1 . It’s unlikely that we’ll see a dodo, a flightless bird, walking this earth anytime again, according to Beth Shapiro, a evolutionary molecular biologist.
“When most people think about de-extinction, they’re imagining cloning,” Shapiro said. Cloning, the approach that created Dolly, the sheep in 1996 and Elizabeth Ann, the black-footed ferret in 2020, creates an identical genetic copy of an individual by putting DNA from a living adult cell into an egg cell from which the nucleus (细胞核) has been removed. Adult cells contain all the DNA needed to develop into a living animal. Egg cells then use that DNA as a blueprint to turn themselves into many kinds of cells——skin, organs, blood and bones——the animal needs.
“But no living cells from dodos exist. Instead,” Shapiro said, “you’d have to start with a closely related animal’s genome (基因组) and then change it into one similar to dodos.” For example， mammoths (猛犸) are also extinct，but they were very closely related to modern Asian elephants, so researchers are attempting to bring mammoths back from extinction by creating a hybrid mammoth with some mammoth genes replacing part of the elephant genome in an elephant egg cell. However, there are likely millions of genetic differences between the genome of an Asian elephant and that of a mammoth according to Shapiro.
As for the dodo, its closest living relative is the Nicobar pigeon. Mammoths and Asian elephants are pretty closely related, whereas it had been more than 20 million years since the dodo and the Nicobar pigeon had any common ancestors. Genetic differences between the two bird species are therefore much greater, making it a formidable task to create a successful hybrid in the lab, Shapiro said.
Even if scientists manage to bring dodos back, the island where they once lived is a very different place nowadays, which make it impossible to reintroduce dodos without major intervention.
1. What is Paragraph 2 mainly about?| A．The special role of DNA. |
| B．The process of cloning. |
| C．The development of cloning. |
| D．The complexity of cloning. |
| A．Dodos are harder to bring back to life. |
| B．Their living cells are hard to preserve. |
| C．Cloning can be used to recreate extinct animals. |
| D．They share a similar genome with Asian elephants. |
| A．Urgent. |
| B．Possible. |
| C．Tough. |
| D．Different. |
| A．Favorable. |
| B．Intolerant. |
| C．Objective. |
| D．Negative. |
2 . The sperm whale is an astonishing creature. It’s longer than a semi-truck, weighs more than 90, 000 pounds and is the largest member of the toothed whale family. It’s known to dive 6, 500 feet in search of food, and to stay down there for longer than an hour at a time.
Perhaps most fantastically, the sperm whale’s brain weighs as much as 20 pounds-the biggest of any species on Earth. But when it comes to brains, is size all that matters? There’s a lot we don’t know about the sperm whale’s intelligence because it’s difficult to carry out neurological (神经的) testing on such a huge marine mammal. But some clues point to sperm whales being much smarter than we give them credit for.
A 2021 study published in Biology Letters, for example, looked back to 19th-century historical logbooks from whalers. Researchers found that sperm whales were at first easy to catch-but almost immediately, the whales learned how to evade hunters and whaling success dropped by 60 percent. The study suggests that the whales passed information to one another through soundwaves to avoid being caught.
Animals that have big brains usually have a few things in common. They usually live long lives; for example, sperm whales can live for 70 years or longer. Additionally, they’re capable of complex behaviors and they tend to be more socia1. Whales may work together to hunt or communicate in a language all their own.
What’s more, humans, whales and dolphins all have spindle neurons in their brains. These nerve cells make us capable of deeper thought, such as reasoning skills, memory, communication and adaptive thinking. And like humans, whales have emotional intelligence- meaning they＇re capable of empathy, grief and sadness. Still, in proportion to (与…成比例)our body size, the human brain is bigger than that of the sperm whale.
Yet there’s still so much we don’t know about how smart sperm whales really are. And just like the whalers of a century ago, we have likely been underestimating marine mammals, whether large or small, for as long as we’ve known of their existence.
1. Why do people know little about the sperm whale’s intelligence?| A．Sperm whales’ big size makes research difficult. |
| B．It didn’t attract scientists’ attention until recently. |
| C．Whalers didn’t keep enough records of their hunting. |
| D．Sperm whales usually stay deep down in the ocean. |
| A．Track. | B．Avoid. | C．Locate. | D．Trick. |
| A．The nerve cells distinguish humans from animals. |
| B．Sperm whales have smaller brains than humans. |
| C．Spindle neurons make higher intelligence possible. |
| D．Emotional intelligence is unique to whales and humans. |
| A．Sperm Whales Are Astonishingly Smart |
| B．Sperm Whales Have the Biggest Brain |
| C．Break the Code of Whale Language |
| D．Unlock the Mystery of Sea Mammals |
3 . “I like pigs,” Winston Churchill supposedly once said. “Dogs look up at us, cats look down on us, but pigs treat us as equals.” Whether Churchill’s contemporary George Orwell also liked pigs is less clear. But he, too, surely saw something in them that was lacking in other domestic beasts, for it was they who ended up running the show in novel Animal Farm. Pigs, then, are intelligent social creatures.
And, like all animals, they sometimes fight. A study just published in Animal Cognition by Ivan Norscia, a biological anthropologist at the University of Turin, in Italy, and his colleagues, looked at how a group of 104 domestic pigs went about resolving such incidents. In total, Dr. Norscia and his team studied the details of 216 pig conflicts over the course of six months.
Some pigs tend to be attackers; others tend to be victims. Who is what depends largely on weight, for, among pigs pounds mean power. The attacker might bite, kick, bump or lift the victim (or string together a sequence of those actions). Most conflicts ended in seconds, but some lasted a minute or two.
In most animal species that would be that. However, many of the pig conflicts Dr. Norscia observed had interested parties beyond the protagonists (主角). He therefore wanted to understand the role of these bystanders in resolving fights —and what this says about pigs’ cognitive (认知) abilities.
Since there was usually not enough time for a bystander pig to intervene during the heat of a conflict (though this did occur), he and his colleagues looked at what happened in the three minutes directly following an aggressive interaction. Sometimes, they found, the protagonists made up on their own —for instance, by touching noses.
On other occasions, though, a third pig stepped in. Sometimes this bystander acted as a peacemaker, engaging with the attacker and reducing the number of subsequent attacks compared with what might otherwise have been expected. Sometimes, by contrast, the bystander engaged with the victim. This appeared to calm the victim down, for it reduced anxiety-related behavior such as shaking and scratching.
1. Why does the author mention Winston Churchill in the first paragraph?| A．To prove pigs are clever. | B．To show pigs are inspirational. |
| C．To state Churchill loves pigs. | D．To introduce the topic of the text. |
| A．Their ages. | B．Their weight. |
| C．Their safety needs. | D．Their cognitive abilities. |
| A．To comprehend the role of bystanders in conflict resolution. |
| B．To figure out the relationship between pigs. |
| C．To record the details of 216 pig conflicts. |
| D．To find out the reason for pigs’ conflicts. |
| A．By shaking it. | B．By touching its nose. |
| C．By scratching its back. | D．By offering comfort to it. |
The Ancient City of Pingyao, originally named “Gu Tao”,
The three most historic sites in Pingyao, often referred to as the city’s Three Historic Treasures,
The first of these historic treasures, the ancient city wall is 6,163 meters long and separates the city into two parts — an old city enclosed within the walls
5 . The world of underwater slumber is unlike what we see on the surface. For mammals (哺乳动物), a good night’s sleep sends an animal into a state of unconsciousness (无知觉) during hours of restorative sleeping that helps heal the body and solidify memories firmly in the mind. For fish, however, sleep isn’t such a well-defined process. Instead, many fish species have taken to spending short periods in a state of reduced activity or rest while keeping their eyes open to scan the water for potential threats. During these periods of reduced activity, a fish’s bodily functions slow down and its watchfulness drops.
The breadth of animals in the ocean that exhibit this type of reduced activity is wide-reaching. Among the hundreds of thousands of creatures in the sea, some merely ride along with the current, such as jellyfish. Others find rocky bedrooms for the night, while those such as stingrays bury themselves in the sand to rest. However, it must be really hard to get a good night’s sleep when you breathe air but live in water. This is something that the world’s underwater mammals have to deal with.
To prevent themselves from drowning (溺死) in their sleep, underwater mammals such as dolphins and manatees have developed the ability to “turn off” one side of their brain to rest, known as unihemispheric sleep. While one side is fast asleep, the other keeps all the animal’s vital functions running, such as breathing. Manatees, for example, love to sleep, spending up to 12 hours a day in a deep slumber. However, as air-breathing animals, manatees need to surface every 20 minutes or so for oxygen. To achieve this, the half of the brain that’s still awake sends the sleeping manatee to the surface to get some air.
1. What does the underlined word “slumber” in paragraph 1 mean?| A．Rest. | B．Sleep. | C．Danger. | D．Activity. |
| A．Because fish remain partially awake. | B．Because fish need short resting time. |
| C．Because fish possess no consciousness. | D．Because fish pretend not to be sleeping. |
| A．Hiding in sand. | B．Riding the current. |
| C．Finding spots to rest. | D．Breathing while sleeping. |
| A．By sleeping less. | B．By adapting to the sea. |
| C．By surfacing periodically. | D．By controlling their breath. |
6 . Tima Abudhi is a 55-year-old mother of five. When growing up, she remembers watching her neighbors
As the mangroves
“Replanting the mangroves is not
Today, the women of Kizingitini no longer have to
Mangrove forests can
| A．cut away | B．settle down | C．set out | D．get up |
| A．moved | B．disappeared | C．died | D．rose |
| A．contribution | B．choice | C．disaster | D．luck |
| A．encouraged | B．motivated | C．forbade | D．persuaded |
| A．neighbor | B．community | C．beach | D．village |
| A．selling | B．assessing | C．closing | D．running |
| A．increased | B．gained | C．produced | D．decreased |
| A．difficult | B．easy | C．worthwhile | D．suitable |
| A．return | B．calm | C．withdraw | D．remove |
| A．hard | B．enough | C．long | D．cheap |
| A．struggle | B．stop | C．prepare | D．determine |
| A．attempt | B．witness | C．afford | D．refuse |
| A．unemployment | B．resignation | C．participation | D．ignorance |
| A．gender | B．wealth | C．income | D．age |
| A．cancel | B．keep | C．accelerate | D．slow |
7 . Several years ago, Jason Box, a scientist from Ohio, flew 31 giant rolls of white plastic to a glacier (冰川) in Greenland. He and his team spread them across 10,000 feet of ice, then left. His idea was that the white blanket would reflect back the rays of the sun, keeping the ice cool below. When he came back to check the results, he found it worked. Exposed ice had melted faster than covered ice. He had not only saved two feet of glacier in a short time. No coal plants were shut down, no jobs were lost, and nobody was taxed or fired. Just the sort of fix we’re looking for.
“Thank you, but no thank you.” says Ralph King, a climate scientist. He told Grey Childs. author and commentator, that people think technology can save the planet, “but there are other things we need to deal with, like consumption. They burned $50,000 just for the helicopter” to bring the plastic to the glacier. This experiment, quote-unquote, gives people false hope that climate change can be fixed without changing human behavior. It can’t. Technology won’t give us a free ride.
Individuals respond to climate change differently. Climatologist Kelly Smith is hardly alone in her prediction that someday soon we won’t be climate victims, we will be climate Choosers. More scientists agree with her that if the human race survives. The engineers will get smarter, the tools will get better, and one day we will control the climate. but that then? “Just the mention of us controlling the climate sent a small shiver down my back, Grey writes.” “Something sounded wrong about stopping ice by our own will,” he says.
Me? I like it better when the earth takes care of itself, I guess one day we will have to run the place, but for the moment, sitting at my desk, looking out at the trees bending wildly and the wind howling, I’m happy not to be in charge.
1. Why does the author mention Jason Box’s experiment in the first paragraph?| A．To introduce a possible solution to climate change. |
| B．To describe a misleading attempt to fix the climate. |
| C．To report on a successful experiment on saving the glacier. |
| D．To arouse people’s attention to the problem of global warming. |
| A．The fight against climate change will not succeed. |
| B．Technology is not the final solution, let alone its high cost. |
| C．It’s best to deal with climate change without changing our behavior. |
| D．Jason’s experiment plays a significant role in fixing climate change. |
| A．Favorable | B．Tolerant | C．Doubtful. | D．Unclear. |
| A．But should we fix the climate? |
| B．Is climate change a real problem? |
| C．How can we take care of the earth? |
| D．What if all the glaciers disappeared? |
8 . Steven Stein likes to follow garbage trucks. His strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. What is even more interesting is that one of Stein’s jobs is defending an industry behind the plastic shopping bags.
Americans use more than 100 billion thin film plastic bags every year. So many end up in tree branches or along highways that a growing number of cities do not allow them at checkouts(收银台). The bags are prohibited in some 90 cities in California, including Los Angeles. Eyeing these headwinds, plastic-bag makers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume.
Among the bag makers’ argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.
The industry has also taken aim at the product that has appeared as its replacement: reusable shopping bags. The stronger a reusable bag is, the longer its life and the more plastic-bag use it cancels out. However, longer-lasting reusable bags often require more energy to make. One study found that a cotton bag must be used at least 131 times to be better for the planet than plastic.
Environmentalists don’t dispute(质疑) these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years.
1. What has Steven Stein been hired to do?| A．Help increase grocery sales. |
| B．Recycle the waste material. |
| C．Stop things falling off trucks. |
| D．Argue for the use of plastic bags. |
| A．Bans on plastic bags. |
| B．Effects of city development. |
| C．Headaches caused by garbage. |
| D．Plastic bags hung in trees. |
| A．They are quite expensive. |
| B．Replacing them can be difficult. |
| C．They are less strong than plastic bags. |
| D．Producing them requires more energy. |
| A．Plastic, Paper or Neither |
| B．Industry, Pollution and Environment |
| C．Recycle or Throw Away |
| D．Garbage Collection and Waste Control |
9 . This fall, students at the University of Massachusetts found a new menu at their dining commons: the “diet for a cooler planet” menu. This meant herb-roasted lamb, raised with a carbon-friendly approach. It included sweet potatoes that had been picked from a local farm’s field post-harvest. The options were plant-heavy, locally grown, and involved little to no packaging.
“We wanted to let students participate in climate action by making choices about their food,” says Kathy Wicks, sustainability director for UMass Dining. The university is not alone in this effort. Increasingly, American consumers and institutions are thinking about how their food choices factor into climate change. For many, small choices at the grocery store, dining hall, and restaurant can feel more accessible than big-ticket options like buying a fuel-efficient car or installing home solar panels.
Small changes in dietary habits may make a big difference. Climate activists often target fossil fuels and transportation systems, but studies point to the food system as a significant contributor to global warming. According to Project Drawdown, a research organization that evaluates climate solutions, the way food is grown, transported, and consumed accounts for about a quarter of the world’s greenhouse gas emissions. Beef is a regular target. “If, on average, Americans cut a quarter pound of beef per week from their diet, it’s like taking 10 million cars off the road a year,” says Sujatha Bergen, director of health campaigns for the Natural Resources Defense Council. Food waste ranks third among climate solutions. While much waste occurs before consumers are involved — food left on the field or “chucked” because it does not fit appearance standards, Americans also throw out a lot of food they have purchased: about $ 1,600 worth a year per family of four.
“People are beginning to understand that their food choices make a big impact on climate,” says Megan Larmer, director of regional food at the Glynwood Center for Regional Food and Farming in New York. But, she cautions substantial change will need to come from the whole food system.
1. What is the purpose of the new menu at the University of Massachusetts?| A．To market the cold dishes. | B．To reduce the cost of packaging. |
| C．To popularize the plant-heavy diet. | D．To promote low carbon awareness. |
| A．Food is a decisive factor for climate change. |
| B．Food choices matter much to global warming. |
| C．Universities are working together in climate action. |
| D．Fuel-efficient cars are not affordable for consumers. |
| A．It has great influence on carbon reduction. | B．It is popular among millions of car drivers. |
| C．It has a close relationship with gas emission. | D．It plays a significant role in American’s diet. |
| A．Food System Reform: A Successful Trial | B．Global Warming: An Approaching Danger |
| C．Carbon Emission: A Killer, or Healer? | D．Low Carbon Diet: A Craze, or More? |
10 . Michael Gonsalves, a chef of Golden Oak at Disney World, has a cuisine concept rooted in fresh, locally-sourced ingredients that originated from childhood harvesting produce from their family garden with his mom to eventually leading kitchens at Walt Disney World Resorts to employ a sustainable model.
“Truly the whole process starts with menu planning,” he said. Creating one dish leads into the creation of many more through the end-to-end use of products. As chefs, they are always searching for the best ingredients. It is then their focus to ensure they appreciate and respect all that go into each and every one of them. For example, they source chicken that is naturally grown and fed on a natural plant forward diet, no hormones (激素) or additives — that’s used in many ways throughout menus from a simple grilled chicken breast to bone soup. Nothing goes to waste.
When they do have waste, even if minimal, they shift it from landfills to transform it into compost (堆肥) that’s then used across the Walt Disney World property. They also support Second Harvest, a local community food bank where healthy produce, prepared, but not served, meals eatable for human consumption are donated. Disney also works with pig farmers when they can’t distribute foods past the point of safety for human consumption. Besides, wildlife reservations love to get the meat because tigers and wild cats can still eat that.
Their operations are “on a path to a sustainable zero waste kitchen of tomorrow” where chefs learn the full-life cycle of plants from seed to plate and gain a better understanding and appreciation for the product and their craft.
Golden Oak at Disney has millions of bees that produce up to 300 pounds of honey per year, plus those bees help with cross pollination (授粉) of their gardens on a daily basis. They advocate a culture that helps develop not only the quality of food, but an appreciation for nature.
1. Where did Michael Gonsalves’ idea about cuisine come from?| A．His mom’s suggestions. | B．His dream of becoming a chef. |
| C．His interest in delicious food. | D．His labor experience as a child. |
| A．They are grilled to eat. | B．They are used to the fullest. |
| C．They are divided into groups. | D．They are selected by quality. |
| A．Give examples about zero waste. |
| B．Introduce the unique habit of wildlife. |
| C．Stress the importance of natural food. |
| D．Explain the operation mode of the food bank. |
| A．Disney World:New Cuisine Road |
| B．Michael Gonsalves:Creative Chef |
| C．Michael Gonsalves:Advocate of Food Diversity |
| D．Disney World:Pioneer in Environmental Protection |
