| A．Eating. | B．Lifting weights. | C．Riding bikes. |
2 . Osedax worms have been found in oceans all over the world. They’ve only ever been spotted on bones, which makes some scientists think that the bone-eaters are specialized to live in odd ecosystems, such as whale falls. “Those kinds of animals are definitely uniquely adapted to the environment in which you find them, ”says marine biologist River Dixon. She is a graduate student at the University of Louisiana at Lafayette.
But as recent experiments show, the bone-eaters may not be picky about what type of bones they devour(吞食). Last year, biologists spotted Osedax worms in the Gulf of Mexico for the first time. And not on whale bones. Dixon was part of a research team that made the discovery. In early 2019, her group put the dead bodies of three alligators(短吻鳄)in water about 2 kilometers deep. Over the next few months, they sent a remote-controlled vehicle a few times to spy on what were essentially “alligator falls”.
51 days after the alligators were placed in the seawater, scientists revisited. “The flesh was gone”, Dixon says. . “It had been reduced to just the skeleton(骨骼).” And just as at whale falls, it hosted a carpet of bone-eating Osedax worms. These worms were similar to other bone-eaters but represented a never-before observed species. That means the scientists who found them get to name it (although Dixon says they haven’t settled on a name yet).
The lab where Dixon works studies food systems in the deep ocean. Algae and plants use photosynthesis(光合作用)to turn sunlight into food. Animals eat those plants and algae to survive. Then larger animals may eat those animals. But sunlight doesn’t reach the deep ocean’s bottom. So other pathways are essential. These pathways include whale falls and other dead bodies. The scientists wondered how alligator falls fit into a larger food web. To find out, they submerged them.
Studying alligator falls, Dixon says, could help show how life evolved(进化)in the deep sea. It’s possible that the creatures found on whale falls and other falls today, Dixon says, evolved from creatures that hundreds of millions of years ago would have devoured plesiosaur (蛇颈龙) falls.
1. What do we know about Osedax worms?| A．They depend on bones for survival. | B．They are newly evolved creatures. |
| C．They are used to clean the ocean. | D．They prefer to live with whale falls. |
| A．To analyze the ocean food chain. | B．To observe how deep they would fall. |
| C．To research on the structure of alligators. | D．To learn what would feed on their bones. |
| A．Considered. | B．Required. | C．Sank. | D．Buried. |
| A．The pressure on creatures to have food. |
| B．The importance of studying falls in the ocean. |
| C．The consequence of consuming plesiosaur falls. |
| D．The influence of plesiosaur falls on the ecosystem. |
3 . Ecofriendly Vauban, lied in the southwest part of Germany, has everything—treelined streets, perfect houses—but it's missing one urban feature of the last 100 years or so: the car. And Vauban residents don't mind one bit. Vauban doesn't ban cars entirely. Rather, it just tries to reduce the use of cars by creating "parkingfree" and "carfree" living. In Vauban, parking spots are a nono private property. Cars can only be parked in public parking lots, so living without a car saves residents the cost of parking in the public lot. Cars also are prevented from using certain roads and must stick to strict speed limits. With these limitations, fewer than 20 percent of residents own cars. And now, with a population of 5,500, it's attracting attention from around the world. Can an ecofriendly city like Vauban be a model for Americans to stop their over reliance on the cars?
Sometimes when I watch a news report what's in the back of my mind is what isn't being reported or stressed. While this ecofriendly city is inspiring in that it shows residents getting exercise and fresh air through the majority use of bicycles, as well as good oldfashioned walking, common sense would tell you that even for a place like Vauban, Germany, it owes its existence to the cars.
Do you think that bicycles were able to transport all the construction materials that were needed to build and maintain the ecofriendly homes and businesses in Vauban? It took cars to help build this city. It's one of the paradoxes of life that sometimes in order to get away from relying on something like the car, you actually have to rely on that very thing at the beginning and into the foreseeable future to some degree.
I myself haven't owned a car for more than 14 years, and mostly get around town running, walking, or using public transportation. There are times I wish I had one, since it would make many things easier, but overall I'm glad not to have to deal with the headaches of owning a car, which caused me to get rid of it in the first place. And all the walking and running has helped to keep me fit and healthy. To get even close to being like ecofriendly Vauban, Americans will need to absolutely change the way they live. Commuting (乘车上下班) patterns will have to change, public transportation will have to be invested in, and so on. And though ending our love affair with the car will be impossible during my lifetime, we may at least start to see more Vaubanlike areas in the USA.
We can hope that Americans will consider using their feet more to get around, cutting down on pollution, and giving themselves some more exercise.
1. Why don't over 80% of the residents in Vauban own car?| A．The streets there are very narrow. |
| B．There are many limitations on the use of cars. |
| C．The government limits the number of cars. |
| D．Most cars belong to their public property. |
| A．opposite things |
| B．big shortcomings |
| C．great strengths |
| D．firm bases |
| A．Curious. |
| B．Proud. |
| C．Grateful. |
| D．Regretful. |
| A．Not mentioned. |
| B．They are not ecofriendly. |
| C．They have too many cars. |
| D．They work hard. |
Wind, rain, and ice have been shaping Brimham Rocks for the last 320 million years. It has even become a National Trust landmark and an Area of Outstanding Natural Beauty,
At around 8：45 pm on Friday, June l, a group of five young people
The incident has caused huge damage to both the rock and the cliff face, and those teens put
Helen Clarke, from the National Trust,
While everyone is angry with the teens on social media, the police are asking for help.
5 . More than one million single-use straws (吸管), most of them plastic, are used in the United States each day. They end up in waterways, harm sea animals, and break down into micro-plastics. Quantities of places have passed plastic-straw bans as a way to start handling the global plastic waste problem.
Straw materials: advantages and disadvantages
1. Metal
Made of stainless steel, aluminum, or even titanium, metal straws have become popular. They draw some criticism for having a metallic taste and conducting heat from a hot drink, but they’re strong and can be reused.
2. Paper
Paper drinking straws, which date from the late 1800s, often absorb liquid over time and can leave a taste or fibers in drinks. They’re the most popular throwaway choice in places with plastic-straw bans.
3. Glass
Though glass straws may be more breakable and thus less portable than reusable straws of other materials, they hold up well to washing and reuse. Some straws are made to look artistic, with colors and blown-glass designs.
4. Bamboo
This natural material can be sustainably produced and is a plant-based replacement of plastic straws. Bamboo straws are easily disposed of and turned into fertilizer. They are reusable but can be hard to clean completely and may absorb flavors.
1. What is the major problem with plastic straws?| A．Function. | B．Flavor. |
| C．Weight. | D．Pollution. |
| A．Metal straw. | B．Paper straw. |
| C．Glass straw. | D．Bamboo straw. |
| A．It can become fertilizer. | B．It is easy to clean. |
| C．It is portable and bendable. | D．It has different designs. |
6 . On a day in Arkansas, some fishermen saw a bear cub（幼兽）in a tree. As hours went by, its mother didn’t return. So they called wildlife biologist（生物学家） Eastridge.
The bear cub was sick and hungry, weighing only 5 pounds and with his eyes not completely open. Eastridge called Lisa Stewart, who works at Appalachian Bear Rescue in Tennessee. Stewart always makes room for a new cub.
She named the bear Miracle because she thought it was a miracle that he had survived! As soon as she could, she stopped having contact with the cub so he would not become too used to humans. When the cub arrived, Stewart cleaned his eyes and put him in a house alone. Since Miracle was already 5 months old. Stewart gave him bowls of food and another bowl of a special formula(配方奶粉)， similar to a bear mother’s milk. Sometimes, Miracle would reach his head out of his house and take some formula or food. But he wasn’t eating too much.
Miracle was too weak to be with other bears. So Stewart gave him a toy bear named Buddy. He took it into his house and covered it with straw(稻草). He fed Buddy, too. Stewart often found the toy covered in formula and berries and its ears full of apple chunks. Now that Miracle had Buddy, he came out of his house more often and wanted to eat.
After two months, Stewart introduced Miracle to other bears so they could learn from one another. She avoided any direct contact with Miracle and the other bears. Stewart wanted to make sure they stayed afraid of humans so they could go back into the wild again. She always hid behind a fence(栅栏) and threw food over the top secretly. The bears hunted for this food as they would soon do in the wild.
Five months later, Rick Eastridge returned to pick up a healthy 90-pound Miracle and another bear from Arkansas named Rocky. Eastridge loaded the bears into boxes on his truck and transported them back to the wild. As soon as the bear boxes were opened, the two cubs ran for the woods─where they belonged.
1. What did Stewart do shortly after the cub arrived?| A．She helped him eat food. | B．She contacted with him. |
| C．She settled him down. | D．She named him Miracle. |
| A．remind him not to waste his food | B．kill his lonely time in his house. |
| C．develop his skills of making friends | D．rid Miracle of its fear of humans |
| A．Because he could learn how to find food in the wild. |
| B．Because he was too weak to be frightened by humans. |
| C．Because a good relationship could be developed. |
| D．Because she didn’t want to disturb his peaceful life. |
| A．An Unusual Bear | B．The Growth of Miracle |
| C．Rescuing Miracle | D．Contacting Miracle |
