1 . Plastic is everywhere, from the Arctic ice to vital organs in the human body. In fact, previous estimates suggest that the average person swallows a credit card-worth of microscopic plastic particles(颗粒) every week. But new research shows that this could actually be an understatement.
Microplastics are plastics smaller than 5 millimeters, found in industrial waste, beauty products, and formed during the degradation of larger plastic pieces. Over time, they break down into even smaller nanoplastics. These tiny particles can pass through our intestines and lungs into our bloodstreams, reaching vital organs like the heart and brain.
While the idea of eating plastic is unsettling in itself, the major concern here is that these plastic particles contain chemicals that can interrupt our body’s natural release of hormones, potentially increasing our risk of reproductive disorders and certain cancers. They can also carry toxins(毒素) on their surface like heavy metals.
In the past, researchers have shown bottled water can contain tens of thousands of identifiable plastic fragments in a single container. However, until recently, only the larger microplastics were detectable with available measuring tools, leaving the area of nanoplastics largely a mystery.
Using Raman microscopy (显微镜学), capable of detecting particles down to the size of a flu virus, the team measured an average of 240, 000 particles of plastic per liter of bottled water, 90 percent of which were nanoplastics, a revelation 10 to 100 times larger than previous estimates.
These plastics likely originate from the bottle material, filters used to “purify” the water, and the source water itself. “It is not totally unexpected to find so much of this stuff, ” the study’s lead author, Columbia graduate student Naixin Qian, said in a statement. His team hopes to expand their research into tap water and other water sources to better inform our exposure to these potentially dangerous particles. “The idea is that the smaller things get, the more of them I reveal, ” he added.
1. What is the primary focus of the new research?| A．The presence of plastic particles. | B．The use of plastic in everyday products. |
| C．The detection methods for microplastics. | D．The potential risks of nanoplastics to human. |
| A．Finding the source of plastic particles. | B．Helping to cure the deadly flu virus. |
| C．Detecting the smaller plastic particles. | D．Improving the quality of bottled water. |
| A．To focus on areas with higher plastic pollution. |
| B．To be aware of the dangerous particles in daily life. |
| C．To further measure the types of particles in tap water. |
| D．To detect the smaller plastic particles in industrial areas. |
| A．Skeptical. | B．Objective. | C．Conservative. | D．Positive. |
2 . All over the world, animals and plants are in trouble. People are trying their best to help them.
Donate some money.
Many zoos and wildlife organizations have programs that let kids donate money to help a specific endangered animal.
Don’t release fish or pets onto the wild.
Chemicals used to kill garden weeds and bugs are a big problem for animals. Maybe if you offered to pull up the weeds instead, you could help people to use fewer poisons.
Speak up!
Share what you know and speak up for the animals. Write letters! Powerful people need to know that you care and that you’re keeping an eye on them to make sure they do their jobs right and protect the planet.
Make less trash.
Pollution and plastic trash are bad for animals and nature. How can you help?
Bring drinks from home in a refillable bottle.
| A．Pull weeds. |
| B．People have no choice but to worry. |
| C．It might seem kind to set pets free, but it isn’t. |
| D．Take your lunch in a lunchbox or reusable bag. |
| E．Pulling weeds is a chore — but you said you want to help! |
| F．Here are some useful ways to help plants and animals in our daily life. |
| G．For your next birthday, why don’t you donate your pocket money? |
3 . In habitats across the planet, animals periodically drop everything to walk, fly or swim to a new place. Wildlife such as whales and geese learn migration paths by following their parents. Others, including small songbirds, gain the distance and direction of their migration within their genetic code. And some animals use a combination of genetics and culture to guide their migration.
Another group of migrators does not quite fit either model, and researchers have only recently started to figure out how they find their way. Take the Cory’s shearwater, an oceangoing sea bird that migrates over the Atlantic every year. The young do not migrate with their parents, so culture cannot explain their journeys. And the exact paths vary wildly from individual to individual, making genetics equally unlikely.
Cory’s shearwaters are long-lived, rarely producing young successfully before age nine. This leaves an opening for learning and practice to develop their migration patterns. Researchers call this the “exploration-refinement”, and until now it has been hypothetical (假设的) because of difficulties in tracking migratory animals’ movements.
But a team of researchers has done that by attaching small geolocators to more than 150 of the birds aged four to nine. They found that younger birds traveled longer distances, for longer periods, and had more diverse paths than older birds. “We finally have evidence of the ‘exploration-refinement’ for migratory birds,” says Letizia Campioni, who led the study. Younger Cory’s shearwaters are able to fly just as fast as the adults—but they do not, suggesting that the young do more exploring, which gradually fades as they mature and settle into a preferred course.
Although it may seem less efficient than other strategies, “exploration refinement could be beneficial to birds and other organisms in a rapidly changing world due to unpredictable man-made changes,” says Barbara Frei. “It might be safer to repeat a behavior that was recently successful than to rely on patterns that were perfected long ago but might no longer be safe.”
1. Why does the author mention different migration models in Paragraph 1?| A．To give an example. | B．To lead in the topic. |
| C．To make a comparison. | D．To support an idea. |
| A．The opening for learning and practice. |
| B．The unique living habit of Cory’s shearwaters. |
| C．The way Cory’s shearwaters form their migration patterns. |
| D．The process scientists track Cory’s shearwaters’ movements. |
| A．They lower the speed for exploration. | B．They move in a predictable manner. |
| C．They travel as much as adult birds. | D．They look for a course with their parents. |
| A．Fixed Tracks: Safer Migration Model |
| B．Migration Models: Important Ways to Deal With Changes |
| C．A Combination of Strategies: A Wise Choice for Migration |
| D．Exploration Refinement: Migration Model With Better Adaptability |
4 . The science of why insects gather around lights at night has never been nailed down. Popular theories propose that moths and other insects navigate (导航) by the moon and mistake lamps for moonlight, or that the insects fly towards light to escape coming danger. Now researchers believe they have a more convincing answer: contrary to current theories, insects are not attracted to light from far away, but become trapped if they fly close to an artificial light source.
According to Dr Sam Fabian, study co-author and Imperial College London entomologist, moths and many other insects that fly at night evolved to tilt (倾斜) their backs to wherever is brightest. For hundreds of millions of years, this was the sky rather than the ground. The trick told insects which way was up and ensured they flew level. But then came artificial lighting. Moths found themselves tilting their backs to street lamps. This caused them to circle around the lamps endlessly, the insects trapped by their evolution.
Fabian and his colleagues filmed insect flight paths around lights in the lab. The videos reveal that time and again, moths and dragonflies turned their backs to artificial lights, which appeared to greatly change their flight paths. If the light is above them, they might start orbiting it, but if it’s behind them, they start tilting backwards and end up flying in circles or diving toward the ground.
Researchers have long warned that light pollution is a big driving force in the dramatic decline in insect populations. Moths and other insects that become trapped around lamps become easily caught by bats. The artificial lighting can also fool them into thinking it is daytime, causing them to bed down and skip a night’s feeding.
There are, Fabian believes, helpful lessons from the research. “What this tells us is that the direction of artificial light matters. Could we change lighting environments to not trap insects? For we’re facing a massive decline in insects around the world, and artificial light at night is one of the factors that could potentially be leading to this decline,” Fabian said.
1. What do the underlined words “nailed down” in paragraph 1 mean?| A．Popularized widely. | B．Discussed openly. |
| C．Defined accurately. | D．Explored academically. |
| A．they can’t keep their balance. |
| B．they use improper flight attitude. |
| C．they lose track of which way is up. |
| D．they are attracted to lights from far away. |
| A．It may lead to better conservation of insects. |
| B．Natural enemies of insects will be got rid of. |
| C．Artificial lighting will be greatly reduced at night. |
| D．It may raise concerns for insects’ eating behavior. |
| A．Why insects lose their ability to fly at night. |
| B．Why artificial light and evolution trap insects. |
| C．How artificial light impacts insect populations. |
| D．How insects evolved distinct strategies of flight. |
5 . In mainland Britain, people who has ever attempted to grow berries or nuts — or indeed feed the bird — will know, doing so is identical to an opening move in a game of chess with local grey squirrels, a game the squirrels tend to win. Grey squirrels are also fond of the occasional bird’s eggs or the young birds, and enjoy tearing and eating the bark of young broadleaf trees, which can either kill the trees or leave them open to infection. This, apart from affecting biodiversity and the landscape, harms the wood industry. The loss — in damaged timber, lost carbon revenue and tree replacements — is not insignificant: £37 a year in England and Wales.
Grey squirrels (Sciurus carolinensis), introduced from North America in 1876, have nearly replaced the native red squirrels (Sciurus vulgaris) in Britain by outcompeting them for food and habitat. They are larger, and stronger, and resistant to squirrel pox virus, while reds are not. About 3 million now live in the UK; the International Union for Conservation of Nature lists the grey squirrel among the top 100 most harmful invasive species in the world.
In Britain, significant efforts have been made to stop grey squirrels’ progress, including trapping, shooting, and releasing pine martens into their habitats. The latest move, a workable system for which was thought to be a decade away, is forbidding the breeding of grey squirrels. However, legal challenges brought so many delays that the invasive grey squirrels. population expanded to an unmanageable level and wiping out was abandoned. The main issue in Britain was thought to be more technological than legal — designing a drug that targets only grey squirrels to prevent them breeding. Another possibility in the years ahead is to use DNA editing to ensure grey females are born unable to give birth.
Obviously, there is a hint of xenophobia (仇外) in some discussions about the introduction of grey squirrels to Britain nearly 150 years ago which has had an impact on the local ecosystem, posing a threat to native species. It’s also worth noting that reds — which also tear bark and take eggs — were seen as pests until the early 1930s, and extensively killed. There is, too, a strong argument that ecosystems evolve naturally, and it may be impractical and unrealistic to intervenes or even resist it. The attraction of controlling the breeding of the grey squirrels is that it is less inhumane, and aims for balance rather than uprooting.
1. What does the author focus on in paragraph one?| A．The harm of grey squirrels. |
| B．The cutting habits of grey squirrels. |
| C．The effect of grey squirrels on the wood industry. |
| D．The game between the British and grey squirrels. |
| A．Their huge number. | B．Their unique origins. |
| C．Their breeding ability. | D．Their physical qualities. |
| A．To offer more labour. | B．To invest more money. |
| C．To perfect the law. | D．To take advantage of technology. |
| A．Unclear. | B．Indifferent. | C．Favorable. | D．Doubtful. |
6 . Several security guards of residential compounds in Beijing and workers were seen shoveling snow and some parked vehicles were covered by thick overnight snow. The first snowfall of winter arrived in Beijing early Monday, covering the Chinese capital with a mantle (披风) of white overnight and plunging (使……下降) the city into freezing temperatures, with even colder weather coming this week in northern China.
Snowfall reached 5.8 mm on average by early Monday, with the highest snowfall of 10.2 mm recorded in Fangshan district, Beijing Meteorological (气象的) Service data showed. Beijing typically sees its first snow of the season between late November and February, or even none at all. More snowfall is expected this week, with temperatures seen further sliding to as low as -20°Celsius. The Chinese capital last saw such similarly extremely cold weather on Jan. 7, 2021, when the temperature dropped to -19.6℃.
The cold snap (寒潮) in Beijing this week, compared with the autumn-like conditions a week ago, mirrored the sharp swings in temperatures recently. In October, Beijing experienced one of its warmest Octobers in decades in a year of weather extremes.
On Monday, the government warned of road icing in large parts of the city of nearly 22 million, with authorities shutting some expressways or partially closing sections. By 10 a. m. local time, 62 out of a few hundred flights had been cancelled at the Beijing Capital Airport. Railway authorities enforced speed limits on lines connecting Beijing and Guangzhou in southern China, causing delays in some passenger trains. By 7 a. m. Monday, more than 180 bus routes in Beijing had been suspended.
The official Beijing Daily reported that vegetable stocks were enough, hitting this year’s highest daily market volume of 23,800 tons, as merchants stocked up (备货) ahead of time. Huang, a Beijing resident working in the internet sector, said the snow in Beijing came early. “Normally, it doesn’t snow until the Spring Festival,” Huang said, referring to the start of the Lunar New Year, which typically falls in January or February.
1. Which of the following is not used to show the seriousness of the snowfall in paragraph?| A．By listing out numbers. | B．By illustrating a viewpoint. |
| C．By citing data from the authority. | D．By making comparisons. |
| A．From hot summers to mild winters. |
| B．From dry conditions to heavy rainfall. |
| C．From autumn-like conditions to a sudden coldness. |
| D．From constant snow to unexpectedly warm temperatures. |
| A．introduced | B．obeyed | C．happened | D．improved |
| A．Organized community support groups. | B．Increased storage of essential supplies. |
| C．Created emergency shelters for the homeless. | D．Offered discounts and sales to boost business. |
7 . For the first time in about 100 years, a rare bird called the takahē is walking freely along the Lake Whakatipu Waimaori Valley in New Zealand after 18 captive birds were released into the wild. The area is also home to a Maori tribe called Ngai Tahu, which has spent years campaigning for the birds to return to their land. The Maori are New Zealand’s Indigenous people (first people known to live there), and they consider the takahē bird to be “taonga”, meaning a treasure.
Takahē are large, round, flightless birds with red legs, and they have lived in New Zealand since prehistoric times. Like many New Zealand birds, takahē evolved to be flightless because there were no mammals to compete with. When Europeans arrived in New Zealand, however, predators such as cats and ferrets were introduced and killed off many flightless birds. Takahē were declared extinct in 1898, but a small number of the birds were discovered in 1948 in a remote part of the Murchison Mountains.
Since then, conservationists have been trying to restore the takahē population in captivity. They gathered the bird’s eggs in order to keep the chicks safe from predators. The chicks were raised by volunteers, who fed them while wearing sockpuppets on their hands to imitate the parent birds. There are now about 500 takahē birds in captivity. Several pairs of adult birds have been released into the island’s sanctuaries and national parks. Experts will monitor them to see how they adapt to their new environment. If everything goes well, they hope to release seven more birds this month and 10 young birds next year.
Ta Tipene O’Regan, an elder of the Ngai Tahu tribe, helped to release the birds. He told The Guardian newspaper, ”There are few things more beautiful than to watch these large birds running back into lands where they haven’t walked for over a century. ”O’Regan said, “It’s an absolute joy. ”
1. As for Maori people, takahē are ______.| A．valuable | B．dangerous | C．adaptable | D．entertaining |
| A．Big bodies | B．Long time captivity. |
| C．Native people’s protection. | D．No competitors. |
| A．Eggs. | B．Predators. | C．Baby birds | D．Parent takahē. |
| A．Native Birds back in the Wild | B．A Big Joy of Maori Tribes |
| C．Rare Eggs Protected by Volunteers | D．Distinct Mammals in New Zealand |
8 . Growing up on a mountain farm in Tyrol, Fritz enjoyed watching how cows and horses interacted with each other more freely, once they’d been led out of the barn and into pasture. It was what he observed in his boyhood that took root in his pursuit of becoming a biologist. After he finished his study at university. Fritz landed work at Austria’s Konrad Lorenz Research Center, raising raven chicks by hand and teaching graylag geese how to open boxes as he pursued his PhD. Working this closely with free-living animals was exactly what he’d dreamed of as a boy.
In 1997, a zoo gave the research center its first northern bald ibis chicks (隐鹮) Nowhere near as teachable as geese—and not even close to super intelligent ravens—the ibises frustrated most of the scientists. But Fritz was fascinated. He devoted himself to taking care of them. After the ibises were first released back into the wild more than 20 years ago, Fritz learned that spending generations in zoo hadn’t reduced their drive to migrate (迁徙), though it did leave them geographically uninformed. In their search for “south”, some ended up in Russia. What the ibises needed, Fritz thought, was a guide.
Fritz decided he would teach the birds a new, safer migration route by guiding them himself in a tiny aircraft. And he was confident he could succeed in this daring, unconventional plan—because he had done it before. “Around that time, the movie ‘Fly Away Home’ was a huge hit with us biologists,” Fritz says. When he announced that he’d do the same with the ibises, he was initially laughed at. But Fritz didn’t give up. He modified an ultralight aircraft so it would travel at speeds slow enough for his winged students to keep up. He had been his young pupils’ only provider of food, love and hugs since they were just a few days old, and the ibises eagerly followed their teacher, who just happened to pilot a fairly noisy machine.
In 2004, three years after some initially bumpy (颠簸的) experiments, Fritz led the first batch of birds from Austria to Italy, and has since led 15 such migrations. Over that time, he has rewilded 277 young ibises, many of which then started to pass the route on to their own young.
1. What determined Fritz’s career choice?| A．Fritz’s childhood observation. | B．Fritz’s passion for biology. |
| C．Fritz’s growth environment. | D．Fritz’s interaction with animals. |
| A．They are easy to get lost in the migration. |
| B．They are lacking in the desire to migrate. |
| C．They are accustomed to the life in the zoo. |
| D．They are strikingly far from easy to teach. |
| A．The ibises were too awkward to find a new migration route. |
| B．The ibises needed a guide for lack of geographical knowledge. |
| C．Fritz wanted to prove that he could succeed in a daring plan. |
| D．Fritz wanted to recreate a touching scene of a popular movie. |
| A．sensitive but courageous. | B．innovative but demanding. |
| C．persistent and insightful. | D．enthusiastic and cooperative. |
9 . Flash droughts (突发性干旱) develop fast, and when they hit at the wrong time, they can ruin a region’s agriculture. They are also becoming increasingly common as the planet warms. In a study published in the journal Communication Earth &Environment, we found that the risk of flash droughts, which can develop in a few weeks, is on pace to rise in every major agricultural region around the world in the coming decades.
In North America and Europe, cropland that had a 32% annual chance of a flash drought a few years ago could have a greater chance of a flash drought by the final decades of this century. That result would put food production, energy, and water supplies under increasing pressure. The cost of ravage will also rise. A flash drought in the Dakotas and Montana in 2017 caused $2.6 billion in agricultural damage in America alone.
All droughts begin when rainfall stops. What’s interesting about flash droughts is how fast they reinforce themselves, with some help from the warming climate. When the weather is hot and dry, soil loses water rapidly. Dry air extracts moisture from the land, and rising temperature can increase this evaporative demand. The lack of rain during a flash drought can further contribute to the feedback processes. Under these conditions, crops and vegetation begin to die much more quickly than they do during typical long-term droughts.
In our study, we used climate models and data from the past 170 years to assess the drought risks ahead under three conditions for how quickly the world takes action to slow the pace of global warming. If greenhouse gas emissions (排放物) from vehicles, power plants, and other human sources continue at a high rate, we found that cropland in much of North America and Europe would have a 53% annual chance of flash droughts, respectively, by the final decades of this century. Globally, the largest projected increases in flash droughts would be in Europe and the Amazon. Slowing emissions can reduce the risk significantly, but we found flash droughts would still increase by about 6% worldwide under low-emission conditions.
1. Why is the flash drought a concern?| A．It often develops and strikes unexpectedly. | B．It does go hand in hand with rainfall. |
| C．It can be destructive to regional agriculture. | D．Its chance has increased dramatically. |
| A．Control. | B．Assessment. | C．Production. | D．Damage. |
| A．The constant rainfall. | B．The increasing food demand. |
| C．The warming planet. | D．The fast pace of modern life. |
| A．To cut down on carbon footprint. | B．To evaluate the risks regularly. |
| C．To study climate models and data. | D．To monitor weather condition. |
10 . Conservation organization Plantlife is urging people to put away their lawnmowers (除草机) for a month and let wild flowers grow instead, as part of its No Mow May project.
Leaving the grass uncut will create a habitat that will benefit bees and other insects, the organization says. Plantlife says lawns could be biodiversity hot-spots if left alone. It says those who participated in its campaign last year reported the growth of more than 250 plant species on their lawns. Among these were wild strawberry and wild garlic. There were also sightings of declining species like green-winged orchids.
One gardener who has been enjoying a more relaxed approach is Tom Jennings, 45, from Buckinghamshire. He says it’s a chance to reconnect with the natural world. “Those fascinated by neat gardens use not only lawnmowers but chemicals.” says Tom.
After letting his back garden grow out, Tom witnessed an explosion of wild flowers—important for pollinators (授粉者) such as bees. Tom says he’s been shocked at how quickly insects have returned to his back garden: an encouraging signal given the global decline of insect populations.
According to Colette Webb, 42, who lives in West Sussex, there are added benefits to letting nature gradually take its course in the garden. “It saves you a bit of time and arguments with the husband about getting the lawnmower out—something my husband hates doing,” she says. “There’s a part of me that thinks the garden is really messy, but when you sit there for some time a day and look at what’s it’s supporting, you realize it’s for the benefit of nature.”
But not everyone is on board with the idea, says David. One of his neighbours is pursuing their own re-wilding project in their own garden—but the other is yet to be convinced. “And my mother, who’s 81, still says it looks untidy,” he laughs.
1. What is the major goal of Plantlife’s No Mow May project?| A．Helping promote biodiversity. | B．Attracting more garden visitors. |
| C．Making their gardens look more natural. | D．Saving people’s trouble of mowing their gardens. |
| A．He is crazy about neat gardens. |
| B．He hates having to cut the grass regularly. |
| C．He believes the project is increasing the number of insects. |
| D．He benefited a lot from the decline of insects in his garden. |
| A．She gets on better with her husband. | B．Her husband has come to enjoy gardening. |
| C．Her garden is no longer as messy as it used to be. | D．She has formed the habit of sitting in the garden. |
| A．Shows concern about. | B．Makes response to. | C．Agrees with. | D．Comes up with. |
