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 . As a student,I heard the line “graduate school is stressful” so many times that it began to bear no meaning.
Sure,there were campus resources that encouraged healthy behaviors,including deep thought,and the benefits of self-care,but self-care sounded expensive and time-consuming to me;I had work to do.And I was not a fan of deep thought:The thought of sitting still for 30 minutes only caused me greater stress.But one thing I couldn’t stay away from was walking my dog.
Tessa is a six-year-old lovely coonhound that I got as a gift to myself,for completing my undergraduate degree at the University of Rhode Island in Kingston.I first saw Tessa as a thin and little dog in a photo on the Internet.She was found,huddled up with her friends,in a deserted house in Alabama.
Because of Tessa,I took frequent walking breaks while studying for a master’s degree in public health at Yale University in New Haven,Connecticut.I discovered the best corners and crannies on campus,including the sloping grass land behind the school,filled with squirrels and sticks — a safe place for dogs.I found a tree accidentally with a swing,overlooking the Yale Peabody Museum of Natural History,which offered the best sunset view in town.On our daily walks,I found calm in the woods and quiet in the early mornings enveloping the city streets.
Now,as I work from home,Tessa continues to help me deal with a lonely existence.Just like in graduate school,she demands that I stop working,however briefly,and accompany her on a walk.These forced breaks throughout the day take me away from my computer and help me to stay active,greet my neighbors and come back to work refreshed.And although I certainly haven’t escaped from stress,and I am still trying to find my footing in research,I will continue to make time for walks every day.I recommend it very much.
1. How did the author feel about deep thought?| A．Anxious. | B．Time-consuming. | C．Disordered. | D．Encouraged. |
| A．Lovely. | B．Gifted. | C．Poor. | D．Courageous. |
| A．Tessa likes walking very much. |
| B．The Yale University is very beautiful. |
| C．The author likes both the city and the university. |
| D．Tessa is helpful for the author to get through graduate school happily. |
| A．The author often feels lonely at home. |
| B．The author works hard but exercises less. |
| C．Both the author and the neighbors like Tessa. |
| D．Walking with Tessa benefits the author much. |
THE AMAZING ANIMALS OF AUSTRALIA
Our topic today is “Creatures Unique to Australia”, with questions answered by wildlife expert, Dr Jim Smith.
Australia has lots of unique animals, but which animal is a symbol of the country?
It has to be the kangaroo, as it has a wide distribution throughout the country. It’s a tough animal that has to survive in a difficult environment. Also, it cannot walk backwards, so it is always moving forwards. This expresses the strength and resolve of the Australians as individuals and as a nation. Baby kangaroos weigh only two grammes at birth. They then find their way into their mother’s pouch—a kind of pocket—to stay safe and warm. They sleep and drink milk in that temporary, protected environment until they are about seven or eight months old. After this phase, they go out to try their legs. After they learn to jump, they gradually spend less time with their mother and learn to be independent. Kangaroos may look cute, but encounters with them don’t always end so well. Kangaroos can hit and kick very hard, so please folks, if you see some kangaroos, remember they’re not for petting!
Koalas are cute, and we see so many pictures of people holding them. But in many places in Australia, it is against the law to even touch them. Can you clarify that?
They are really quite cute, but the truth is, koalas are very sensitive creatures who can easily panic because of even small changes in their environment. They spend quite a lot of time eating, sleeping, and hanging onto tree trunks, so interaction with humans can cause them a lot of stress.
Because of this, the government began to make laws against touching koalas, in the interest of animal protection, as well as public safety. So, if you see one in the wild, you shouldn’t approach it to pick it up or even touch it. If you want to hold a koala, you have to go to certain licensed zoos where animal experts make sure that the koalas selected for each session are in a good state for human contact and that they are handled for only a limited time and on a limited frequency of occasions.
So, we’ve talked about some cute animals. What about animals which aren’t so cute?
My favourite is a little creature called the Tasmanian devil. If you are out camping in Tasmania and come across one, the experience might scare you! Tasmanian devils hunt at night, so you won’t usually see them, but you may hear their loud cries when they are fighting or eating. The noise they make could wake the dead. Frightening! They are about the size of small dogs and look like rather large black rats. They also have a terrible smell! Their diet is mostly dead animals. Fortunately, despite their name, they are generally not violent towards people.
Australia also has some animals that many people have never heard of, for example, the duckbilled platypus. Is that some kind of bird?
Not at all. While it may lay eggs in a nest like a bird, it’s really a primitive mammal, with a unique biology. Its eggs hatch after about ten days, and then the baby platypus nurses from its mother like all other mammals. Its nose looks like a duck’s bill, and it has feet like a duck’s so it can dive under the water, but it’s covered in hair. Do you know what’s really strange about a platypus? The platypus doesn’t use its senses of sight or smell to find food. It has a capacity to find food in the water by using electrical sensors in its bill. There are only a small handful of animals in the world that can do that!
1. What can we infer from the last two sentences of the first part?| A．Kangaroos can be dangerous sometimes. | B．It is hard to take kangaroos as family pets. |
| C．Meeting kangaroos is always a lucky thing. | D．It is always good to pet a cute kangaroo. |
| A．After they were born for ten days. | B．Until they can dive under the water. |
| C．Since they were born immediately. | D．When they are about seven or eight months old. |
| A．It may disturb their daily activities. | B．It can change their living habits. |
| C．It will bring pressure to their life. | D．It may attack people by surprise. |
| A．They are aggressive against humans. | B．They frighten their prey to death. |
| C．They belong to a rat family. | D．They make loud and frightening noise. |
4 . Parrots are prey animals, which means that other predators (捕食者) in the wild, such as hawks or snakes, are looking to make them into a meal. This one factor influences parrots’ behavior in your house more than any other.
Parrots are most easily hurt when feeding on the ground. Membership in a group plays an important function in ensuring their safety and improving their chances of survival from attacks by predators. The most common predators of parrots include hawks, snakes, cats, monkeys, and bats. Some predators make attacks only during the day while others hunt in the night.
As prey animals, parrots are constantly watching out for danger and they instinctively (本能地) react to risks. Their first choice is to take flight. However, if this is not possible, they will fight with their powerful beaks to defend themselves.
Because their biggest enemy is the hawk, parrots are especially reactive to quick movements from above and behind. For this reason, it is wise to avoid quick, sudden movements near your bird. This is a built-in reaction not subject to logic or reason. Simple and relatively harmless household objects can draw extreme fear responses from a bird. For example, a balloon may represent a hawk or a vacuum hose (吸尘器软管) may be the same as a snake in your bird’s mind.
As prey animals, parrots are often frightened by exposure to new household items or strangers. It is important to expose your bird to safe experiences and changes starting at a very young age to build flexibility and improve their adaptability. Variety in diet and toys, travel, and exposure to new people and places all help to make your bird more flexible and adaptable to change.
1. What is important for parrots to better survive from attacks in the wild?| A．Living in a group. | B．Growing beautiful feathers. |
| C．Feeding on the ground. | D．Avoiding coming out at night. |
| A．To attack back. | B．To get away. |
| C．To protect the young. | D．To play dead. |
| A．It may explode suddenly. | B．It may be in a strange shape. |
| C．It may have a strong color. | D．It may move around quickly. |
| A．To explain wild parrots’ behavior. | B．To give advice on raising a parrot. |
| C．To call for action to protect animals. | D．To introduce a study on bird ecology. |
5 . Overlooking the Davis—Gant Varsity Soccer Field, a bed of overturned soil waits for further development. In a few years, this area will become a natural habitat and a playground for animals and residents. This peaceful area didn’t appear naturally, but through planning and action taken by Catlin Gabel’s Tiny Forest project launched by teacher Patrick Walsh.
Forests typically take hundreds of years to mature, with four stages of growth. “Tiny forests flatten out time through the planting of all four layers (层),” Walsh explained. The end result is a fast-growing, native forest in about 20 years. Over 600 plants from 43 species will be planted in the tiny forest, the first one in Oregon.
Walsh was inspired to build a tiny forest after hearing about this idea, which emerged in Japan and has taken hold in North America. He shared his vision with seniors in his class. The seniors researched tiny forests and made a proposal resulting in Clean Water Services donating 60 trees and $5,000 from the National Oceanic and Atmospheric Administration. Armed with these resources, Walsh and the students started working. “Something I didn’t really expect was the outpouring of students’ enthusiasm. Seeing students from all grades volunteered to contribute to the ‘dirty work’ really blew me away,” Walsh said.
Senior Megan Cover has been at the school since the first grade. “I’ll graduate after working on this project, which is surely sad, but it’s really rewarding and great to be a part of this project and to do my bit. We’re creating this educational space for many young kids,” Cover said.
Walsh summed up his goal of the project, which is to build a place where students can enjoy and learn about nature. “The forest will obviously not solve climate change, but it will deserve the efforts if the kids think about climate change and remember the importance of reforestation and trees when they look outside at the forest.”
1. What is special about tiny forests?| A．They originated in North America. | B．They are usually planted in schools. |
| C．They contain various types of trees. | D．They become mature in a shorter time. |
| A．The abundance of native tree species. | B．Public concern about the environment. |
| C．The active participation of students. | D．Support from local organizations. |
| A．Proud. | B．Regretful. | C．Grateful. | D．Disappointed. |
| A．A model. | B．A reminder. | C．A resource. | D．A witness. |
6 . On the island of New Zealand, there is a grasshopperlike species of insect that is found nowhere else on the earth.New Zealanders have given it the nickname weta, which is a native Maori word meaning “god of bad looks” . It’s easy to see why anyone would call this insect a badlooking bug. Most people feel disgusted at the sight of these bulky(笨重的) , slowmoving creatures.
Wetas are natural creatures;they come out of their caves and holes only after dark.A giant weta can grow to over three inches long and weigh as much as 1.5 ounces.Giant wetas can hop up to two feet at a time.Some of them live in trees, and others live in caves.They are very longlived for insects, and some adult wetas can live as long as two years.Just like their cousins grasshoppers and crickets，wetas are able to “sing” by rubbing their leg parts together, or against their lower bodies.
Most people probably don’t feel sympathy for these endangered creatures, but they do need protecting.The slow and clumsy wetas have been around on the island since the times of the dinosaurs, and have evolved and survived in an environment where they had no enemies until rats came to the island with European immigrants. Since rats love to hunt and eat wetas, the rat population on the island has grown into a real problem for many of the native species that are unaccustomed to its presence, and poses a serious threat to the native weta population.
1. What can we know from the passage?| A．Wetas are unpleasant to the eye. |
| B．The Maoris nicknamed themselves “wetas”． |
| C．The Europeans brought wetas to New Zealand. |
| D．The weta is a newly discovered insect species. |
| A．They are quick in movement. |
| B．They are decreasing in number. |
| C．They are very active in the daytime. |
| D．They have a short lifespan for insects. |
| A．the dinosaur’s | B．the weta’s |
| C．the island’s | D．the rat’s |
| A．A sports section. |
| B．A business section. |
| C．A biology section. |
| D．An entertainment section. |
7 . After years of heated debate, gray wolves were reintroduced to Yellowstone National Park. Fourteen wolves were caught in Canada and transported to the park. By last year, the Yellowstone wolf population had grown to more than 170 wolves.
Gray wolves once were seen here and there in the Yellowstone area and much of the continental United States, but they were gradually displaced by human development. By the 1920s, wolves had practically disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around.
The disappearance of the wolves had many unexpected results. Deer and elk populations — major food sources (来源) for the wolf — grew rapidly. These animals consumed large amounts of vegetation (植被), which reduced plant diversity in the park. In the absence of wolves, coyote populations also grew quickly. The coyotes killed a large percentage of the park’s red foxes, and completely drove away the park’s beavers.
As early as 1966, biologists asked the government to consider reintroducing wolves to Yellowstone Park. They hoped that wolves would be able to control the elk and coyote problems. Many farmers opposed the plan because they feared that wolves would kill their farm animals or pets.
The government spent nearly 30 years coming up with a plan to reintroduce the wolvers. The U.S. Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone. Today, the debate continues over how well the gray wolf is fitting in at Yellowstone. Elk, deer, and coyote populations are down, while beavers and red foxes have made a comeback. The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.
1. What is the text mainly about?| A．Wildlife research in the United States. |
| B．Plant diversity in the Yellowstone area. |
| C．The conflict between farmers and gray wolves. |
| D．The reintroduction of wolves to Yellowstone Park. |
| A．Damage to local ecology. |
| B．Preservation of vegetation. |
| C．A decline in the park’s income. |
| D．An increase in the variety of animals. |
| A．Doubtful. | B．Uncaring. | C．Positive. | D．Disapproving. |
When garden designer Jane Gates moved to the Sussex countryside in 2015, she fell in love with a traditional black barn conversion(改建的房屋), and set about creating a droughts-resistant garden around it.
Over the years, Gates
Gates’ garden is a big gravel(砾石)one.
9 . Five years ago, I was a trail ride leader at a holiday farm in Victoria. My favourite horse was a warmblooded called Holly, a chestnut mare. Aged seven, she was
One day, as we headed back from a ride on the beach, Holly and I were
At the bottom of the hill as we rounded a corner, Holly
I have heard that horses have a better sense of
Holly then
| A．negative | B．graceful | C．pitiful | D．aggressive |
| A．solution | B．reaction | C．problem | D．difficulty |
| A．frightened | B．delighted | C．touched | D．attracted |
| A．chasing | B．leading | C．following | D．pushing |
| A．proceeded | B．preferred | C．hesitated | D．refused |
| A．evidence | B．truth | C．signals | D．symbols |
| A．sped | B．rushed | C．escaped | D．slowed |
| A．rabbit | B．horse | C．monster | D．snake |
| A．turn | B．case | C．chance | D．rule |
| A．sealed | B．planted | C．fastened | D．frozen |
| A．vision | B．direction | C．smell | D．hearing |
| A．proved | B．denied | C．ignored | D．demonstrated |
| A．Unfortunately | B．Undoubtedly | C．Thankfully | D．Instantly |
| A．fell off | B．went back | C．came out | D．stepped forward |
| A．responsible | B．regretful | C．grateful | D．available |
10 . A month after Hurricane Katrina, I returned home in New Orleans. There lay my house, reduced to waist high ruins, smelly and dirty.
Before the trip, I’d had my car fixed. When the office employee of the garage was writing up the bill, she noticed my Louisiana license plate. “You from New Orleans?” she asked. I said I was. “No charge,” she said, and firmly shook her head when I reached for my wallet. The next day I went for a haircut, and the same thing happened.
As my wife was studying in Florida, we decided to move there and tried to find a rental house that we could afford while also paying off a mortgage (抵押贷款) on our ruined house. We looked at many places, but none was satisfactory. We’d begun to accept that we’d have to live in extremely reduced circumstances for a while, when I got a very curious e-mail from a James Kennedy in California. He’d read some pieces I’d written about our sufferings for Slate, the online magazine, and wanted to give us (“no conditions attached”) a new house across the lake from New Orleans.
It sounded too good to be true, but I replied, thanking him for his exceptional generosity, that we had no plans to go back. Then a poet at the University of Florida offered to let his house to me while he went to England on his one-year paid leave. The rent was rather reasonable. I mentioned the poet’s offer to James Kennedy, and the next day he sent a check covering our entire rent for eight months.
Throughout this painful experience, the kindness of strangers has done much to bring back my faith in humanity. It’s almost worth losing your worldly possessions to be reminded that people are really nice when given half a chance.
1. The garage employee’s attitude towards the author was that of .| A．unconcern | B．sympathy |
| C．doubt | D．tolerance |
| A．He was a writer of an online magazine. |
| B．He was a poet at the University of Florida. |
| C．He offered the author a new house free of charge. |
| D．He learned about the author’s sufferings via e-mail. |
| A．the author’s family was in financial difficulty |
| B．rents were comparatively reasonable despite the disaster |
| C．houses were difficult to find in the hurricane-stricken area |
| D．the mortgage on the ruined house was paid off by the bank |
