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 . Steven Stein likes to track garbage trucks. He says, “It’s hard to resist.” Stein’s strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including stuff that falls off garbage trucks as they run down the road. What is even more interesting is that one of Stein’s current plans is defending an industry behind a source of trash: plastic shopping bags.
Americans use more than 100 million plastic bags every year. So many end up in tree branches or along highways that a growing number of cities are banishing (排除) them from checkout lines. The bags are outlawed in some places in the USA.
Facing these situations, plastic-bag manufacturers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume. “It’s important to base your decisions on facts,” says Stan Bikulege, CEO of Hilex Poly, which has hired Stein.
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 can take the place of plastic bags: reusable shopping bags. The sturdier a reusable bag is, the longer its life and the more plastic-bag use it cancels out. But this plan has another side. Longer-lasting reusable bags often require more energy to make.
Environmentalists don’t agree with these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years. So are reusables our destiny? The answer is probably yes. And Andy Keller, inventor of reusable polyester (聚酯纤维) bags, says, ”If you can carry it out in your hands or put it back in your car, you don’t need a bag.”
1. The first paragraph serves as___________.| A．an explanation | B．an introduction | C．a comment | D．a background |
| A．To collect facts about shopping bags. |
| B．To show plastic bags are eco-friendly. |
| C．To research on people’s consuming habits. |
| D．To prove plastic bags are better than people thought. |
| A．They look a bit ugly. | B．They are easy to break. |
| C．Their prices are comparatively high. | D．Their production is energy-consuming. |
| A．Stronger. | B．Lighter. | C．Heavier. | D．Softer. |
| A．Forget about plastic bags. | B．Paper bags are coming. |
| C．Paper, plastic or neither. | D．A strange scientist. |
3 . 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. |
Shanghai Oriental Pearl Tower
This 468-meter-high tower is the world’s sixth and China’s second
Visitors travel up and down the Oriental Pearl Tower in double-decker elevators
5 . 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 |
Dogs are often called “man’s best friend” and make ideal pets.
The most attractive quality of
Furthermore, dogs are strong
And finally, dogs can be
To sum up, dogs are
I sat at the breakfast table with my four-year-old son, Andy, trying to ignore the ache in my stomach. “Mama, want to play?” “Not today, baby.” I shook my head. These days I could barely get out of bed. I was still recovering from an operation. I hoped for strength and happiness. But the future seemed so hopeless.
Suddenly Andy jumped up from his spot on the kitchen floor. “Bird!” he shouted, rushing to our courtyard. Sure enough, there was a white dove seated in a tree. It sat there for a few moments, and then flew away. Strange, I’d never seen one in our neighborhood before.
When I dragged myself to the kitchen the next morning, the dove was back. This time it was with a mate carrying sticks, “Look, Andy,” I said, pointing to the tree. “They are going to make a nest.” The doves flew in and out of the courtyard all week, building on top of the tree.
Andy could hardly contain his excitement. Every morning, he’d run into the kitchen and take his spot by the door, talking to the birds while they worked. His happiness was influential. Much as I was sad, I couldn’t help but look forward to the doves’ visit too.
Then it all went wrong. The courtyard was a safe enough spot for a nest, but the tree is broad, thin leaves were far from stable. One night, a strong wind blew, throwing the doves’ nest to the ground. I heard the twigs(细枝) break apart.
I examined the damage. Nothing good ever lasted. I wouldn’t blame the doves if it never came back. But they returned. They started again from the beginning. Again, though, the wind destroyed all their hard work. The next day, and the next, they started again, as if nothing had happened.
注意：1.续写词数应为150左右；
2.请按如下格式在答题卡的相应位置作答。
I knew I had to do something.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________“It works! The birds are back!” Andy announced.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Horses are picky eaters
Horses have an even better sense of smell than humans do. When horses raise their noses and open their nostrils (鼻孔), their nervous system allows them to sense smells we can’t sense. This might explain why they refuse dirty water and carefully move around meadows, eating only the tastiest grasses, experts say.
Whale says thanks
In 2018, a whale expert spotted a humpback whale trapped in a fishing net and spent an hour freeing it. Afterward, in an hour-long display of thanks, the whale swam near their boat and leaped into the air about 40 times.
Pandas like to be naughty
Is there anything more lovely than a baby panda, except maybe a human baby? In fact, baby pandas sometimes behave like human babies. They sleep in the same positions and value their thumbs. Pandas are shy by nature for its shy behaviors such as covering its face with a paw or ducking its head when confronted by a stranger.
A cat honors its owner
Paper towels, and a plastic cup are just a few of the gifts that Toldo, a devoted three-year-old gray-and-white cat, has placed on his former owner Iozzelli Renzo’s grave every day since the man died in September 2018. Renzo adopted Toldo from a shelter when the cat was three months old, and the two formed an inseparable bond. After Renzo passed away, Toldo followed the coffin to the cemetery, and now “stands guard” the grave for hours at a time.
1. What can horses do to pick delicious grasses?| A．Feel them. |
| B．Taste them. |
| C．Smell them. |
| D．Observe them. |
| A．They are clever. |
| B．They have a grateful heart. |
| C．They are active and lovely. |
| D．They have a good sense of smell. |
| A．The whale |
| B．The cat. |
| C．The horse. |
| D．The panda. |
9 . Bertie knew there was something in the wind. His mother had been sad in recent days, not sick, just strangely sad. The lion had just lain down beside him, his head warm on Bertie’s feet, when Father cleared his throat and began, “You’ll soon be eight, Bertie. A boy needs a proper education. We’ve found the right place for you, a school near Salisbury in England.”
His heart filled with a terrible fear, all Bertie could think of was his white lion. “But the lion,” he cried, “What about the lion?”
“I’m afraid there’s something else I have to tell you,” his father said. Looking across at Bertie’s mother, he took a deep breath. Then he told Bertie he had met a circus owner from France, who was over in Africa looking for lions to buy. He would come to their farm in a few days.
“No! You can’t send him to a circus!” said Bertie. “He’ll be shut up behind bars. I promised him he never would be. And they will come to see him and laugh at him. He’d rather die. Any animal would!” But as he looked across the table at them, he knew their minds were quite made up.
Bertie felt completely betrayed. He waited until he heard his father’s deep breathing next door. With his white lion at his heels, he crept downstairs in his pyjamas, took down his father’s rifle from the rack and stepped out into the night. He ran and ran till his legs could run no more. As the sun came up over the grassland, he climbed to the top of a hill and sat down, his arms round the lion’s neck. The time had come. “Be wild now,” he whispered. “You’ve got to be wild. Don’t ever come home. All my life I’ll think of you, I promise I will.” He buried his head in the lion’s neck. Then, Bertie clambered down off the hill and walked away.
When he looked back, the lion was still sitting there watching him; but then he stood up, yawned, stretched, and sprang down after him. Bertie shouted at him, but he kept coming. He threw sticks. He threw stones. Nothing worked.
There was only one thing left to do. Tears filling his eyes and his mouth, he lifted the rifle to his shoulder and fired over the lion’s head.
1. Bertie’s mother was sad probably because she________.| A．had lied about her good health condition | B．had decided to send Bertie to a new school |
| C．knew selling the lion would upset Bertie | D．knew Bertie would hate to go to England |
| A．some audience | B．other animals | C．Bertie’s friends | D．circus’s owners |
| A．kill the lion out of helplessness | B．protect himself from being chased |
| C．threaten the lion back to the wild | D．show his anger towards his father |
| A．circuses are the last places for animals to live |
| B．animals belonging to the wild should be set free |
| C．parents are sometimes cruel to their children |
| D．people and animals can be faithful to each other |
| A．Summer. | B．Fall. | C．Winter |
