the near future.
B. We should develop new technologies to cut oil use.
C. Tankers should not be allowed to sail near the coastlines.
D. Countries should build more oil pipelines under the sea.

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科目： 來源：山西省月考題 題型：閱讀理解

閱讀理解

     Earlier this month, the Obama Administration called for increasing protection of the world's most
southern continent, Antarctica. Scientists say climate change and human activities have increasingly led
to the melting of massive pieces of Antarctic ice. The disappearance of ice will not only affect wildlife
in the area such as seals and penguins. The melting will also cause oceans and seas around the world
to rise.
     This represents a major threat, especially to coastal areas. For example, the ancient city of Venice,
Italy has long been threatened by rising sea levels. The situation is made worse by the fact that its
ancient buildings, built on a body of water called a lagoon(淡水湖), are slowly sinking. When the city
was founded about 1,600 years ago, the level of the Adriatic Sea was almost two meters lower than it
is today.  
     Rising sea levels are not the only threat. The salty water is also destroying Venice's famous buildings
and artworks. The Italian government is trying to fix the problem with the construction of a
seven-billion-dollar system of moving flood barriers.  
     Climate change is also leading to the melting of ice in other areas, such as Mount Kilimanjaro in
northeastern Tanzania. It is the highest point in Africa, measuring almost 6,000 meters. The mountain
supports five vegetation zones and many kinds of animals.
     The ice glaciers on the mountain are disappearing very quickly. This will have a bad effect on the
mountain's ecosystems and on Tanzania's travel industry. Also, a valuable record of thousands of years
of weather history will also be lost if the ice melts. Scientists study pieces of glaciers to understand
weather patterns from thousands of years ago.  
     In the United States, the icy masses in Glacier National Park in Montana may soon completely
disappear because of climate change. In 1850, it is estimated that there were 150 glaciers in the more
than 400,000 hectare park.  
     There are 26 glaciers remaining today. Scientists estimate that the glaciers will be gone by 2030.
Warming temperatures are also threatening the many kinds of plants and animals that live in this mountain
ecosystem.

1. The writer developed the passage mainly by ______.
A. giving examples              
B. listing reasons    
C. making comparisons          
D. using quotations

2. How many glaciers have disappeared since 1850 in Glacier National Park?
A. 150.          
B. 26.      
C. 400,000.      
D. About 124.

3. According to the passage, what has been affected in Italy by rising sea levels?
A. Many kinds of plants and animals died out in Italy.
B. Venice's famous buildings and artworks are being destroyed completely.
C. The ice glaciers on the mountain are disappearing very quickly.
D. Its ancient buildings could be drowned.

4. What could be the best title for the passage?
A. Climate Change        
B. The Melting of Massive Pieces of Antarctic Ice
C. Visiting Endangered Places around the World
D. The disappearing of the Ice Glaciers

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科目： 來源：山西省月考題 題型：閱讀理解

閱讀理解
根據(jù)短文內(nèi)容,從短文后的選項中選出能填入空白處的最佳選項.選項中有兩項為多余選項。
     Traditional fisheries may no longer be the world's most important provider of fish.  1 . The Food and
Agriculture Organization says aquaculture is growing by a rate of 6.6 percent a year.
     Aquaculture now produces forty-six percent of the world's supply of fish.  2 . The report also said
aquaculture earned more money in 2008 than traditional fisheries.
    In aquaculture, fish are raised in tanks or small bodies of water called ponds. They also are raised in
cages or nets in oceans, lakes and rivers.
     The report says increased aquaculture has helped people around the world eat record amounts of
fish.  3. But the FAO says the current yearly wild-fish harvest of 90 million tons shows no improvement.
Decreasing numbers of fish and stronger catch limits have reduced the possibilities for catching wild fish.
     The FAO report says about thirty-two percent of world supplies are overfished, depleted(大量削減)
or recovering. It said these supplies of fish need to be urgently rebuilt.
      4. They say the nets and cages permit fish diseases and pests to spread. Some aquaculture critics
doubt that aquaculture can keep growing at the current rate. But Wally Stevens of the trade group
Global Aquaculture Alliance says the industry must continue developing to feed growing populations.
     Mr. Stevens says a one hundred percent increase in fish farming over ten years is necessary to keep
providing for people at the current level. He notes that aquaculture creates jobs and wealth, especially
for people in coastal areas of China. The FAO reports that China remains the world's largest
fish-producing nation.  5.
A. Hungary is rich in waterways, but traditionally most Hungarians eat fish only at Christmastime.
B. A new United Nations report shows that fish farming or aquaculture may soon lead fish production.
C. Last week a study of one hundred ninety-nine countries and territories confirmed what many people
may have already noticed.
D. The FAO says each person ate an average of almost 17 kilograms of fish last year.
E. China produces more than sixty percent of the world's farmed fish.
F. That represents a forty-three percent increase from 2006.
G. Some scientists have criticized aquaculture.

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科目： 來源：山西省月考題 題型：閱讀理解

     Almost everyone loves trees, but do you know that tree can help sick people recover faster?
     It's true. According to the International Society of Arboriculture (樹木培植), hospital patients have
been shown to recover faster when they are given a view with trees. Also, while trees certainly benefit
any landscape, whether lining streets, decorating urban areas, or growing naturally in the forest, they are
actually important in our daily lives.
     Trees improve the quality of the air around us by absorbing dust and other particles(顆粒物). Their
leaves also absorb harmful gases before we have a chance to take them in. They also protect us from the
sun, rain, hail(冰雹), and snow, which can quickly damage unprotected homes. Even better, they often
clean oxgiygen for us to breathe.
     Trees make economic sense. A home surrounded by trees costs less to cool and heat.
Neighborhoods with trees are often several degrees cooler in summer than those in similar climates that
don't have trees.
In winter, trees can keep houses warmer by blocking strong winds. Also, less water is needed to water
grass and gardens in tree-shaded areas where the sun isn't constantly shining.
     Besides that, trees can further improve privacy, block unpleasant views, and increase the value of
your home. Unfortunately, these days, construction projects tend to wipe out all the trees in an area
before creating new neighborhoods and buildings. That's more important than ever to plant a tree in
your community.
1. The best title of the passage is about______.
A. planting a tree in your community
B. planting a tree in your family
C. improving people's privacy
D. improving people's life
2. Trees change the quality of air because______.
A. they can protect us from natural disasters
B. they can take in much dust and other particles
C. they often clean oxgiygen for us to breathe
D. they are of great importance in our daily life
3. According to the passage, we know that ______ is wrong.
A. trees can offer people a good place to cool
B. trees can make people get warmer
C. trees can bring people many benefits
D. trees are likely to be damaged by people

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科目： 來源：浙江省月考題 題型：閱讀理解

Below is some advice on how to prevent cancer:
                                          8 Ways to Avoid Cancer in Your Life
1. Eat Blueberries
Aside from being a healthy and delicious snack, blueberries contain pterostilbene, which has important
colon(結(jié)腸) cancer-fighting prosperities. But wait, it gets better. Blueberries also offer a large dose of
vitamins C (14 milligrams per cup). So at breakfast, try to take in a cup and a half of blueberries in your
cereal or yogurt, or mixed with other berries.
2. Drink Pomegranate(石榴)Juice
The deep red juice of the pomegranate contains polyphenols, isoflavones and ellagic acid, which together
create a powerful anticancer mixture. Most recently, researchers from the University of Wisconsin at
Madison has discovered that 16 ounces of pomegranate juice per day also may inhibit the growth of lung
cancer.
3. Relax
Feeling stressed or worried? Find ways to relax and you may reduce your chances of developing cancer.
Purdue University researchers tracked 1,600 men over 12 years and found that half of those with high
levels of worry died during the study period. Only 20 percent of the optimists died before the study were
completed, while 34 percent of the extremely anxious men died of some type of cancer. Instead of
stressing about the past or future, focus on the present and relax!
4. Take Selenium(硒)
Selenium is well known for its cancer-fighting properties. In a study of almost 1,000 men, researchers
from the Journal of the National Cancer Institute found that when men with the lowest initial levels of
selenium in their bodies received a daily supplement over a 4 year period, they cut their prostate(前列腺) cancer risk by a remarkable 92 percent. However, it is possible to get too much of a good thing, so
monitor your intake of selenium-containing supplements, Brazil nuts, tuna, meats and grains carefully.
5. Eat Sushi(壽司)
Seaweed may not be your idea of a great snack, but it is high in fiber, calcium and iron, and dry, roasted
seaweed sheets used in sushi provide the additional benefits of vitamins A and C. Sushi rolls are also high
in protein- a typical spicy tuna roll has only 290 calories but packs 24 grams of protein. So don't skimp
(節(jié)省)on the Sushi!
6. Enjoy the Outdoors
Vitamin D causes early death of cancer cells. A study published in the American Journey of Clinical
Nutrition reported that women who supplemented their diets with 1,000 international. Units of vitamin
D every day had a 60 percent to 77 percent lower incidence of cancer ever a four-year period that did
women taking a placebo(無效對照劑). Experts recommend supplementing your fun in the sun with
1,100 to 2,000IU of vitamin D each day.
7. Breathe Clean Air
There's no question that secondhand smoke kills. A recent American Journal of Public Health study
showed that nonsmokers working in smoky places had three times the amount of carcinogen(致癌物質(zhì))
in their urine(尿) than nonsmokers working in smoke-free locations. What's worse, their levels of the
carcinogen rose 6 percent for every hour worked. Nine states have banned smoking in all workplaces,
bars and restaurants. The message is clear: Do whatever you can to avoid the cloud of smoke.
8. Break a Sweat
Even a small amount of exercise can offer major cancer-fighting benefits. In a study of 29,110 men
published in the International Journal of Cancer, men who exercised just once a week had a percent
lower risk of metastasis(轉(zhuǎn)移性) prostate cancer than men who didn't work out at all. The better the
frequency, duration and intensity of the exercise, the bigger the reduction in risk, according to the study.

1. To prevent yourself from catching colon cancer, you should eat ____ as often as possible.
A. sushi    
B. blueberries    
C. pomegranates    
D. Vitamin D
2. A person is very likely to catch some type of cancer if ______.
A. he is very fond of exercise every day.
B. he is addicted to smoking  
C. he is always feeling extremely stressed or worried
D. he likes to have meals in restaurants
3. _____ will remarkably reduce the risk of men's prostate cancer.
A. Having a daily supplement of selenium
B. Drinking a cup of pomegranate juice every day
C. Breathing fresh air now and then
D. Taking exercise at least once a week
4. If you want to keep cancer away, it is particularly important to ______.
A. have a daily supplement of vitamins B and C
B. try to ignore the secondhand smoking
C. take in as many selenium-containing supplements as possible
D. having exercise as often as possible

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科目： 來源：安徽省模擬題 題型：閱讀理解

閱讀理解
     Depression(抑郁癥) is a serious problem today. Depression causes workers to be unpro- ductive,
causing companies and countries to lose billions of dollars. One expert says that de- pression is like cancer
because it is "widespread, costly and deadly". Depression hits one per- son in five around the world.
     Although people have believed depression to be a problem among the rich and educated, studies show
that depression is a problem among everyone. Over any six-month period, be- tween five to seven percent
of the world's 15opulation will be suffering from a serious depres- sion.
     Suicide rates among people suffering from the disease in its extreme, or clinical form were 80 percent
higher than in the population at large, and sufferers were four times more likely to have heart attacks.
People who suffer from depression often have problems sleeping, getting up on time, and doing work
unproductively.
     Depression, which researchers agree, has its origin in the genes, brings loss of confi- dence and ability
to concentrate   making it impossible for employees and managers to work efficiently.
     Depression is made more serious in China by Chinese inability to face it. Many people believe that
depressed people are either weak or lazy. Besides, there is no good treatment, with few specialists
available.
     "Most patients in China just don't get help," a Chinese doctor says. "In my hospital, I have to see 30 or
40 patients in a morning, just have time to say ' Hello, how do you feel?'"
     In Western countries, people are not afraid to admit that they have depression, but most do not tell it to
their boss, because they fear that their boss would fire them.
     "In my experience, aging bosses are the most willing to admit they have it, because they feel the most
Secure about themselves." an American doctor says.
     Hopefully, in the near future, people around the world will be able to admit that they have depression so
that they can get the right treatment.
1. Which of the following is TRUE according to the passage?
A. It is widely believed that everyone may suffer from depression.
B. Depression brings great problems to its sufferers in their life and work.
C. Depression is a commonly--existing problem only in rich countries.
D. The poorer and the less educated a person is the less he will suffer from depression.
2. Depression becomes more serious in China because of        .
A. the pressure of unemployment
B. the lack of treatment and doctors
C. their unwillingness to tell it to their bosses
D. the doctor's careless work
3. Compared to normal people, the depressed people are likely to be      .
A. very unconfident and often absent--minded
B. easy to avoid being hit by heart attacks
C. working efficiently and productively
D. either weak or lazy
4. The underlined phrase "at large" is the closest in meaning to      .
A. widely        
B. as a whole      
C. in a large quantity    
D. largely
5. What can we infer from the passage?
A. People are suffering from depression because of the shortage of specialists.
B. The aging bosses around the world dare to say they are depressed.
C. More and more patients will turn to specialists for help.
D. Western people are braver than Chinese people.

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科目： 來源：河北省模擬題 題型：閱讀理解

閱讀理解。
     Do you find getting up in the morning so difficult that it's painful? This might be called laziness, but
Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
     During the hours when you labour through your work you may say that you're "hot". That's true.
The time of day when you feel most energetic is when your cycle of body temperature is at its peak.
For some people the peak comes during the forenoon. For others it comes in the afternoon or evening.
No one has discovered why this is so, but it leads to such familiar monologues (自言自語) as: "Get up,
John! You'll be late for work again!" The possible explanation to the trouble is that John is at his
temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives
realize what these energy cycles mean, and which cycle each member of the family has.
     You can't change your energy cycle, but you can learn to make your life fit it better. Habit can help,
Dr. Kleitman believes. Maybe you're sleepy in the evening but feel you must stay up late anyway.
Counteract (對抗) your cycle to some extent by habitually staying up later than you want to. If your
energy is low in the morning but you have an important job to do early in the day, rise before your usual
hour. This won't change your cycle, but you'll get up steam (鼓起干勁) and work better at your low
point. Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on
the edge of the bed a minute before putting your feet on the floor. Avoid the troublesome search for
clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon
and save tasks requiring more energy or concentration for your sharper hours.
1. If a person finds getting up early a problem, most probably ________.        
A. he is a lazy person
B. he refuses to follow his own energy cycle        
C. he is not sure when his energy is low  
D. he is at his peak in the afternoon or evening
2. Which of the following may lead to family quarrels according to the passage?    
A. Unawareness of energy cycles.
B. Familiar monologues.
C. A change in a family member's energy cycle.
D. Attempts to control the energy cycle of other family members.
3. If one wants to work more efficiently at his low point in the morning, he should________.  
A . change his energy cycle          
B. get up earlier than usual
C. overcome his laziness            
D. go to bed earlier
4. You are advised to rise with a yawn and stretch because it will ________.  
A. help to keep your energy for the day's work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day

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科目： 來源：月考題 題型：閱讀理解

閱讀理解。
     More than three billion people are at risk from indoor air pollution because of the heating or
cooking fuels they use. Most live in Africa, India and China. They use wood, crop waste, animal
waste or coal. These solid fuels may be the least costly fuels available. But they are also a major
cause of health problems and death.
     The Aprovecho Research Center has been designing cooking stoves for the developing world.
People having less money use wood or biomass for cooking; the richer people use oil and gas. It's
estimated that wood is running out more quickly than oil and gas.
     The group has made stoves using mud, bricks, sheet metal, clay, ceramics and old oil drums.
Most of the stoves look like large, deep cooking pots. They have an opening at the bottom for the
fire and a place on the top to put a pot.
     In the late 1970s, Aprovecho produced a popular stove called the Lorena. The Lorena was
good at reducing smoke and warming homes. But new tests years later found that it was not efficient.
The Lorena used twice as much wood as an open fire, and it took much longer to heat food. Since
then, they have experimented with countless other designs.
     Their goal is to make an inexpensive stove-let's say five dollars-that makes little smoke, and it's
safe for health and reduces global warming and deforestation(采伐森林)．
     Aprovecho has now partnered with a stove manufacturer in China. The company is making
Aprovecho's first mass produced stoves. They are said to use 40%-50% less wood than an open
fire, and produce 50%-70% less smoke. A company called StoveTec is selling them through its
website for less than ten dollars. Dean Still says that more than one hundred thousand have been
sold so far.
1. The underlined word "biomass" in Paragraph 2 refers to ________.
A. oil and gas
B. wood
C. coal
D. crop waste or animal waste
2. The following sentence is taken from the passage, it should be placed at the end of ________.
The World Health Organization estimates that over 1,500,000 people a year die from breathing smoke
from solid fuels.
A. Paragraph 1.              
B. Paragraph 2.
C. Paragraph 3.              
D. Paragraph 4.
3. Stoves designed by the Aprovecho Research Center should    be ________.

①luxurious
②costly
③efficient
④lowcarbon
⑤cleaner
A．①②④  
B．③④⑤
C．②③⑤  
D．①③④

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