1 . In habitats across the planet, animals periodically drop everything to walk, fly or swim to a new place. Some animals 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. The Cory’s shearwater is an oceangoing seabird 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. What is the first paragraph mainly about?| A．It describes animals’ habitats. | B．It compares different species. |
| C．It talks about migration models. | D．It introduces a tracking technology. |
| A．The opening for learning and practice. |
| B．The unique living habit of Cory’s shearwaters. |
| C．The process scientists track Cory’s shearwaters’ movements. |
| D．The way Cory’s shearwaters form their migration patterns. |
| A．They travel as much as adult birds. | B．They lower the speed for exploration. |
| C．They move in a predictable manner. | D．They look for a course with their parents. |
| A．Exploration refinement contributes to birds’ adaptability. |
| B．Man-made changes make migration easier. |
| C．Animals make a safer journey via a fixed track. |
| D．A combination of strategies assures migration success |
2 . 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. |
3 . On Saturday 24 August 1918, it was raining cats and dogs and thundering over a city called Sunderland on the northeast coast of England. The storm lasted for only about ten minutes. People were surprised to see that it was not just rainwater falling from the sky. There were fish falling down, too! People came out to find out what was happening. They could not believe their own eyes. There were thousands of fish—sand eels (沙鳗)—lying on the ground. They were about seven centimeters long, and all were frozen solid (冻成硬块).
Sand eels swim together in large groups, often in sandy water, and are often found in large numbers in the North Sea, which reaches out to the east of Sunderland. How was it possible for these sand eels to fall from the sky and land on Sunderland?
Scientists believed the heavy thunderstorm that afternoon may have caused a waterspout (水龙卷). Waterspouts can be formed when strong winds move quickly in a circle over water. They are so powerful that anything less than one meter in length can be taken into them and forced into the clouds. The clouds carry whatever has been taken into them for long distances —sometimes over 150 kilometers. It’s very cold up there and everything soon freezes solid.
For hundreds of years there have been reports of small animals being taken into the sky through waterspouts. In 2009, dead tadpoles rained down on the city of Nanao in Japan. In 2012, fifty kilos of prawns fell from the sky over Sri Lanka. In 2017, fish fell on the coastal city of Tampico in Mexico.
It must be a very strange experience to see fish raining down on you. It would probably hurt if one fell on your head! With climate (气候) change and many reports of terrible storms, will the time ever come when it may really begin to rain cats and dogs?
1. What do we know about the sand eels that landed on Sunderland?| A．They were few in number. | B．They came in different sizes. |
| C．They were still alive when landing. | D．They probably came from the North Sea. |
| A．Clouds. | B．Waterspouts. | C．Strong winds. | D．The waters of the sea. |
| A．raining sea animals is not new in history | B．the environment is not pleasant in Japan |
| C．waterspouts can reach as far as Japan | D．different animals can fall in different countries |
| A．Our health. | B．Our environment. | C．The wild animals. | D．The news reports. |
4 . Tips for Green Travel with Kids
Travelling doesn’t mean letting go of all the eco-friendly choices we work so hard to achieve in our daily life. Here are a few tips for green travel with kids.
Booking nonstop flights whenever possible will reduce carbon emissions (碳排放). If the closest local airport doesn’t have nonstop flights to a certain place, check with other local airports to see if nonstop flights are available.
It’s easy when travelling to pull in to fast food restaurants for snacks.
| A．Walking is good for your health. |
| B．Try to cut back to save water and energy. |
| C．But you can pack healthy food from home. |
| D．Travelling is a great chance to introduce your kids to the world. |
| E．Reusable water bottles are easy to bring along wherever you travel. |
| F．Save energy by turning off the hotel room lights when you head out for the day. |
| G．You might have to drive a bit farther, but saving on carbon emissions makes it worthwhile. |
5 . One day, a woman walked into a pet store to buy a bird for her Thanksgiving Day party. The guy said, “We only have one parrot. But I think you do not want it because it can talk…” The woman said happily, “That’s great. I’ve always wanted a talking bird.” So the guy said, “Since you are a nice lady, I’ll give it to you as a gift.”
And the lady went home and put the bird on her bed and walked out of the room. But as soon as she walked into the kitchen, the bird started to speak dirty words as loud as it could. The woman walked back into the room thinking, “I can’t have this at my party!” So she took the bird and put it in the fridge. A few hours later, while the woman was eating, she remembered that her bird was still in the fridge. Quickly, she opened the door and found it was shivering. Then she took out the bird at once. She said to the bird, “I’ll keep you out of there if you don’t use that language again. Do you agree with me?”
The bird nodded and asked, “Can I just ask a quick question?” The lady nodded and said, “Yes, you may.” The bird pointed at the turkey behind him and asked, “What did he do?”
1. The woman went into the pet store because ________.| A．there were lots of nice birds in it |
| B．she wanted to buy a bird to make a big meal |
| C．she wanted to buy a bird for Thanksgiving Day party |
| D．she wanted to buy a bird for his son’s birthday |
| A．发抖 | B．睡觉 | C．生气 | D．跳动 |
| A．how the turkey was put into the fridge. | B．why itself was in the fridge. |
| C．who could be in the fridge. | D．why the turkey was in the fridge. |
| A．she wanted to cook it on Thanksgiving Day | B．the bird spoke dirty words |
| C．the bird liked living in the cold place | D．she thought it’s the best place for it to live in |
6 .
Elephant Conservation
Country:Thailand
This is a working vacation at a wildlife centre. Anyone can become a volunteer if he/she agrees to help the elephant keepers with tasks.
Daily tasks
Collect the elephants at 6:30 a.m. Take them to look for food in the forest. Clean the enclosure. Swim with the elephants in the lake in the afternoon. If volunteers want to relax after work, they can watch satellite television.
How this vacation helps
If these elephants hadn’t been rescued, they would still be living on the streets of Bangkok. A rural environment is much better for them than an urban environment where there is lots of pollution.
Gorilla Safari
Countries:Kenya, Rwanda, Uganda
Departures:Aug.—Dec., 2—3 departures per month
Extras:gorilla permit ￡220
If you’re lucky, you’ll see lions, elephants and rhinos on safari. The highlight of the trip is the opportunity to see gorillas in the mountain forests. However, you must be in good health—if a gorilla caught a cold, it would be extremely harmful to its whole family.
How this vacation helps
There are only about 600 mountain gorillas left in the world as human activity has reduced the area where they can live. When you buy a permit, this will pay for the protection of the national park.
Polar Bear Watching
Country:Canada
Departures:sixty trips between Oct. 1—Nov. 19
Every October and November, groups of polar bears gather in Hudson Bay. As they are normally lonely creatures, this is unusual. The bears wait for the ocean to freeze so they can hunt seals, so this is the perfect opportunity to see them.
How this vacation helps
If the Arctic ice cap melts due to global warming, polar bears will be in danger. We give a share of our profits to the Polar Bears Alive Charity.
Your comment
These awesome bears get all the liquid they need from their food.
1. What will an elephant volunteer do?| A．Take food for elephants at 6:30 a.m. |
| B．Sweep the houses of elephants. |
| C．Wash elephants in the lake in the afternoon. |
| D．Watch satellite television on elephants. |
| A．You can find gorillas in Kenya and Canada. |
| B．You might get a cold in the mountain forests. |
| C．Visitors need to pay $220 to see 600 gorillas. |
| D．There are about 10 trips to visit gorillas. |
| A．Bears don’t need to drink water. |
| B．Bears store their liquid in their food. |
| C．Bears drink all kinds of liquid. |
| D．Bears eat mainly liquid food. |
| A．solve the problem of global warming |
| B．protect wild animals |
| C．deal with the pollution in cities |
| D．build more national parks |
7 . Population data for European mountain birds have been for the first time combined in a recent study, with worrying results: the abundances of mountain-specialist birds has declined by as much as 10% in the 2000s.
Ecological communities in mountain areas include species not found in any other habitats. These species are also very susceptible to climate change, as global warming is reducing their liveable habitats. In principle, species may relocate further up the mountains, but closer to the top their habitat inevitably shrinks.
According to the new article, the abundance of European mountain birds has in fact declined in line with climate change projections.
The recently released study examined the population trends of 44 bird species in the 2000s in the mountain and fell regions of Fennoscandia, Great Britain, the Alps and the Iberian Peninsula. A decline was seen in 14 of the observed species, while eight of them saw significant increase.
“On average, population decline among the species studied was 7% over the 13-year research period, making the situation of mountain birds distinctly worse compared to, for example, European forest birds, whose numbers did not change during the same period,” explains Aleksi Lehikoinen, an Academy of Finland research fellow at the Finnish Museum of Natural History Luomus (part of the University of Helsinki), who headed the study.
The situation is the direst for species that only inhabit mountain regions and are unable to live in other European environments. For these species, known as mountain specialists, the numbers dwindled by as much as 10% during the monitoring period.
1. What can we get from the passage about European mountain birds?| A．They are newly found species. |
| B．They can be found at any place of the world. |
| C．The number of the birds has decreased greatly. |
| D．The number of the birds has increased greatly. |
| A．Air pollutions. |
| B．Global warming. |
| C．Human activities. |
| D．Competition with other species. |
| A．All 44 bird species decreased. |
| B．Only 8 of the species declined. |
| C．14 of the observed species declined. |
| D．There was no change in the number of the bird species. |
| A．Serious. | B．Useful. |
| C．Suitable. | D．Waterless. |
8 . Even though these monuments are extremely well known, they hold secrets that not many people are aware of.
Empire State Building
On the 103rd floor of the Empire State Building in New York, there is a secret observation deck that not a lot of people know about. To access the balcony, you have to take a series of elevators and then a very steep, narrow staircase. The observation deck isn’t open to the public, but many celebrities have been photographed there.
Eiffel Tower
There is a secret apartment and office at the very top of the Eiffel Tower that has just recently become open to the public. In 1889, Gustave Eiffel, the engineer of this famous Paris landmark, built himself a private apartment and office. It has been restored and has wax models of Gustave, his daughter, and American inventor Thomas Edison on display.
Statue of Liberty
There is actually a room in the torch of the Statue of Liberty that showcases breathtaking views of the city. People used to be able to visit that room until 1916 when German agents blew up a nearby wharf (码头). The explosion sent broken pieces into the raised arm of Lady Liberty, making the staircase up to the hidden room unsafe.
Disneyland
Hardcore Disney fans might think they know all of the secrets of the park, a famous U.S. landmark, but many haven’t heard of Club 33. This exclusive restaurant is hidden behind an unmarked door in Disneyland’s New Orleans Square. If you want to dine here on your next trip to Disneyland, don’t get your hopes up. It costs $25,000 to join the club, plus an annual fee of $12,000.
1. What do the monuments have in common?| A．They are all in Europe. |
| B．They all have skyscrapers. |
| C．They are all the best-known. |
| D．They all hide little-known secrets. |
| A．Disneyland. | B．Eiffel Tower. |
| C．Statue of Liberty. | D．Empire State Building. |
| A．Attractive. | B．Expensive. |
| C．Wonderful. | D．Beautiful. |
9 . When I was a baby, I entertained you and made you laugh．Whenever I was “bad”, you’d shake your finger at me and ask: “How could you?”—— but then you’d give up, and roll me over for a belly scratch and I believed that life could not be any more perfect．
My housetraining was a long process, because you were terribly busy, but we worked on that together. We went for long walks, runs in the park and car rides. We stopped for ice cream. I took long naps in the sun waiting for you to come home at the end of the day.
Gradually, you began spending more time at work and on your career, and more time searching for a human mate. Eventually, you fell in love. She, now your wife, is not a dog person, but I still welcomed her into our home. I was happy because you were happy. Then the human babies came along and I shared your excitement, I was fascinated by their pinkness, how they smelled, and I wanted to mother them too. Your wife was afraid I would bite them. But nevertheless, as they began to grow, I became their friend.
Now, you have a new job in another city and you and they will be moving to an apartment that does not allow pets. You’ve made the right decision for your “family”, but there was a time when I was your only family.
I was excited about the car ride until we arrived at the dog pound. It smelled of dogs and cats, of fear, of hopelessness. You filled out the paperwork and said: “I know you will find a good home for her.” They shrugged and gave you a pained look. The children were in tears as they waved me goodbye. And “How could you?” were the only three words that swept over my mind.
Is it better to live with hope or without hope? At first, whenever anyone passed my pen, I rushed to the front, hoping it was you, that you had changed your mind and that this was all a bad dream.
My beloved master, I will think of you and wait for you forever. I hope you receive more faithfulness from your family than you showed to me.
1. Who tells this story?| A．A dog. | B．A child. | C．A dog’s owner. | D．A dog trainer. |
| A．He had a newborn baby. | B．His wife did not like the dog. |
| C．He was moving into a new building. | D．He thought the dog tootroublesome. |
| A．It hoped to be adopted by another family. | B．It continued to love its former owner. |
| C．It did not trust humans any more. | D．It was excited about the pound. |
| A．relieved | B．aggressive | C．scared | D．loyal |
10 . The United States Department of Agriculture has a program called Wildlife Services. Its job is to help protect agricultural and other resources. Often that means helping farmers deal with unwelcome visitors. This organization has experts from different fields and it has set up thousands of inquiry centers all over the country where farmers can explain their difficulties and get practical help.
One example from Wildlife Services of its work involved a farmer in Washington State in the Pacific Northwest. Several years ago, thousands of Canada geese landed on his fields. The geese began to eat his carrot crop. Biologists from the program suggested that the farmer use noise-making devices and other measures to scare the large birds away. These efforts succeeded, which made the farmer quite happy. Wildlife Services also has a livestock protection program. The program just offers suggestions to keep those unwelcome visitors away instead of killing them. The Wildlife Services program is part of the Animal and Plant Health Inspection Service, or APHIS. APHIS offers some suggestions for ways to keep predators away. For example, try to keep food and water safe from wildlife. Fences may help keep out wolves, especially if the fences are at least two meters high.
Experts suggest providing secure shelter for chickens, sheep and other animals that could be attacked. They also suggest using lights above places where these animals are kept. And they advise people who see wolves to chase them away by shouting, making loud noises or throwing rocks. And to protect livestock, consider using guard animals such as dogs and donkeys, which are very effective.
For home gardeners, a two-meter fence might help keep out deer. To keep out rabbits, a wire fence has to be only about a half-meter high. It should extend fifteen centimeters underground to keep rabbits from digging under it. If snakes are a problem, remove dead trees and cut high grass to destroy their hiding places. Due to its effective work, ever since Wildlife Services was started, it has been well received by farmers all over the States and neighboring countries such as Canada and Mexico.
1. What does Wildlife Services intend to help farmers handle?| A．Animals that attack farmers. |
| B．People who pollute the farmland. |
| C．People who don’t care about wildlife. |
| D．Animals that do harm to crops or livestock. |
| A．The cabbage crop was eaten up by Canada geese. |
| B．The farmer didn’t have a gun to kill those Canada geese. |
| C．Wildlife Services involves some biologists in its group. |
| D．The farmer likes to eat Canada geese very much. |
| A．Ways to protect livestock. |
| B．Ways to deal with wolves. |
| C．How to protect crops. |
| D．How to hunt wildlife. |
| A．A tourist brochure. |
| B．A science magazine. |
| C．An entertainment program. |
| D．A business report. |
