1 . Amid rolling farms and green pasture 150 miles northwest of Sao Paulo, Brazil, two tropical forests bloom as one. The first consists of a single species, row after row of non-native eucalyptus (桉树), planted in perfect lines like carrots. The other is haphazard, an assortment of dozens of varieties of native saplings.
There’s no denying it: This forest looks ridiculous. The gangly (修长的) eucalyptuses shoot like witch fingers high above patches of stubby fig (矮壮的无花果树) and evergreen trees. Yet these jumbled 2.5-acre stands of native trees, ringed by fast-growing exotics, are among many promising efforts to resurrect the planet’s forests.
The eucalyptuses, says Pedro Brancalion, the University of Sao Paulo agronomist who designed this experiment, get big so quickly they can be cut after five years and sold to make paper or fence posts. That covers nearly half or more of the cost of planting the slow-growing native trees, which then naturally reseed ground that has been laid bare by the harvest. And this process doesn’t hamper natural regeneration.
You needn’t look far these days to find organizations trying to save the world by growing trees. Too often, tree-planting groups are so focused on getting credit for each seedling planted that they ignore what matters most: What kind of woodland is created? At what cost? And most importantly: How long will it last? Using the numbers of trees planted as a magic “proxy for everything,” Brancalion says, you “spend more money and get lower levels of benefits.” You can literally miss the forest for the trees.
Tree planting seems like a simple, natural way to counter the overwhelming crises of climate change and biodiversity loss. Trees provide wildlife habitats and slurp carbon dioxide from the atmosphere. No wonder trees are hailed as the ideal weapon. Yet for every high-profile planting operation, devastating failures have occurred. In Turkey, Sri Lanka, and Mexico, mass plantings have resulted in millions of dead seedlings or have driven farmers to clear more intact forest elsewhere. Trees that have been planted in the wrong places have reduced water yields for farmers, destroyed highly diverse carbon-sucking grassland soils, and allowed for invasive vegetation to spread. Simply reforesting the planet isn’t going to do much if we don’t also start cutting down on our emissions from the burning of coal, oil, and natural gas. Tree planting also can’t replace old-growth forests. Saving them is even more important than growing new forests.
So, what should we do?
To Brancalion, the answer is obvious: Restore native forests, mostly in the tropics, where trees grow fast and land is cheap. While that may require planting, it may also call for the clearing out of invasive grasses, the rejuvenation (使有活力) of soils, and crop yield improvements so that farmers will need less land for agriculture and more can be allowed to revert back to forests.
The combining of eucalyptus harvests with native plantings is just one more reminder that successful restoration must provide value to local communities. In many cases, if we let nature do the heavy lifting, Brancalion says, “the forest can regrow quite effectively.”
1. What can we learn from the first three paragraphs?| A．The non-native eucalyptuses bring profits that can pay for planting native saplings. |
| B．The non-native eucalyptuses compete with native saplings for water, nutrients, and light. |
| C．The variety of trees being planted determines whether or not the restoration will succeed. |
| D．Planting fast-growing exotics together with local trees does harm to the natural environment. |
| A．emphasize the significance of protecting existing forests |
| B．explain why tree planting is regarded as the ideal solution |
| C．illustrate the serious problems planting campaigns can cause |
| D．indicate the most important point tree-planting groups ignore |
| A．clear more forest to improve crop yields for farmers |
| B．combine harvests of fast-growing exotics with native plantings |
| C．restore native forests in the tropics and clear out invasive grasses |
| D．take into consideration the benefits of reforestation to local communities |
| A．Plant trees—and time will tell. | B．Plant trees—but don’t overdo it. |
| C．Plant trees—and save the world. | D．Plant trees—but mind the variety. |
2 . Working Together to Save the Sea Turtles
Florida has some of the best beaches in the world. Thousands of people visit the state to enjoy the sand. But these beaches are also home to five species of sea turtles. A major problem is facing these interesting creatures.
Some volunteers and researchers in Florida take direct action to help the turtles. They look closely at the sand to find the fin (鳍) marks the mother sea turtles left there.
These are not the only Floridians taking action to help protect these creatures. Florida’s government has passed laws to save the turtles. One of these laws is “Florida’s Marine Turtle Protection Act”. This law prohibits anyone from disturbing or destroying marine turtles, nests, or eggs.
Another way Floridians work together to save these creatures is through organizations like the Sea Turtle Conservancy. The Sea Turtle Conservancy helps people take steps that will help reduce the threats that put sea turtles in danger. For instance, bright lights on buildings near the beach can negatively impact sea turtles. Baby sea turtles usually hatch on the sandy beach and head to the ocean. When there are bright lights coming from the other side of the shore far from the ocean, the baby turtles get confused.
| A．Many of them do not make it to the ocean and die. |
| B．Some of these turtle species are in danger of going extinct. |
| C．This helps them to locate where the sea turtles laid their eggs. |
| D．It also helps make sure that sea turtles’ natural habitats are protected. |
| E．Female sea turtles come from the ocean and onto these beaches at night. |
| F．They use their fins to move back across the beach and return to the ocean. |
| G．Every Floridian can do their part to protect sea turtles and their environment. |
3 . Anuar Abdullah has always had a special feeling for the ocean. In the 1980s, he settled in Perhentian as a diving instructor and fell in love with corals. Twice daily, he went out to sea, staying underwater for as long as his oxygen supply allowed. He learned the shapes and textures (纹理) of coral reefs long before he knew their Latin names. He studied the living conditions—the water temperature, the sunshine, the diversity(多样性) of ocean life—and saw how just one of those factors could bring about large-scale death.
Abdullah spent two decades experimenting with how to grow coral reefs in the ocean. He didn’t have a degree in marine (海洋的) biology or a research lab, but he had his own ways. Almost all the materials he used to grow corals came directly from the ocean. He didn’t use steel pipes or bricks—which he couldn’t afford—instead, he gathered rocks from the seafloor, piling them so they wouldn’t be knocked down by tidal waves. While others might depend on a lab to break live coral into pieces that were in turn used for growing, he searched for broken pieces of coral in existing reefs and fixed them to the rocks using animal-friendly glue. When he needed other materials, he started by searching the beach for waste.
Every day, the locals saw him on his knees examining corals in the ocean. Sometimes, he picked up a rock to which he had fixed a piece of coral several weeks earlier, and said very quietly, “My little acropora (鹿角大珊瑚), how are you doing today?” The locals whispered about how he’d spent days in the water speaking to corals as if they were people. “Everyone thought I was stupid,” said Abdullah, “But I knew I was doing the most important thing in the world.”
Actually, Abdullah was right. Now, in a world rapidly losing its coral reefs to climate change and environmental damage, he has become an increasingly influential expert on how to bring them back to life. Thousands have traveled from around the world to learn from Abdullah how to grow corals, with some eventually leaving their jobs to join his projects full time. With his 700 active volunteers, he has already saved about 125 acres of coral reefs.
1. Abdullah went out to sea twice daily to ________.| A．study coral reefs | B．have diving training |
| C．check his oxygen supply | D．share his feelings for the sea |
| A．eco-friendly and practical | B．traditional and indirect |
| C．high-tech and affordable | D．scientific and expensive |
| A．searched for waste to make a living | B．received a degree in marine biology |
| C．talked to everyone about coral reefs | D．became an expert on coral protection |
| A．Anyone with a dream is amazing. | B．Achievement provides true pleasure. |
| C．An individual can make a difference. | D．The strong man is strongest when alone. |
4 . Episodic memory (情景记忆) allows humans to revisit past personal experiences in their minds, and it was once thought to be a special skill of humans. Although there are still arguments about the extent of this type of memory in non-human animals, scientists have proved that creatures like rats and dogs can pass tests that are developed to assess episodic memory over the past two decades. “Curiously, there is a lack of research investigating dolphins’ episodic memory,” University of Cambridge cognitive (认知的) scientist James Davies says. Therefore, this surprising fact encourages him to fill this gap.
The team used “where” and “who” questions in their research, each on a different test. Each dolphin was first trained to retrieve a ball from the water, and then trained to get a ball by approaching a person holding it in front of them while ignoring an empty-handed person standing at a different spot. During this training, the locations were randomized (使随机化) and the person holding the ball differed each time, so that those details were irrelevant to learning the retrieving behavior. Then, for the tests, the dolphins were asked to retrieve the ball as they had learned to do, but after 10 minutes, something changed-this time, the ball couldn’t be seen, as it was now behind one of the two people’s backs. In the “where” tests, the ball was hidden in the same spot as in the training, but both people had been changed, while in the “who” tests, the locations of the people changed but the ball remained with the person who’d had it previously.
Eight dolphins went through each of the two tests, separated by at least 48 hours. All the dolphins got it right in choosing the correct spot on the “where” experiments, and seven achieved success on the “who” experiments.
Kelly Jaakkola, a psychologist, says that based on their cognitive skills, dolphins are a good candidate for having episodic-like memory, and this study goes really far in showing that. She also says, “The more we look for such capabilities in non-human animals, the more species we’ll likely find them in.” She adds, “An exciting question is therefore ‘Where do we draw that line? Which animals do have it, which animals don’t, and what sort of cognitive or neurological or social characteristics do those animals share? ’ That’s going to be the fun part of the game.”
1. What does the underlined word “retrieve” in Paragraph 2 probably mean?| A．Fetch. | B．Move. | C．Throw. | D．Play. |
| A．The locations of the people involved in the tests. |
| B．The memory tasks that dolphins need to perform. |
| C．The ability of dolphins to communicate with humans. |
| D．The dolphins’ characteristics related to their memory processing. |
| A．Dolphins pass the tests as a result of training. |
| B．It is very likely that dolphins are affected by people during the tests. |
| C．Scientists will probably find episodic memory in all non-human animals. |
| D．The influence of dolphins’ familiarity with a location or a person is avoided. |
| A．Dolphins Are the Most Intelligent Animals |
| B．Dolphins May Remember Personal Experiences |
| C．Episodic Memory Is Important for Humans and Animals |
| D．A Scientific Method Is Used to Study Dolphins’ Memory |
5 . Laughing together is an important way for people to connect and bond. And though the causes of laughter can vary widely across individuals and groups, the sound of a laugh is usually recognizable between people belonging to different cultures.
But what about animals? Do they “laugh”? And are the causes of animal and human laughter alike? In humans, people may laugh when they hear a joke, or when they see something that they think is funny, though it’s unknown if animals’ intelligence includes what humans would call a sense of humor.
However, many animals produce sounds during play that are unique to that pleasant social interaction. Researchers consider such vocalizations to be similar to human laughter. Recently, scientists investigated play vocalization to see how common it was among animals. The team identified 65 species that “laughed” while playing — most were mammals (哺乳动物), but a few bird species demonstrated playful laughter too. Reports of playful laughter were notably absent in studies describing fish, perhaps because there is some question as to whether or not play exists at all in that animal group. This new study could help scientists to analyze the origins of human laughter.
But how can we identify play? Unlike fighting, play is usually repetitive and happens independently of other social behaviors, said lead study author Sasha Winkler, a doctor of biological anthropology at the University of California. When it comes to identifying it, “you know it when you see it,” Winkler told Live Science. One sign is that primates — our closest relatives — have a “play face” that is similar to the expressions of humans who are playing.
When Winkler previously worked with rhesus macaques, she had noticed that the monkeys panted (喘气) quietly while playing. Many other primates are also known to vocalize during play, she said, so a hypothesis (laughter in humans is thought to have originated during play) supported by the play-related panting laughter of many primate species was put forward.
People now still laugh during play, but we also integrate laughter into language and non-play behaviors, using laughter in diverse ways to express a range of emotions that may be positive or negative. Human laughter notably differs from other animals’ laughter in another important way: its volume. People broadcast their laughter loudly, often as a way of establishing inclusion. By comparison, when most animals laugh, the sound is very quiet — just loud enough to be heard by the laugher’s partner.
“It’s really fascinating that so many animals have a similar function of vocalization during play,” Winkler told Live Science. “But we do have these unique parts of human laughter that are also an important area for future study."
1. What is the main purpose of the passage?| A．To explain causes of animal and human laughter. |
| B．To assess complexities regarding animal laughter. |
| C．To present findings on the existence of animal laughter. |
| D．To analyze differences between animal and human laughter. |
| A．Animal laughter is even noticeable in fish. |
| B．Animal laughter is hard to recognize during play. |
| C．People have learned to combine play with laughter. |
| D．People laugh loudly because they want to involve others. |
| A．Distinctive features of human laughter. |
| B．Different functions of animal laughter. |
| C．The origin and development of human laughter. |
| D．The relationship between animal laughter and intelligence. |
6 . As a shift in the polar vortex (极地涡旋) swept across much of the US, many people in the country were hit with a sudden snap of cold. Heavy ice and snow coupled with fallen trees caused the outages in major cities, with companies unable to tell their customers when power will be restored.
Polar vortices were noticed long ago. But the first known use of the term “polar vortex” was in a magazine in 1853. Polar vortices are present year-round, but we don’t hear about them until they cause problems. They maintain freezing temperatures at the North and South poles by moving in tight counter-clockwise patterns. Polar vortices grow stronger in winter and weaken in summer. They are kept in place at the poles by another atmospheric current called the jet stream. However, when the jet streams weaken, the cold winds of the polar vortex are pushed southwards and it is during this time that people begin to pay attention!
In Texas, roads froze over, causing six traffic deaths, and many schools were shut-down. People are not the only Earthlings to struggle with the cold. Crops and animals are also freezing. This could have major consequences, especially if herds of cattle die. If snow blocks cattle, the animals can’t reach basic necessities like food and fresh water.
On a brighter note, some Texas cities were more prepared than others. For instance, Amarillo, which is located in North Texas, so they are more accustomed to colder temperatures. Amarillo is notable because the city was redesigned to stand up to severe winter storms. Officials have spread out fire stations to increase coverage of first responders, employed modified dump trucks for clearing ice, and upgraded civic centers to provide shelter during storms. Hopefully, other Texas cities will follow the good example set by Amarillo!
1. What does the underlined word “outages” refer to?| A．Traffic jams. | B．Power struggles. |
| C．Power cuts. | D．Traffic accidents. |
| A．They grow stronger in summer. | B．They are affected by jet streams. |
| C．They were first observed in 1853. | D．They move in a clockwise direction. |
| A．The definition of the polar vortex. | B．The characteristics of the polar vortex. |
| C．The ways to deal with the polar vortex. | D．The serious impact made by the polar vortex. |
| A．Because it is located in the north of Texas. |
| B．Because it has been upgraded and modernized. |
| C．Because it has been regarded as an example to other cities. |
| D．Because it has taken effective measures to resist winter storms. |
7 . Ocean heat waves — defined as periods of extreme temperatures lasting five days or more — have become increasingly common in recent decades. In fact, as a new study published in Nature Climate Change finds, Earth’s number of annual ocean heat wave days increased by around 54 percent between 1987 and 2016, with abnormally high temperatures not only occurring more frequently, but also lasting for longer periods of time.
Underwater heat waves pose a significant threat to marine ecosystems, which are already at risk due to issues including overfishing and widespread plastic pollution. Sweeping through oceans much like wildfires blaze through forests on land, extreme temperatures exact damage on foundational organisms such as kelp forests, seagrass meadows and coral reefs. Given that these framework species provide shelter and food to many other ocean creatures, the study’s authors warn that such destruction will likely have cascading consequences for marine biodiversity.
To assess the effects of ocean heat waves, researchers led by ecologist Daniel Smale of Great Britain’s Marine Biological Association turned to 116 previously published academic studies. Reflecting on more than 1,000 ecological records and eight specific heat waves, the scientists identified regions and species that were the weakest to temperature increases. As Mary Papenfuss writes for the Huffington Post, areas of the Pacific, Atlantic and Indian Oceans topped the list, with the Caribbean’s coral reefs, Australia’s seagrass and California’s kelp forests causing particular concerns.
In terms of species, Pacific Standard’s Kate Wheeling adds, the team notes that immobile plants and animals were the hardest hit, while tropical fish and mobile invertebrates (无脊椎生物) were able to cope with the heat by moving to different habitats. Interestingly, John Timmer reports for Ars Technica, the researchers actually observed heightened levels of fish diversity during periods of above- average temperatures, likely due to the animals’ mass migration (迁徙) toward friendlier waters. The same trend did not prove true for sea-dwelling birds, however, as shifting habitats limited the avian creatures’ access to prey.
Although the researchers’ findings are most consequential for marine ecosystems. Pierre-Louis and Popovich explain that damage to ocean habitats will also affect humans who rely on fishing and fish farming.
“Certainly there’s going to be changes with climate change to marine communities, but it’s not like the oceans are going to become the dead sea. It’s just that, as a consequence of what we’re doing to the oceans, there’s going to be different marine communities in different places than what we’re used to. Obviously, that is a problem because we’re sort of set up for what the climate is now rather than what it is going to be in the future.”
1. “Species” in “these framework species” in Paragraph 2 refers to ________.| A．wildfires | B．damages | C．organisms | D．temperatures |
| A．The temperatures of wave heats nearly doubled in 2016. |
| B．Living creatures can avoid heat wave damage by migration. |
| C．Overfishing and plastic pollution are the main causes to ocean heat. |
| D．The weakest regions are concluded from previous academic studies. |
| A．People should stop fishing because of the climate change. |
| B．People who take fishing for a living might earn lower profits. |
| C．The researchers findings cannot help us protect the land ecosystems. |
| D．Changes to ocean habitats would bring extremely bad results to the sea. |
| A．Ocean Heat Waves Are Affecting Us |
| B．Ocean Heat Waves Are Getting Worse |
| C．Ocean Heat Waves Are Threatening Marine Life |
| D．Ocean Heat Waves Are keys to Marine Biodiversity |
8 . Buck’s first day on the beach was a nightmare. Every hour was filled with shock or surprise. He had been suddenly removed from civilization and thrown into the heart of a primitive world. Here there was neither peace nor rest, nor a moment’s safety. It was essential to be constantly alert, for these dogs and men were not town dogs and men. They were savages, all of them, who knew no law but the law of Club and Tooth.
Buck had never seen dogs fight like these, and his first experience taught him an unforgettable lesson. He was fortunate that it was Curly who was the victim, not himself. Curly, in her friendly way, tried to make friends with a husky dog. The dog was the size of a full-grown wolf, but not half as large as Curly was. There was no warning: only a fast jump, a metallic cut of teeth, and a jump back. Curly’s face was ripped open from eye to mouth.
It was wolf fighting, to strike and jump away, but there was more to it than this. Thirty or forty huskies ran to watch. They surrounded the fighters in a silent, watching circle, all licking their lips. Curly rushed at the husky, who struck again and jumped away. He met her next rush with his chest in a strange way that knocked her over. She never got up again. This was what the watching huskies had waited for. They closed in on her, snarling and yelping. Curly was buried, screaming in pain, under the dogs’ bodies.
1. Why did Buck have to be ‘constantly alert’?| A．He couldn’t fall asleep | B．He was worried about Curly |
| C．He had to make sure he was always safe | D．He was in a lot of pain |
| A．You must have a tooth and club in the wild | B．The strongest make the rules |
| C．The weakest must survive in the wild | D．The tooth must fight the club |
| A．Run at the enemy non-stop | B．First to strike wins |
| C．Attack and step back | D．Wolves only use their paws to fight |
| A．Dogs will always fight other dogs for food |
| B．Buck wanted to help Curly, but he was afraid of the huskies |
| C．The only way dogs can survive is by eating other dogs |
| D．Only the strongest shall survive in the wild |
9 . The environmental practices of big businesses are shaped by a fundamental fact that offends our sense of justice. A business may maximize the amount of money it makes by damaging the environment and hurting people. When government regulation is effective, and the public is environmentally aware, environmentally clean big businesses may out-compete dirty ones, but the reverse is likely to be true if government regulation is ineffective and the public doesn’t care.
It is easy to blame a business for helping itself by hurting other people. But blaming alone is unlikely to produce change. It ignores the fact that businesses are not charities but profit-making companies, and they are under obligation to maximize profits for shareholders by legal means.
Our blaming of businesses also ignores the ultimate responsibility of the public for creating the conditions that let a business profit through destructive environmental policies. In the long run, it is the public, either directly or through its politicians, that has the power to make such destructive policies unprofitable and illegal, and to make sustainable environmental policies profitable.
The public can do that by accusing businesses of harming them. The public may also make their opinion felt by choosing to buy sustainably harvested products; by preferring their governments to award valuable contracts to businesses with a good environmental track record; and by pressing their governments to pass and enforce laws and regulations requiring good environmental practices.
In turn, big businesses can exert powerful pressure on any suppliers that might ignore public or government pressure. For instance, after the US public became concerned about the spread of a disease, transmitted to humans through infected meat, the US government introduced rules demanding that the meat industry abandon practices associated with the risk of the disease spreading. But the meat packers refused to follow these, claiming that they would be too expensive to obey. However, when a fast-food company made the same demands after customer purchases of its hamburgers dropped, the meat industry followed immediately. The public’s task is therefore to identify which links in the supply chain are sensitive to public pressure.
Some readers may be disappointed or outraged that I place the ultimate responsibility for business practices harming the public on the public itself. I also believe that the public must accept the necessity for higher prices for products to cover the added costs of sound environmental practices. My views may seem to ignore the belief that businesses should act in accordance with moral principles even if this leads to a reduction in their profits. But I think we have to recognize that, throughout human history, government regulation has arisen precisely because it was found that not only did moral principles need to be made explicit, they also needed to be enforced.
My conclusion is not a moralistic one about who is right or wrong, admirable or selfish. I believe that changes in public attitudes are essential for changes in businesses’ environmental practices.
1. The main idea of Paragraph 3 is that environmental damage__________.| A．is the result of ignorance of the public |
| B．requires political action if it is to be stopped |
| C．can be prevented by the action of ordinary people |
| D．can only be stopped by educating business leaders |
| A．reduce their own individual impact on the environment |
| B．learn more about the impact of business on the environment |
| C．raise awareness of the effects of specific environmental disasters |
| D．influence the environmental policies of businesses and governments |
| A．Meat packers stopped supplying hamburgers to fast-food chains. |
| B．Meat packers persuaded the government to reduce their expenses. |
| C．A fast-food company forced their meat suppliers to follow the law. |
| D．A fast-food company encouraged the government to introduce regulations. |
| A．Will the world survive the threat caused by big businesses? |
| B．How can big businesses be encouraged to be less driven by profit? |
| C．What environmental dangers are caused by the greed of businesses? |
| D．Are big businesses to blame for the damage they cause to the environment? |
10 . Dog adoptions, and sales of supplies like dog food and dog toys, soared during Covid-19. For a lot of people, knowing they’d be working from home for months made the idea of adopting a dog much more attractive.
Research dog food
People or pets, feeding someone is a great way to not only show love, but to feel love. Anyone who has invested time in creating a great meal for their family knows that the experience of cooking helps them feel closer to the people eating.
Work with a trainer
Sometimes loving a specific dog is about getting into dogs in general. Reading dog stories, looking at dog pictures, watching dog shows and videos can all make you feel more loving towards dogs in general, which will in turn help you feel better about your own dog. Instagram is an easy way to get your cute dog fix!
Give it time
We all love the stories about the person who walks into a shelter and falls in love with a dog. But, just like with people, it’s not always love at first site. Sometimes, we think that if we don’t love a dog right away, it’s a problem
| A．Play with your dog |
| B．Read about other dogs |
| C．If you’re having trouble connecting with your new dog |
| D．In reality, some relationships just take more time to build |
| E．When you find your friendship needs more time to develop |
| F．You could make your own dog food, but most people don’t |
| G．Sometimes we have trouble bonding with a dog because we don’t understand that dog |
