1 . Each year, the discovery of new shark species underlines how little we know about ocean biodiversity. In a recent report conducted by Sibert and Rubin, they reported an unexpected finding: a large-scale extinction of sharks in the pelagic ocean, the largest ecosystem on Earth, about 19 million years ago. Their discovery suggests that some extinctions in the open sea of the past may have been mysterious.

The study of Sibert and Rubin takes advantage of a system by using tiny, hard bits of shark skin and bony fish teeth that naturally fall from their bodies to the seafloor. These extremely small fossils provide a rich record of ancient oceanic sharks and their abundance for thousands of years. By studying fossils from many regions, the diversity patterns can give major insights into evolution (进化) of the open sea that would be otherwise unknown.

Sibert and Rubin quantified(量化)a past extinction of sharks, reporting a 90% decline in number and >70% drop in diversity. They found that nearer-shore sharks appear to survive, but migratory ones go extinct. The finding of this study is that sharks had undergone a widespread extinction that reorganized their communities from 16 million to 20 million years ago.

Sibert and Rubin narrowed the disappearance of sharks to a window of time under 100,000 years around 19 million years ago, but the causes of this event remain unclear. Because this time period does not stand out as a period of major climatic change, the authors do not attribute(归因于) environmental factors as an extinction driver. As for other causes, the loss of shark diversity is directly linked to overfishing.

The loss of sharks from the oceans has profound, complex, and unavoidable ecological consequences because their presence reflects the stability of marine ecosystems. Yet, one-quarter of the global diversity of sharks is currently threatened with extinction. Despite recent improvements in conservation actions, shark communities never recovered from a mysterious extinction event 19 million years ago; the ecological fate of what remains is now in our hands.

1. What did Sibert and Rubin find?

A．The negative impact of the extinction of sharks.

B．The mysterious reasons behind the disappearance of sharks.

C．The most recent advances in the study of the largest ecosystem.

D．The large-scale decline in the number of sharks about 19 million years ago.

2. How did Sibert and Rubin conduct their study?

A．By collecting and analyzing shark fossils worldwide.

B．By quantifying the movement of near-shore sharks.

C．By using a system to study the naturally fallen bits from sharks.

D．By keeping track of ancient oceanic sharks and their activities.

3. According to the passage, which of the following statement is true?

A．Overfishing is partly to blame for the loss of shark diversity.

B．The number of sharks has recovered to its previous level.

C．Scientist have figured out the exact causes of sharks’ extinction.

D．Sharks had undergone a widespread extinction due to the climate change.

4. Which of the following is the best title for the text?

A．Sharks: The Stories behind Them	B．Sharks: The Marine Masters
C．Sharks: Killers or Misunderstood?	D．Sharks: The Mysterious Extinction

2 . In the past few weeks, Richard Eckersley has noticed a change in the type of people who come into his shop. In 2017, the former Manchester United footballer set up Earth. Food. Love in Tones, Devon, with his wife, Nicola. It’s the UK’s first “zero waste” store—the food is in big jars and boxes and people bring their own containers. “A lot of new people are coming in-people who have not necessarily been interested in environmental issues before”, he says.

Recently, the government called for supermarkets to introduce plastic-free passageways. But Eckersley says many customers are already way ahead of politicians. He and Nicola have helped people set up similar stores in Wales, Birmingham, and Bristol. Ingrid Caldironi had a similar idea. She set up a plastic-free shop in London last year, which has been so popular that it is soon moving to a bigger site.

Eckersley and Caldironi are members of an anti-plastics movement in the UK that has been growing as a result of the BBC’s Blue Planet series and a general worry about the damage plastic is doing to the environment. But big supermarkets have so far not tried very hard to reduce their plastic waste. Sian Sutherland, founder of the movement “A Plastic Planet”, says, “The most exciting thing is that politicians and industry are no longer saying that recycling will solve the problem. Banning the use of plastic packaging for food and drink products is the only answer.” Walking down the passageways of the supermarket where everything from pizza to fresh fruit and vegetables is covered in plastic. Sutherland says immediate action is needed.

Plastic pollution is causing widespread global damage. More than one million plastic bottles are bought around the world every minute, and most end up in landfill or the sea. The contamination is so wide that tap water around the world also contains plastic.

1. What is special about Earth. Food. Love?

A．It gives away boxes of food.	B．It is a store without plastic bags.
C．It has few new customers.	D．It is the UK’s first supermarket.

2. What caused Caldironi’s shop to be relocated to a larger place?

A．Its popularity.

B．Its products.

C．Its profits.

D．Its similarity.

3. What does the underlined word “contamination” in last paragraph mean?

A．Pollution.

B．Acceptance.

C．Influence.

D．Application.

4. What is the text mainly about?

A．The impact of BBC’s Blue Planet series on anti-plastics movements.

B．Rising anti-plastics movement alongside increasing environmental concerns.

C．A guide to setting up plastic-free stores to promote recycling in the whole UK.

D．Richard Eckersley’s personal journey in waste reduction and pollution prevention.

3 . A new study from the University of Cambridge shows how small environmental changes can have great effects on human behavior. Even the rise of skateboarding is the result of the deep relationships between humans and the climate.

“To make connections between climate and society, we often look into the past, but as we go further back, the evidence gets thinner,” said lead author Professor Büntgen. “We wanted to find a more modern example where we had lots of data to look at. That is how we began to study skateboarding.”

As was recorded, the prosperity (繁荣) of post-war America resulted in the building of more than 150,000 swimming pools in California during the 1960s. However, California suffered the greatest drought (旱灾) in the 1970s. The government’s water agencies responded by mandating strict cuts, including a ban stopping people from filling backyard swimming pools. As a result, many of these pools were empty, making them ideal playgrounds for freestyle skateboarders. Naturally, skateboarding exploded in popularity.

Büntgen said, “California used to be the center of US surf culture. The popularity and influence of surf culture was very important to the rise of skateboarding, which is why it could have only happened in California. You could have had the same drought, the same pools in somewhere like Phoenix, but since Phoenix doesn’t have a rich surf culture, professional skateboarding couldn’t have started there.”

With the rise of professional skateboarding came the industrial production of polyurethane (聚氨酯) wheels, which allowed skaters to make faster turns at higher speeds than they could with earlier steel wheels. All these factors made skateboarding more popular. Nowadays, it is a multibillion-dollar industry.

The example of California best shows that local climate change can have major effects on human society.

1. What is the finding of the new study?

A．Climate changes affect human behavior.

B．Popular games benefit greatly from droughts.

C．The environment changes people’s relationships.

D．Culture contributes to the industry development.

2. What does the underlined word “mandating” in Paragraph 3 mean?

A．Carrying out.

B．Counting on.

C．Sticking with.

D．Getting over.

3. According to Büntgen, what is a special factor promoting skateboarding in California?

A．Drought.

B．Location.

C．Swimming pools.

D．Surf culture.

4. From which section is this text most probably taken?

A．Society.

B．Health.

C．Education.

D．Business.

4 . WHY SHENNONGJIA?

As we know, in 2016, Shennongjia made it on to the UNESCO World Heritage List. But there are so many important places not yet on this list. So you might ask: why Shennongjia?

UNESCO awarded Shennongjia this status because it meets two criteria required by the list. It contains a naturally-balanced environment that allows the many and various species to live and prosper. It is also one of the rare locations in the world where scientists can observe in real time the ecological and biological processes that occur as the plants and animals develop and evolve.

For the first criterion, Shennongjia is apparently one of the most “complete” natural areas in the world. The region rises from about 400 metres to over 3, 000 metres above sealevel, giving it the name the “Roof of Central China”.

For the second criterion, we can see that Shennongjia has incredible biodiversity. Look at this slide. According to official statistics, over 3, 000 plant species have been recorded there. This represents more than ten percent of China’s total floral richness.

It is a challenge to look after so many species. In winter, scientists brave heavy snow and freezing temperatures to supply food to the Golden Snub-nosed Monkey. Thanks to their efforts, the monkey’s population has doubled since the 1980s.Their number reached over 1, 300 in 2015 and continues to grow.

But the most impressive aspect of Shennongjia is the local people, who take things from nature without causing damage. I visited a local village which is known for its home-made honey. What is special about the honey is that it is produced by the earliest species of Chinese bee. All of this explains why Shennongjia earned—and deserves—its place on the UNESCO World Heritage List, as well as highlighting how understanding, awareness and hard work have contributed towards protecting a unique and wonderful part of our natural world.

1. Why is Shennongjia included in the UNESCO World Heritage List?

A．Because its forests stretch on and on like great green seas.

B．Because it is the legendary father of Chinese herbal medicine.

C．Because it satisfies the two requirements for the status.

D．Because it has the mysterious creature called “Yeren”.

2. Shennongjia is also called the“          ”.

A．Roof of Central China	B．Roof of Northern China
C．Roof of Eastern China	D．Roof of Southern China

3. How does the author think of the scientists in Shennongjia?

A．Patient.

B．Careful.

C．Confident.

D．Hard-working.

4. According to the text, what impressed the author most?

A．A local village.	B．The local people.
C．Some special monkeys.	D．The wild bees.

5 . For the past two months, Mandy Chen, a second-year student at Beijing University of Technology, has been posting photos of herself to Taobao, posing with a reusable cup, climbing stairs and switching off lights.     1     Taobao’s Al algorithm (算法) calculates that Chen’s use of a reusable cup reduced 15.7 grams of carbon emissions (排放), while her choice to take the stairs instead of the lift resulted in a reduction of 19.5 grams.     2    

After seven days of posting her photos, Chen exchanged the points for a dozen of biodegradable rubbish bags from Taobao. Everyone can get an endless supply of free trash bags if they keep going, according to Chen.     3    

Chen uses Carbon88, a platform launched last August by Alibaba Group Holding, to help the more than 800 million users on Taobao adopt a sustainable lifestyle. The platform rewards users for over 70 low-carbon behaviours.     4     It also recommends products that it considers environmentally sustainable, and gives users points for buying them.

    5     “I didn’t know that my actions could produce such carbon reduction,” Chen said, “Now I feel good for what I’m doing to make this world a tiny bit better. We as a part of society can call for more systemic changes.”

A．It encourages them to reduce their carbon footprint.

B．And her efforts to save electricity prevented 65.50 grams.

C．It’s a valuable addition to current carbon-reduction policies.

D．Carbon reduction has helped increase Chen’s environmental awareness.

E．Within minutes, she receives a dozen points from the app as a reward.

F．They range from taking public transport to shopping of second-hand items.

G．She is now saving points for something better, like snacks and water bottles.

6 . The Yellow River is the cradle of China’s civilization. And flood control and prevention have always been key to the well-being of the people living along it. Now, scientists can better work on these issues by giving the river a digital twin.

The digital twin of the Yellow River uses various technologies, including big data, artificial intelligence, and the internet of things. Devices (设备) set up along the river collect and transmit information to the center. Based on the information, a 3D model of the river is presented on the computer screen. It’s like the Yellow River has a twin that reflects its real conditions.

One big breakthrough in the river’s digital governance (治理) is “smart stones”. According to Wang Qin, a lead researcher at the Information Center of Yellow River Henan Bureau, a smart stone is a water-proof stone-shaped device with chips, a battery, and a signal transmitter. They are buried in important dike (堤坝) locations to record and report the movement of dike stones. “Upon feeling movement of the dike stones, the smart stone sends an alarm to the center for quick response,” Wang said.

“In the past, researchers had to learn the conditions of the dike on the spot by themselves, putting their lives at risk,” said Zhao Xiao from the bureau. “Now the smart stones can do this for us, more safely, quickly, and accurately.”

And in the sky, drones (无人机) are flying. On the routes designed by engineers, the drones become expert patrollers (巡逻员) of the river, looking at its dikes and flood prevention projects. According to Shen Lin from the Yellow River Conservancy Commission, thanks to the drones, researchers at the command center can get first-hand photos and information. “Researchers then update the 3D model according to the changes the drones reported. The newly updated model helps us test our floodwater release plans in case we ever need to batten down the hatches (未雨绸缪), ”said Shen.

Under the water and up in the sky, intelligence systems are helping to protect the Yellow River Basin on all fronts. According to the Ministry of Water Resources, in the future, we can expect to see the construction of an even more comprehensive digital system for this important river.

1. What is the main purpose of creating a digital twin of the Yellow River?

A．To conduct historical research.

B．To create a virtual tourist attraction.

C．To raise public awareness of river protection.

D．To improve flood control and prevention efforts.

2. How do the smart stones contribute to the river’s digital governance?

A．They record water quality.

B．They improve the river’s beauty.

C．They monitor and report dike movements.

D．They serve as markers for important locations.

3. What is one of the functions of drones in the digital governance of the Yellow River?

A．Entertaining tourists.	B．Collecting information on dike conditions.
C．Patrolling and take wildlife photos.	D．Testing water quality.

4. What does the under lined word “comprehensive” in the last paragraph probably mean?

A．Complete.

B．Basic.

C．Beautiful.

D．Natural.

7 . What is currently the woman’s main problem?

A．Some people are coming onto her land.

B．An animal is damaging her plants.

C．People in the city are unfriendly to her.

8 . Germany’s top court (法院) has ruled that parts of the country’s 2019 climate action law must be changed because they don’t do a good job of protecting young people. Nine young people aged 15 to 24 took the government to court over the law. They said that the government’s failure to plan carefully was putting their future lives in danger.

The judges (法官) of Germany’s highest court said climate change will influence young people far more than adults. That’s because climate change will become more serious over time. As young people become adults, they’ll be left to deal with any problems that today’s adults don’t deal with.

In 2019, Germany passed a new law, promising that the country would be producing no more CO2 than the forest can take in by 2050. The law made a plan of action until 2030. But the law didn’t have any plans for climate actions that would be taken between 2031 and 2050.

The court has asked the German government to fix the law by the end of 2022. The climate law will now need to have a plan for the actions that will be taken after 2030.

The German government has said that it will quickly begin working to make the needed changes. One important part of high court decisions like this is that they act as guides or examples for future decisions. This means that in the future, Germany’s lawmakers will be more likely to think about the climate future of young people as they create their laws.

1. Why did the judges make such a decision?

A．They decided the new law made no sense.

B．They wanted to give the young more rights.

C．They focused more on the future of the young.

D．They thought it’s hard to solve climate change.

2. What did the nine young people feel displeased with about the government?

A．It failed to take action before 2030.

B．It was producing more and more CO2.

C．It refused to consider the young’s rights.

D．It didn’t plan the climate actions after 2030.

3. How will the German government do in the future?

A．It will make more decisions on climate change.

B．It will ask the young to help make climate laws.

C．It will consider the young when making climate laws.

D．It will encourage the young to protect the environment.

4. What did the nine young people’s action show?

A．They were brave and forward-looking enough.

B．They couldn’t bear the present climate change.

C．They wanted to take part in law-making.

D．They planned to work in the government.

9 . 听下面一段独白，回答以下小题。
1. What did researchers study in two tests?

A．The way of seagulls’ stealing food.

B．The effects of staring at seagulls.

C．The different food thieves.

2. What did one fourth of birds do with eye contact in the test?

A．They flew away immediately.

B．They stood still and looked at the food.

C．They made an attempt to steal food.

3. What did Madeleine think of seagulls?

A．They snatched food violently.

B．They stole food secretly.

C．They attacked people aggressively.

4. How do people stop seagulls stealing food effectively?

A．By feeding them first.

B．By setting a big trap.

C．By staring at them.

10 . 阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Each year more than 3 million people visit Rocky Mountain National Park, the third most-visited national park in the USA. Many of them arrive there by car, they drive along the Trail Ridge Road, which     1     (build) during the 1930s.

People are attracted by its scenery, hiking trails and wildlife. The hiking trails include    2     (challenge) difficult climbs    3     some of the high mountains and forest hikes     4    lead to one of the park’s waterfalls. They also include trails to blue lakes. The view of Longs Peak from its lakeside is the finest in the whole park. One of the most     5     (adventure) hikes in the park is the Continental Divide Loop. The 86-kilometer path cuts through valleys and past lakes and waterfalls. It takes most hikers at least six days    6     (complete).

Long hikes give visitors a chance to experience Rocky Mountain wildlife. Within the park     7     (be) hundreds of sheep as well as     8     small moose population. The park’s huge number of large animals makes     9     one of the best places in America for wildlife watching.

The     10     (explore) of the park could be enjoyable and unforgettable. You can explore it on foot, you can sleep under the stars, and you can sit by a clear quiet lake.