1 . Sports can help contribute to a healthy body and get you close to nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great impact on the environment.

    1     Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses(球场) in good condition.     2     For example, in the dry regions of Portugal and Spain, golf is often held, responsible for serious water shortage in some local areas.

There are many environment-friendly sports.     3     You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, it can also keep you fit.     4     Experts say that 20 minutes daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces.     5     And best of all, it’s free.

A．It will cost you a lot.

B．Some sports are resource-hungry.

C．This causes major environmental effects.

D．Power walking is one of them that you could take up today.

E．There is no special requirement for you to start your membership.

F．If you walk on a regular basis, it will benefit your heart and bones.

G．More and more people are concerned about environmental protection

2 . How does an ecosystem (生态系统) work? What makes the populations of different species the way they are? Why are there so many flies and so few wolves? To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats.

With such models, scientists have found out some key principles operating in food webs. Most food webs, for instance, consist of many weak links rather than a few strong ones. When a predator (掠食动物) always eats huge numbers of a single prey (猎物), the two species are strongly linked; when a predator lives on various species, they are weakly linked. Food webs may be dominated by many weak links because that arrangement is more stable over the long term. If a predator can eat several species, it can survive the extinction (灭绝) of one of them. And if a predator can move on to another species that is easier to find when a prey species becomes rare, the switch allows the original prey to recover. The weak links may thus keep species from driving one another to extinction.

Mathematical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems. In the 1960s, scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species—including species they did not directly attack.

And unplanned human activities have proved the idea of top-down control by top predators to be true. In the ocean, we fished for top predators such as cod on an industrial scale, while on land, we killed off large predators such as wolves. These actions have greatly affected the ecological balance.

Scientists have built an early-warning system based on mathematical models. Ideally, the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key, which scientists says because once ecosystems pass their tipping point (临界点), it is remarkably difficult for them to return.

1. What have scientists discovered with the help of mathematical models of food webs?

A．The living habits of species in food webs.

B．The rules governing food webs of the ecosystems.

C．The approaches to studying the species in the ecosystems.

D．The differences between weak and strong links in food webs.

2. A strong link is found between two species when a predator ______.

A．has a wide food choice	B．can easily find new prey
C．sticks to one prey species	D．can quickly move to another place

3. What will happen if the populations of top predators in a food web greatly decline?

A．The prey species they directly attack will die out.

B．The species they indirectly attack will turn into top predators.

C．The living environment of other species will remain unchanged.

D．The populations of other species will experience unexpected changes.

4. How does an early-warning system help us maintain the ecological balance?

A．By getting illegal practices under control.

B．By stopping us from killing large predators.

C．By bringing the broken-down ecosystems back to normal.

D．By signaling the urgent need for taking preventive action.

4 . A young Dutch inventor is widening his effort to cleanup floating (浮动的) plastic from the Pacific Ocean. He has developed a floating device (设备) to trap plastic waste moving into rivers before it reaches the oceans.

Boyan Slat was just 18 years old when he invented a system for catching waste in the ocean. He also founded an environmental group called “The Ocean Cleanup”. Its purpose is to develop the system. Last year, Slat showed the next step: a floating device which is called Interceptor. It removes plastic out of rivers. The device is powered by energy from the sun. “The 1,000 rivers are responsible for about 80% of plastic going into the world’s oceans,” said Slat. Three of the machines have already been used. Each machine costs about $775, 660, but the cost might drop as production increases.

Since they were used, the machines have been doing very well, collecting the plastic bottles and all the rubbish in the rivers. According to Slat, it is necessary to close “the tap”, which means preventing more plastic from reaching the ocean in the first place. He wanted to clean them all in the next five years. “This is not going to be easy, but if we do get this done, we could truly make our oceans again, ”said Slat.

The device is designed to be safe in rivers. Its nose is shaped to change directions to keep it away from larger floating things. It works by guiding plastic waste into an opening in the front of the device. The waste is then carried inside the machine where it is dropped into containers. The devices ends a text message to local operators that can come and empty it when it is full.

1. What do we know about Interceptor?

A．It needs solar power to work.	B．It is mainly used in the oceans.
C．It is being under test.	D．It can help sort waste.

2. What does “the tap” refer to in Paragraph 3?

A．The waste.	B．The oceans.
C．The machines.	D．The rivers.

3. What’s the function of the device’s nose?

A．To ensure the device’s safety.	B．To send operators text messages.
C．To empty the waste.	D．To serve as containers.

4. Where is the text most likely from?

A．A novel.	B．A magazine.
C．A diary.	D．A guidebook.

5 . How to Reduce Gift Wrap Waste

Wrapping paper may have “paper” in its name, but that doesn’t automatically mean it can be recycled.     1     Try these suggestions for cutting down the amount of wrapping paper you throw away.

Reuse what you have.     2     It’s estimated that the U.S. produces 4.6 million pounds of wrapping paper annually, and 2.3 million pounds of that stays in people’s homes, awaiting reuse.

Use different materials.     3     Select basic brown thick paper that can be made up with a bow, ribbons, leaves, pinecones or markers. Repurpose newspapers, old posters and children’s school artworks as wrapping paper. There are plenty of other eco-friendly alternatives to wrapping paper that are just delightful and celebratory.

    4     Use baskets, fabric, gift boxes or bags, tea towels, and more to contain and display your presents. Learn the Japanese art of wrapping, using beautiful knots(绳结) to fasten colorful, reusable fabrics in attractive ways. This way, you’ll have no wrapping paper waste to deal with.

Ask for better paper. Shops store what customers want, and recyclability should be a top priority, so let that be known when you’re out shopping. As explained by Simon Ellin, CEO of the Recycling Association, a trade body that represents about 90 waste management companies and paper merchants in the United Kingdom, “It’s a campaign we’ve been on all year — do you really need to design a non-paper wrapping paper? Make paper with recycling in mind!”     5    

A．Try zero waste.

B．Shop with that in mind, too.

C．You don’t have to choose shining paper to decorate a present.

D．In fact, many types of wrapping paper cannot due to their materials.

E．When wrapping paper is extremely thin, it has few good quality fibers for recycling.

F．Wrapping paper can be used many times if care is taken to unwrap it without tearing.

G．Having a mix of recyclable and non-recyclable papers is a real problem for companies.

6 . "When I was 16 years old, I was diving in Greece, but I was disappointed because I saw more plastic bags than fish.” These are the words of Boyan Slat, an engineer who designed the world's first ocean plastic cleanup system.

Every year, more than 8 million tons of plastics end up in our oceans, according to the UN Environment Programme. It is predicted that the weight of ocean plastics will match the weight of all the fish in our oceans by 2050. To prevent this from happening, in 2013 Slat created the Ocean Cleanup, an environmental non¬governmental organization, and put his plan for an ocean cleanup device into action.

After years of research and develop¬ment in the Netherlands, a device called System 001/B successfully started gathering plastics on October 2, 2019. The device uses a 600-meter-long C-shaped tube to gather all the floating rubbish. Unlike other cleanup methods, the system floats freely according to the direction of the waves, which allows waste to flow into and stay within the device. A sea anchor is attached to either end. This slows down the system as it floats through the water and allows the faster-moving rubbish, carried by the waves, to flow into its mouth. System 001/B can also collect waste below the surface using a 3-meter-deep skirt（挡板）attached to the end. After being gathered, the trash will be dragged back to shore by boat and recycled.

Right now, the system operates in the Great Pacific Garbage Patch, an area that is 3 times the size of France. Once operational, the Ocean Cleanup expects a full fleet to be able to clear 50% of the Great Pacific Garbage Patch in 5 years.

"It remains to be seen whether this dream will become a reality, but it is undeniable that humanity must work together to reduce our plastic use and repair the damage our waste has caused," Slat said. "We are starting to see a young generation that gets it and is excited about a sustainable （可持续的）future, but the question still comes down to: Are we going fast enough, and how much damage will have been done before we get there?"

1. The underlined word “match” in Paragraph 2 probably means “_________”.

A．compare	B．equal
C．measure	D．cover

2. Why did Boyan Slat create the Ocean Cleanup?

A．To collect ocean plastic waste.

B．To help to invent System 001/B.

C．To protect the living environment of fish.

D．To do research on the ocean environment.

3. What can we know about System 001/B?

A．It can collect and recycle garbage at the same time.

B．It can only gather ocean waste which floats on the water.

C．It aims to clear up the Great Pacific Garbage Patch in five years.

D．It is an ocean-cleaning device which has already been put to use.

4. What does Slat want to tell us according to the last paragraph?

A．Young generations care less about the environment.

B．The future ecology of the oceans is deeply worrying.

C．People should work hard to decrease plastic pollution.

D．It's quite difficult to repair the damage to the environment.

7 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

There     1     (be) no lights in sight but the night sky glowed (发出) a dusky yellow, because the Amazon was burning. The yellow flames engulfed (吞噬) trees     2     lit up the sky. During the day, the sunshine was blocked     3     thick smoke. So far, the fire     4     (put) out.

The government has recorded 72, 843 fires. The fire is just one of     5     (they) in the Amazon, the world’s     6     (large) rainforest and a fighter against climate change. According to Brazil’s space research agency INPE, the wildfire has decreased by 17 percent so far this year compared to the same period in 2018.

Environmental     7     (group)said the policies of the government encouraged deforestation (采伐森林) of the Amazon,    8     led to more fires. But the government posted a report and wanted     9     (argue) against that. The government claimed that non-governmental organizations     10     (angry) set fire to the forest after it cut their funding.

8 . Let's take a minute to think about the water we use. The human body is 60% water and we need to drink lots of water to be healthy. When we are thirsty we just go to the kitchen and fill a glass with clean water.

    1    For example, farmers, who produce the food we eat, use water to make the plants grow. When we turn on a light or switch on a TV or a computer we use energy and we need water to produce this energy.

The truth is that we are lucky enough to have clean water whenever we want，but this is not the case for many people around the world.    2    That's around one in 10 people in the world. If we drink dirty water，we can catch diseases from the bacteria and become ill. Every year over 500，000 children die from diarrhea(腹泻)from dirty water. That's around 1，400 children every day！Also，in some countries children walk many kilometres every day to get water.    3    Therefore，they don't have time to learn how to read or write and don't get an education.

    4    On this day every year，countries around the world hold events to educate people about the problems of dirty water and that clean water is something that everyone should have around the world. At one school in the UK，children between the ages of 10 and 15 walk 6km with six litres of water.    5    People give them money to do this and all the money helps get clean water to as many people as possible around the world.

A．We use water indirectly too.

B．Every system in our body depends on water to function.

C．It is to inspire people to learn more about water-related problems

D．If children walk many hours a day to get water，they can't go to school.

E．Did you know that around 750 million people do not have clean water to drink？

F．In 1993 the United Nations decided that March 22nd is the World Day for Water.

G．In this way，they know how it feels to walk a long distance carrying heavy bottles.

9 . The Manneken Pis is one of Brussels’ most popular tourist attractions. It has been peeing (撒尿) fresh water into a fountain in the Belgian capital since the 17th century. Now, the peeing boy has finally become environmentally friendly.

To everyone’s surprise, the famous statue used to waste 1,000 to 2,500 liters of drinking water a day. He peed water directly into the city’s sewers (下水道).

Energy engineer Regis Callens found this waste after fixing a water meter (水量计) in the statue. If his calculation is correct, then the peeing boy has wasted more than 250 million liters of water over the last 400 years.

As a result of this finding, a new system for delivering the water back to the naughty boy was created. Now he will no longer waste clean drinking water. Instead, he will use water recycled from a closed circuit (闭合回路). That means the water he pees out will be used again in an almost endless cycle.

The solution came out during the Brussels Water Week. A local official said, “We will also set up the system in schools and sports centers. We should set an example. We will encourage everyone in Brussels to pay attention to their water consumption.”

The Manneken Pis is a copy of the 1619 original, which is in a nearby museum. He is often dressed up in different costumes throughout the year to celebrate festivals and special events.

1. What wasn’t expected by the public according to the text?

A．The Manneken Pis was environmentally unfriendly.

B．The calculation of Regis Callens was not correct.

C．The system was created to send water back to the boy.

D．The city’s sewers were blocked because of the statue.

2. What can we learn from the words of the local official in Paragraph 5?

A．The solution was useful to local people.

B．Water waste will become more serious.

C．Citizens are encouraged to protect the statue.

D．The system will be used widely in the future.

3. Which one can be the best title of the text?

A．A Popular Tourist Attraction	B．A Water-saving Statue
C．A Water Meter in the Statue	D．A Solution to Water Waste

10 . The early life of the green sea turtle (海龟) is full of danger. Only one in 1,000 baby sea turtles survive to adulthood (成年). From its home in the sand, it breaks its egg with an egg tooth. Its mother is not there to help it. Instead, it is greeted by crabs, coyotes, and dogs waiting to eat it for dinner. To survive, the baby turtle must hide in the sand until night. Then, it moves slowly to the sea.

The small turtle must swim hard to reach the ocean waters. In the sea, it tries hard to find food. It must also keep itself from being food for fish.

As dangerous as the sea turtle’s life is in the natural world, its most dangerous enemies are humans. The rubbish left by humans in the ocean causes problems for the small green sea turtle. A little turtle might eat a piece of plastic (塑料) in the sea. It might also eat oil on the ocean’s surface. Young turtles also get caught in fishing nets. There are laws against hunting sea turtles. Still, many are hunted, both for their meat and for their shells (壳). All of these dangers must be prevented.

Sea turtles that do survive to grow into adulthood go through many changes. For example, adult green sea turtles weigh about 500 pounds. They stop eating jellyfish and other meat and eat only plants. And they may plan a trip to go back home again. A mother sea turtle goes back to the beach where she was born. This is the only place where she will lay eggs. Even if it has been forty years since she was a baby, she always knows her way back home.

1. Why do baby turtles move to the sea at night?

A．They dislike sunshine.

B．They prefer lower temperatures.

C．They can find food easily then.

D．They need to avoid enemies.

2. What does the author think of the young turtles in Paragraph 3?

A．Pitiful.	B．Careless.
C．Interesting.	D．Courageous.

3. What can we learn about sea turtles?

A．They mainly feed on fish and meat.

B．They always produce eggs at their birthplaces.

C．They can live for around forty years.

D．They visit their beach homes several times a year.

4. What is the text mainly about?

A．The homes of green sea turtles.

B．How sea turtles find their food.

C．The dangers faced by sea turtles.

D．How young turtles become adults.