【推荐1】If humans pump enough carbon dioxide (CO₂) into the atmosphere, the stratocumulus clouds(层积云 ) could disappear, and the earth's temperature could climb sharply to heights not predicted in current climate models. It would burn the planet. That's the conclusion of a paper published in the journal Nature Geoscience and described in detail by Natalie Wolchover for Quanta Magazine.

As Wolchover explained, clouds have long been one of the great uncertainties of climate models. Computer models that easily capture the complexity and detail of most climate systems just aren't powerful enough to predict worldwide changes in cloud behavior. But clouds are important. They reflect sunlight away from the earth's surface. And stratocumulus clouds are those white blankets you might have seen as you looked out the window of arm airplane, rolling out below you and hiding the ground Researchers suspect that certain sudden, past jumps in temperature may have been caused by changes to clouds like these.

For the new research, scientists modeled just a small patch of sky using a supercomputer. They found that if carbon dioxide levels reach about 1, 200 parts per million(ppm) in the atmosphere, stratocumulus clouds break up. That's a very high carbon dioxide concentration.   Right now, levels have climbed past 410 ppm--a dangerous change from 280 ppm before the Industrial Revolution.

But humans put more and more CO₂ into the atmosphere every year. If current trends continue, the earth could reach 1, 200 ppm within 100 to 150 years. This could happen if our society doesn't follow through on any of its commitments to reduce emissions(排放), Wolchover reported. And even if it does, the result would be another 8 degrees Celsius of heat added to the global average, on top of the dangerous changes already underway due to greenhouse gases.

That’s an enormous change, and it goes beyond predictions of worldwide ice melt and catastrophic sea level rise. And, once the stratocumulus clouds are gone, Wolchover reported, they likely wouldn't reappear until atmospheric carbon dioxide levels dropped below where they are currently.

There's still some uncertainty in the data. The 1, 200 ppm figure could change as scientists look into the issue further.

1. What can we learn from paragraph 2?

A．Most climate systems are not complex.

B．Cloud behavior is uncertain and hard to predict.

C．Temperature changes affect the stratocumulus clouds.

D．The stratocumulus clouds protect planes from sunlight.

2. How did the scientists study clouds in the new research?

A．By measuring the sea level.

B．By experimenting in a natural state.

C．By comparing climate models.

D．By computer modeling and analyzing.

3. What does "it" refer to in paragraph 4?

A．The atmosphere.

B．The earth.

C．Our society.

D．The result.

4. Which of the following statements would Wolchover most probably agree with?

A．The effects of CO2 emissions have been fully assessed.

B．The stratocumulus clouds won't return if they are gone.

C．The breakup of stratocumulus clouds could result in catastrophes.

D．Once CO2 level reaches 1, 200 ppm, stratocumulus clouds will go extinct.

【推荐3】阅读下面短文，根据题目要求回答问题。

Balancing Trees and CO₂

Tree planting used to be regarded as an effective means of reducing climate change. Perhaps it’s time for us to rethink this practice. Trees pull CO₂ from the air. This effectively removes CO₂ from the atmosphere. But trees only hold onto CO₂ as long as they’re alive. Once they die, trees decay (腐烂) and release that CO₂ back into the atmosphere.

Recent studies have found that trees around the world are growing faster than ever. The rise of CO₂, mainly due to burning fossil fuels, is probably driving that rapid growth, said Roel Brienen, a forest ecologist at the University of Leeds, UK. High levels of CO₂ are increasing temperatures, which in turn speeds tree growth in those areas, he added.

The faster trees grow, the faster they store carbon. It seems like good news. However, it is known that fast-growing tree species, in general, live shorter lives than their slow-growing relatives.

In order to see whether the growth-lifespan trade-off (生长与寿命之间的权衡) is a universal phenomenon, Brienen and his colleagues analyzed over 210,000 individual tree ring records of 110 tree species from more than 79,000 sites worldwide. They found that, in almost all habitats and all sites, faster-growing tree species died younger than slow-growing species, and even within a species, the trade-off between growth and lifespan held strong.

The team also created a computer program that modeled a forest and tweaked (微量调整) the growth of the trees in this model. Early on, it showed that “the forest could hold more carbon as the trees grew faster”, Brienen reported. But after 20 years, these trees started dying and losing this extra carbon again. “We must understand that the only solution to bringing down CO₂ levels is to stop emitting (排放) it into the atmosphere,” said Brienen.

1. What does “this practice” in Para.1 refer to?
2. Why are trees around the world growing faster than ever?
3. Read the following statement, underline the false part of it and explain the reason.
 The team has found that the faster trees grow, the faster they store CO2, and the longer lives they live.
4. Please briefly present what you can do in daily life to reduce the emission of CO₂ . (about 40 words)

【推荐1】“Birds” and “airports” are two words that, paired together，don’t normally paint the most harmonious picture. So it really raises some eyebrows when China announces plans to build an airport that is for birds.

Described as the world’s first-ever bird airport, the proposed Lingang Bird Sanctuary(保护区）in the northern coastal city of Tianjin is, of course,not an actual airport. Rather，it's a wetland preserve specifically designed to accommodate hundreds-even thousands-of daily takeoffs and landings by birds traveling along the East Asian-Australian Flyway. Over 50 species of migratory (迁徙的）water birds，some endangered, will stop and feed at the protected sanctuary before continuing their long journey along the flyway.

Located on a former landfill site，the 150-acre airport is also open to human travelers.(Half a million visitors are expected annually.) However，instead of duty-free shopping，the main attraction for non-egg-laying creatures at Tianjin’s newest airport will be a green-roofed education and research center, a series of raised “observation platforms” and a network of scenic walking and cycling paths totaling over 4 miles.

“The proposed Bird Airport will be a globally significant sanctuary for endangered migratory bird species, while providing new green lungs for the city of Tianjin.” Adrian McGregor of an Australian landscape architecture firm explained of the design. Frequently blanketed in smog so thick that it has shut down real airports, Tianjin is a city---China’s fourth most populous----that would certainly benefit from a new pair of healthy green lungs•

1. The underlined phrase “non-egg-laying creatures” in Paragraph 3 refers to?

A．Visitors.	B．Designers.
C．Endangered water birds.	D．Planes.

2. What do we know about the airport according to the passage?

A．People cannot watch birds up close here.

B．It is located on a 150-acre landfill site.

C．It functions as an actual airport and a wetland preserve.

D．It provides migratory birds with food and shelter.

3. What can we infer from the last paragraph?

A．The airport will become a permanent home for birds.

B．Tianjin will win worldwide fame in the future.

C．Tianjin’s air quality will improve thanks to the airport.

D．Tianjin will be able to accommodate more people.

4. What is this passage mainly about?

A．Airports shut down and open up.

B．China is to open the first Bird Airport.

C．Airports turn into green lungs.

D．Birds are no longer enemies to airports.

【推荐2】I. M. Pei, whose modern designs and high-profile projects made him one of the best-known and most prolific architects of the 20th century, has died. He was 102. A spokesman for Pei’s New York architecture firm confirmed his death to the Associated Press. Pei, whose designs included a controversial renovation of Paris’ Louvre Museum and the Rock and Roll Hall of Fame in Cleveland, died overnight, his son Chien Chung Pei told The New York Times.

Ieoh Ming Pei, the son of an outstanding banker in China, left his homeland in 1935, moving to the US and studying architecture at the Massachusetts Institute of Technology and Harvard. After teaching and working for the US government, he went to work for a New York developer in 1948 and started his own firm in 1955.

The museums, municipal buildings, hotels, schools and other structures that Pei built around the world showed precision geometry (几何学) and an abstract quality with much respect for light. They were composed of stone, steel and glass and, as with the Louvre, Pei often worked glass pyramids into his projects.

The Louvre, parts of which date to the 12th century, proved to be Pei’s most controversial work, starting with the fact that he was not French. After being chosen for the job by the then president, François Mitterrand, surrounded by much secrecy, Pei began by making a four-month study of the museum and French history. He created a futuristic (未来主义的) 70ft-tall steel-framed, glass-walled pyramid as a grand entrance for the museum with three smaller pyramids nearby. It was a striking contrast to the existing Louvre structures in classic French style and was violently criticized by many French.

Pei said the Louvre was undoubtedly the most difficult job of his career. He said he had wanted to create a modern space that did not detract from the traditional part of the museum. “Contemporary architects tend to impose modernity on something,” he said in a New York Times interview in 2008. “There is a certain concern for history but it’s not very deep. I understand that time has changed, we have evolved. But I don’t want to forget the beginning. A lasting architecture has to have roots.”

When Pei won the international Pritzker Architecture Prize in 1983, he used the $100,000 award to start a programme for a spiring Chinese architects to study in the US. Even though he formally retired from his firm in 1990, Pei was still taking on projects in his late 80s, such as museums in Luxembourg, Qatar and his ancestral home of Suzhou.

1. What can we learn from the first three paragraphs?

A．Pei is famous for traditional designs in architecture.

B．Pei built the Rock and Roll Hall of Fame in Cleveland.

C．Pei put the elements of light and glass pyramids into the Louvre.

D．Pei set up his own firm with the help of a New York developer.

2. What was the French original attitude towards Pei’s job of the Louvre?

A．Positive.

B．Neutral.

C．Objective.

D．Critical.

3. What is the purpose of Paragraph 5?

A．To list the modernity of the Louvre innovation.

B．To explain Pei’s idea about the Louvre innovation.

C．To show Pei’s love for traditional culture.

D．To present Pei’s contributions to architecture in history.

4. Which of the following words can best describe Pei?

A．Creative and persistent.

B．Productive and stubborn.

C．Hard-working and humorous.

D．Tolerant and considerate.

【推荐3】 Somali pirates(海盗) robbed three Thai fishing ships with 77 sailors on board nearly l, 200 Miles off the Somali coast, the farthest-off-shore attack to date, an officer said Tuesday.

Pirates have gone farther south and east in answer to increased patrols(巡逻)by warships off the Somali shore. The robbing of the three ships Sunday was about 600 miles outside the normal operation area for the international force, said a spokesman.

The spokesman said the attack so far out at sea was a clear sign that the international patrols against pirates were having a “marked effect on pirate activity in the area”.

“Once they start attacking that far out, you’re not even really talking about the Somali basin or areas of water that have any connection with Somalia,” said an officer, Roger Middleton. “Once you’re that far out, it's just the Indian Ocean, and it means you’re looking at trade going from the Gulf to Asia, from Asia to South Africa.”

“This is the farthest robbing to date. They are now operating near the Maldives and India,” said another officer.

The three ships-the MV Prantalay 11, 12, and l 4—had 77 members on board in total. All of them are Thai, the spokesman said. Before the Sunday robbing, pirates held l l ships and 228 sailors.

Pirates have increased attacks over the past year in hopes of catching more dollar payments. Because of increased patrols and defenses on board ships, the success rate(率)has gone down, though the number of successful attacks has stayed the same year over year.

1. The pirate attack reported in the text happened __________.

A．far out in the Indian Ocean

B．in the normal patrol area

C．near the Somali coast

D．in the south of Africa

2. According to the text, which can best describe the situation of the pirate problems?

A．More goods on board are lost.

B．Pirate attacks happen in a larger area now.

C．The number of attacks has stayed the same these years.

D．Pirate attacks are as serious as before along the Somali coast.

3. Which is true about the warship patrols according to the text?

A．The patrols are of little effect.

B．The patrols are more difficult.

C．More patrols are quite necessary even in Asia.

D．The patrols only drive the pirates to other areas.

4. How many sailors were held by the pirates up to the time of the report?

A．228.

B．77.

C．383.

D．305.

【推荐1】There is an old saying in English: “Laughter is the best medicine”. Until recently, few people took the saying very seriously. Now, however, doctors have begun to investigate laughter and the effects it has on the human body. They have found evidence that laughter really can improve people’s health.

Tests were carried out to study the effects of laughter on the body. People watched funny films, while doctors checked their heart rate, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, the heart rate and the rate of breathing; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.

Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group, which tolerated the pain for the longest time, was the group, which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce endorphins（内啡肽）in the brain. These are natural chemicals that diminish both stress and pain.

There is also some evidence to suggest that laughter helps the body’s immune system, that is, the system which fights infection. In an experiment, one group of students watched a funny video while another group served as the control group-in other words, a group with which to compare the first group. Doctors checked the blood of the students in both groups and found that the people in the group that watched the video had an increase in the activity of their blood cells, that is, the cells which fight infection.

As a result of these discoveries, some doctors and psychiatrists（精神病学家）in the United States now hold laughter clinics, in which they try to improve their patients’ conditions by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

1. We learn from the first paragraph that laughter              .

A．is good for one’s health.	B．is related to some illness.
C．has been investigated long since.	D．has no effect on the body.

2. Doctors have found that laughter               .

A．keeps down blood pressure.	B．has similar effects to physical exercise.
C．decreases the heart rate.	D．increases stress.

3. Which of the following statements is NOT true of laughter, according to the passage?

A．It reduces pain.	B．It exercises the body.
C．It improves the body’s immune(免疫的)system.	D．It can cure   cancer.

4. In a laughter clinic, doctors             .

A．laugh at their patients.	B．encourage their patients to laugh.
C．smile when they don’t feel like laughing.	D．never stop laughing.

【推荐2】Bad luck always seems to strike at the worst possible moment. A man about to interview for his dream job gets stuck in traffic. A law student taking her final exam wakes up with a blinding headache. A runner twists his ankle minutes before a big race. These are all perfect examples of cruel fate (命运).

Or are they? Psychologists who study such common accidents now believe that in many instances they may be carefully arranged schemes of the subconscious mind and that people often engage in a form of self-defeating behavior known as self-handicapping-or, in plain terms, excuse-making. It’s a simple process: By taking on a crippling handicap, a person makes it more likely that he or she will fail at an endeavor (努力,事业).Though it seems like a crazy thing to do, researchers say it is actually a clever trick of the mind, one that sets up a win-win situation by allowing a person to save face when he or she does fail.

A classic self-handicapper is the French chess player Deschapelles who quickly became champion of his region. But when competition grew tougher, he adopted a new condition for all matches: He would compete only if his opponent would remove one of Deschapelles’ pawns (〈国际象棋中的〉兵,卒)and make the first move,increasing the odds (概率)that Deschapelles would lose. If he did lose, he could blame it on the other player's advantage; but if he won against such odds, he would be more respected for his amazing talents. Psychologists now use the term “Deschapelles coup” to refer to acts of self-handicapping prevailing in today’s world.

Overall, men are more likely than women to make excuses. Several studies suggest that men feel the need to appear competent in all realms, while women worry only about the skills in which they’ve invested heavily. Ask a man and a woman to go scuba diving (水肺潜水)for the first time, and the woman is likely to jump in, while the man is likely to first make it known that he's not feeling too well.

In fact, the people most likely to become chronic excuse makers are those obsessed with success, says the researcher. Such people are so afraid of being labeled a failure at anything that they constantly develop one handicap or another in order to explain their failures.

Self-handicapping may be an effective way of coping with performance anxiety. In the end, researchers say, it is a Faustian bargain (浮士德契约).Over the long run, excuse makers fail to live up to their true potential. And despite their protests to the contrary, they have only themselves to blame.

1. Which of the following is the chief topic of the passage?

A．An analysis on how people avoid failure.

B．A comparison between the ways men and women avoid failure.

C．The story of a classic self-handicapper, Deschapelles.

D．The psychological tricks some people use to avoid failure.

2. It can be inferred from the passage that a student who wanted to engage in self-handicapping would most probably____.

A．work as hard as possible for an important exam

B．try to cheat on a test to get a high score

C．get drunk the night before a big exam

D．take down only the key points in the class

3. Which of the following statements is TRUE according to the passage?

A．Men are more competent than women in most trades.

B．Deschapelles’ way of self-handicapping was to give his opponents more advantages.

C．By self-handicapping, Deschapelles succeeded in showing the true limits of his ability.

D．Men are more ready to face new challenges than women.

4. By saying “it is a Faustian bargain,” researchers mean that ____.

A．self-handicapping is often an effective method of dealing with anxiety

B．chronic excuse-making is an indication of one's depression

C．excuse-makers will suffer from the destructive behavior eventually

D．self-handicapping behavior is a difficult and complex process to understand

【推荐3】Massive changes in all of the world’s deeply cherished sporting habits are underway. Whether it’s one of London’s parks full of people playing softball, and Russians taking up rugby, or the Superbowl rivaling the British Football Cup Final as a televised spectator event in Britain, the patterns of players and spectators are changing beyond recognition. We are witnessing a globalization of our sporting culture.

That annual bicycle race, the Tour de France, much loved by the French, is a good case in point. Just a few years back it was a strictly continental affair with France, Belgium and Holland, Spain and Italy taking part in. But in recent years it has been dominated by Colombian mountain climbers, and American and Irish riders.

The people who really matter welcome the shift toward globalization. Peugeot, Michelin and Panasonic are multi-national corporations that want worldwide returns for the millions they invest in teams. So it does them literally a world of good to see this unofficial world championship become just that.

This is undoubtedly an economic-based revolution we are witnessing here, one made possible by communications technology, but made to happen because of marketing considerations. Sell the game and you can sell Coca Cola or Budweiser as well.

The skillful way in which American football has been sold to Europe is a good example of how all sports will develop. The aim of course is not really to spread the sport for its own sake, but to increase the number of people interested in the major money-making events. The economics of the Superbowl are already astronomical. With seats at US ＄125, gate receipts alone were a staggering ＄10,000,000. The most important statistic of the clay, however, was the ＄10,000,000 in TV advertising fees. Imagine how much that becomes when the eyes of the world are watching. Economic help to the development of world sports

So it came as a terrible shock, but not really as a surprise, to learn that some people are now suggesting that soccer change from being a game of two 45-minute halves, to one of four 25-minute quarters. The idea is unashamedly to capture more advertising revenue, without giving any thought for the integrity of a sport which relies for its essence on the flowing nature of the action.

Moreover, as sports expand into world markets, and as our choice of sports as consumers also grows, we will demand to see them played at a higher and higher level. In boxing we have already seen numerous, dubious world title categories because people will not pay to see anything less than a "World Title" fight, and this means that the title fights have to be held in different countries around the world!

1. Globalization of sporting culture means that ______.

A．more people are taking up sports

B．traditional sports are getting popular

C．many local sports are becoming international

D．foreigners are more interested in local sports

2. Which of the following is NOT related to the massive changes?

A．Good economic returns.

B．Revival of traditional games

C．Communications technology.

D．Marketing strategies.

3. What is the author’s attitude towards the suggestion to change soccer into one of four 25-minute quarters?

A．Favorable.	B．Unclear.
C．Reserved.	D．Critical.

4. This massage mainly discusses _________.

A．the commercialization of sporting culture

B．the worldwide popularization of sports

C．the economic help to the development of sports

D．the availability of sports watching to more people

【推荐1】There are two basic ways to see growth: one as a product, the other as a process. People have generally viewed personal growth as an external result or product that can easily be identified and measured. The worker who gets a promotion, the student whose grades improve, the foreigner who learns a new language -- all these are examples of people who have measurable results to show for their efforts.

By contrast, the process of personal growth is much more difficult to determine, since by definition it is a journey and not the specific signposts or landmarks along the way. The process is not the road itself, but rather the attitudes and feelings people have, their caution or courage, as they encounter new experiences and unexpected obstacles. In this process, the journey never really ends; there are always new ways to experience the world, new ideas to try, new challenges to accept.

In order to grow, to travel new roads, people need to have a willingness to take risks, to confront the unknown, and to accept the possibility that they may “fail” at first. How we see ourselves as we try a new way of being is essential to our ability to grow. Do we perceive ourselves as quick and curious? If so, then we tend to take more chances and to be more open to unfamiliar experiences. Do we think we’re shy and indecisive? Then our sense of timidity can cause us to hesitate, to move slowly, and not to take a step until we know the ground is safe. Do we think we’re slow to adapt to change or that we’re not smart enough to cope with a new challenge? Then we are likely to take a more passive role or not try at all.

These feelings of insecurity and self-doubt are both unavoidable and necessary if we are to change and grow. If we do not confront and overcome these internal fears and doubts, if we protect ourselves too much, then we cease to grow. We become trapped inside a shell of our own making.

1. A person is generally believed to achieve personal growth when _____.

A．he has abandoned the habit of idleness

B．he has made great efforts in his work

C．he is keen on learning anything new

D．he has tried to determine where he is on his urgent journey

2. In the author's eyes, one who views personal growth as a process would _____.

A．succeed in getting a high position in society

B．judge his ability to grow from his own achievements

C．face difficulties and take up challenges

D．aim high and reach his goal each time

3. When the author says" a new way of being " in the third paragraph, he is referring to _____.

A．a new approach to experiencing the world

B．a new way of taking risks

C．a new method of holding our ground

D．a new attitude towards our failure

4. For personal growth, the author approves of all the following EXCEPT _____.

A．curiosity about more chances

B．quick adaptation to new conditions

C．open-mindedness to new experiences

D．avoidance of internal fears and doubts

【推荐2】A newly discovered lizard (蜥蜴) found in the Philippines has made scientists think there might be other never-before-seen creatures on that country’s islands. But scientists say those creatures might never be found because the islands’ rain forests are in danger.

The latest lizard was first spotted in 2001 when scientists saw local people of the island catch it for food. Scientists took some pictures of the lizard. Finally scientists caught a lizard themselves to study. They named the new lizard the Northern Sierra Madre forest monitor because it was discovered in the islands’ Sierra Madre Mountains. The 6.6-foot-long lizard has bright yellow markings that distinguish (区分) it from more boring-looking monitors. Its legs are mainly yellow, and its tail is black and yellow.

So how could scientists work in the Philippines’ rain forests for years without finding the new lizard? They say the Northern Sierra Madre forest monitor is unlike other lizards and their larger cousin, the Komodo dragon. All of those lizards are meat-eaters. But the new-found lizard eats fruit. That means it never has to come down out of the trees. Its uniquely colored skin, quiet manner, and treetop home helped it remain hidden from scientists’ view for many years.

The discovery of the Northern Sierra Madre forest monitor is making scientists realize that Philippines’ rain forests may hold many undiscovered species. But those species will not be found if the rain forests keep disappearing. Twenty years ago, forests covered about 35 percent of the Philippines’ land. But people have been encroaching on that land and building on it. Today, forests cover less than 25 percent of the country’s land.

The rain forests are a “conservation (保护) hot spot” that need to be protected, scientists say. “I hope we can make the new lizard a ‘poster child’ for conservation of the land,” said one scientist.

1. What is the scientists’ attitude to finding more new creatures in Philippines’ rain forests?

A．Interested.	B．Doubtful.
C．Excited.	D．Supportive.

2. How did scientists discover the new lizard?

A．They caught one with the help of locals.

B．The locals gave one to scientists as a gift.

C．They found it from pictures taken by locals.

D．They noticed it when locals hunted the lizard.

3. What is special about the new-found lizard according to Paragragh 3?

A．It is a cruel meat-eater.	B．It is the largest lizard in Asia.
C．It spends most time in trees.	D．It looks like Komodo dragon.

4. What does the underlined phrase “encroaching on” mean?

A．Invading.(侵略)	B．Protecting.
C．Maintaining.	D．Deserting.

【推荐3】Researchers have found, for the first time plants letting out sounds when they are stressed. According to a study a team of scientists recorded tomato and tobacco (烟草) plants producing sound frequencies which humans cannot hear in stressful situations—such as when they experienced a lack of water or their stems (茎) were cut.

Previous research has shown that plants respond to stress by producing several visual and chemical signals. For example, stressed plants may differ in color and shape compared to unstressed plants. Meanwhile, some are also known to let out things in response to drought (干旱) or being eaten.

The latest study, meanwhile, is the first to identify plants making sounds which can be detected over a distance. The team detected the tomato plants made 35 sounds an hour on average when they were exposed to drought conditions, while the tobacco plants produced 11. When the stems of the plants were cut, the tomato plants made 25 sounds an hour on average and the tobacco plants produced 15. As a comparison, unstressed plants made less than one sound per hour on average, according to the study.

The team say that while they only tested tomato and tobacco, it’s possible that other plants could also produce sounds, adding that the latest findings could have an influence on agriculture. “Plant sound production could offer a new way for monitoring crops water state—a question of key importance in agriculture”, the authors wrote in the study more precise irrigation can save up to 50 percent of the water cost and increase the production.

“In times when more and more areas are exposed to drought due to climate change, while human population and consumption keep increasing, effective water use becomes even more important for food security”, they said “Our results, showing the ability to distinguish between drought-stressed and control plants on the basis of plant sounds, open a new direction in the field of precision agriculture.”

1. Which of the following best describes plants’ response to stress in the study?

A．Sing.	B．Laugh.
C．Cry.	D．Sigh.

2. What can we know from the first 3 paragraphs?

A．Humans can hear the sound produced by plants.

B．Stressed and unstressed plants look the same.

C．Plants in stressful situations make the fewest sounds.

D．Stressed tomato plants make more sounds than tobacco.

3. How can the study help agriculture?

A．Lower the cost.	B．Better the quality.
C．Monitor climate change.	D．Control the pests.

4. In which section of a newspaper may this text appear?

A．Science.	B．Health.
C．Education.	D．Culture.