1 . Open an app at your smart phone and scan the code bar on the garbage can. When you throw garbage into the garbage can, it will show the weight of the garbage and the points you can get from doing so.     1     It will become more popular in the future. Yes, we are talking about the smart garbage can.

    2     The environmental problems have become constant headaches in the development of those cities. Encouraging garbage classification has become an effective way.

In some cities, a variety of multifunctional smart garbage cans are being put into use. In Beijing, for example, a smart garbage can is equipped with an LED screen, which not only shows national policies on garbage classification but also shows the correct steps for garbage sorting. It can also calculate the weight of the garbage and the accumulated points one can get. They can be traded for some articles of daily use.     3     Its body is actually a screen. It is equipped with some Internal sensors. When people throw garbage into it, the internal sensors can automatically tell the types of the garbage. Meanwhile, people can see how to deal with them.     4    

Garbage disposal is a small issue that involves everybody each day. However, it is also a big issue.    5     With smart garbage cans in our daily life, the idea of garbage sorting will become more established. Our dream of building a greener and more beautiful China will come true so long as we start to make small changes right now.

A．Garbage sorting has been a new fashion.

B．Another kind of garbage can is even smarter.

C．It is no wonder that residents cheered for their presence.

D．Such a way of handling garbage has appeared in some cities.

E．It will affect China’s transformation towards green development.

F．Over 200 million tons of garbage is produced each year in some cities.

G．The good habit of garbage classification can improve the living environment.

2 . As global warming becomes more and more serious, each one of us must take action to help.

First, diet.

Changing what you eat could easily have a significant effect because animal agriculture creates about 14% of the world's greenhouse gas emissions (排放).     1     Each kilo consumed produces 26.5 kilos of CO2 emissions, five times more than chicken or turkey. Changing to plant-based diets could reduce emissions greatly.

Second, travel.

Nearly all transport relies on fossil fuels. In the US, driving one mile in an average 2016 car emits 404 grams of CO2 equivalents per mile. But taking nearly any other means of transport will reduce CO2 emissions.     2    

Third, energy.

    3     But a few quick changes can make a difference. Switch from incandescent (白炽灯) lights to LEDs. They use a quarter of the energy and last 25 times longer. And taking for showers, the average water heater is set to 140 degrees Fahrenheit. But bringing it down by 20 degrees can save 250 kilograms of CO2.

Fourth, waste.

Think before you buy. The fashion industry creates about 10% of global greenhouse emissions and consumes more energy than flight and shipping combined.     4     If you' re buying food, bring your own containers and just get the amount you need.

Last but not least, plant a garden.

Plant a garden instead of building a yard out of cement (水泥), the production of which creates 8% of global CO2 emissions a year.     5    

So from a burger to a cyclist, no one thing will have a big influence, but lots of little things can.

A．Almost every household appliance needs it.

B．When you do make a purchase, try to buy it in large quantity.

C．Planting a garden helps reduce CO2 emissions and produce oxygen.

D．Each of us contributes a particular amount of CO2 into the atmosphere.

E．As we all know, the environment around us is getting worse and worse.

F．After walking, cycling is the best choice because it almost has no emissions.

G．In 2017, beef was found to be one of the most damaging foods to the climate.

3 . 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, 并将答案填写在答题卡上。

Elephants in the Reteti Elephant Sanctuary (禁猎区) in northern Kenya are being fed goat milk. Workers there say the elephants enjoy drinking goat milk. They say the milk may be     1     (healthy) for them than other choice.

The sanctuary had been using powdered baby milk     2     (feed) the young animals it cared for. But it decided to test goat milk,     3     costs less and is locally available.

The sanctuary rescues young elephants     4     (find) alone in the wild and cares for them. It is not until they are old enough     5     they will be returned to the wild. Dr. Steven Chege is the sanctuary’s medical advisor. He says goat milk seems to be very good for the     6     (survive) and health of baby elephants.

Chege says goat milk is helpful because it contains a different kind of “highly digestible protein” that powdered baby milk lacks. This results in fewer stomach     7     (problem) for the young elephants.

Liwana Lenakukunyia is one of many goat farmers     8     (sell) milk to the sanctuary. She says she’s happy to get new earning and that many of the farmers who now earn money     9     (be) women. “Since we started milking goats and selling milk to the sanctuary,     10     least we have our own cash to feed our family with,” she said.

4 . There are so many dogs who are stuck in shelters or in foster care(寄养照管)and that are looking for a forever home.

Don’t Let Dogs Always Be Outside

Owners should avoid leaving their dogs outside for all hours for several reasons. Staying out in the sun for too long can cause them to get thirsty.     1     because it leaves them feeling severely uncomfortable. A good fix is to install a dog door, so your dog can choose if they want to be outside or inside.

Accept Their Personality Changes

Some dog owners may not realize that it’s common for dogs’ personalities to change over time. They may have been a friendly, energetic puppy and grow up to be a shy dog who doesn’t like being around others.     2    , avoid blaming them. Owners can’t change their dogs overnight and it can sometimes be impossible to alter their personalities to make them someone they’re not.     3    , and seek a professional to find out if it’s possible to avoid any harmful behavior.

Try Not to Push Them over the Edge

Owners need to pay attention to signs their dogs may show if they are scared and take care of the situation accordingly.     4    . Instances where this may occur are through training, being around new people or animals, or going for a ride in the car.

Do Not Leave Your Dog in the Car

Dogs should never be left in the car alone, especially with the windows rolled up.     5    , he will be charged with animal cruelty. This is because dogs can get sick and even suffer fatal consequences due to being left in either a very hot or cold car. Animal safety experts recommend taking action if you see an animal by itself in a car.

A．They are in some kind of trouble

B．It’s best to be patient with these changes

C．If their personality changes for the worse

D．Cold and rainy weather is not ideal for dogs

E．If the owner leaves pets unattended in a parked car

F．This means not pushing them over the edge if they aren’t ready

G．There’s a limit to how much time they should be spending outside

5 . Every year, as many as 50, 000 elephants in Africa are killed illegally for their tusks (象牙). Now scientists have improved DNA methods that allow them to match up elephant tusks, and help track down criminals that are selling them.

Even though it’s against the law, African elephants have long been killed by criminals for their tusks. Other people, called “traffickers”, buy the tusks and transport them out of the country on a ship. The traffickers re-sell the tusks for even more money, usually in Asia. Elephant tusks can sell for about $1, 000 a kilogram.

In the past, it was hard to catch the criminals. Usually by the time the dead animals were found, the illegal hunters had been far away. And when traffickers were caught with elephant tusks, it was impossible to say where the tusks came from. Traffickers usually hide them in tricky ways inside shipments of other products. That means that only about 10% of tusks from illegally killed elephants are ever found.

Several years ago, scientists led by Dr. Samuel Wasser figured out a new way to solve the problem. Using elephant waste, they built a list of the DNA of almost all elephants in Africa.

Now when elephant tusks are found on a ship in another country, DNA tests can show where they came from. This information can trigger quick action in the country where the animals were killed. It can also help the police discover patterns in the ways the illegal hunters and traffickers work.

Dr. Wasser is hopeful that the method of using DNA information from elephants to track illegally killed wildlife will soon be adopted to help protect other kinds of animals and break up more criminal groups.

1. Why do scientists use DNA information from elephants?

A．To improve the health of elephant tusks.

B．To keep track of the illegal dealers.

C．To protect elephants against natural disasters.

D．To research into elephants’ habits.

2. What may make illegally hunted elephant tusks hard to find?

A．The way they are transported.

B．The lack of tracking technology.

C．The difficulty in catching criminals.

D．The various tricks of illegal hunters.

3. What does the underlined word “trigger” in paragraph 5 probably mean?

A．start with

B．result from

C．hold back

D．lead to

4. Which of the following reflects Dr. Wasser’s opinion about the DNA method?

A．It can make all criminals have nowhere to hide.

B．It can scare away potential illegal hunters.

C．It can be widely used in wildlife protection.

D．It can make elephant tusk sales unprofitable.

6 . A WeChat mini-program for the Beijing 2022 Winter Olympic Games was officially launched on July 2.     1     And it will also change their low-carbon behaviors such as walking, bike riding, as well as bus and subway taking, into “carbon points” in their accounts, which can be exchanged for some awards.

    2     For example, a user can get 0.02 carbon points per step, up to 200 points per day, 174 points for participating in the “clear your plate” campaign each time, and 209 points for taking a bus. Quantifying (量化) low-carbon activities with carbon points enables the public to gradually develop a green and low-carbon lifestyle.     3    

To actively respond to the global climate change, reducing carbon emission and achieving carbon neutrality (碳中和) has become a must in major international sports events.     4     The Beijing 2022 Winter Olympic Games made an even bolder move by launching a nationwide low-carbon campaign and developing a mini-program for the public to help reduce carbon emission.

The Beijing 2022 has always remained committed to being green, low-carbon and sustainable, from its bidding to preparation.     5     All venues are constructed under the national green building standards.

A．It will be popular among many international experts.

B．It will open an individual carbon account for each user.

C．More importantly, it contributes to a greener sport event.

D．Different amounts of carbon points are based on how low-carbon the activities are.

E．It has continuously made breakthroughs in low-carbon energy, venues, and transportation.

F．Carbon neutrality refers to taking steps to balance carbon emissions from human activities.

G．In the past, major sports events usually achieved this through forestry management, and renewable projects.

7 . A mysterious illness is turning some black bears friendly and unafraid of humans, among other strange symptoms.

Researchers believe the illness, which young bears around a year old appear to suffer from, is a kind of encephalitis (脑炎), according to a news report by the California Department of Fish and Wildlife late last month. Since 2014, a handful of bears in Nevada and Caledonia have shown signs of the condition, and four California bears were confirmed to have it last year. One of them walked into a school and entered a classroom where she sat down among the children, behaving very much like a friendly dog.

The encephalitis has other serious effects on the nervous system of the bears, including tremble, head tilts and seizures (癫痫). Affected bears also tend to be seriously underweight. One female bear, observed in February picking up an apple and eating it among humans in a yard, weighed only 21 pounds when she should have been around 80 pounds. She was also covered in ticks (扁虱), walked strangely and was ultimately euthanized (安乐死).

It’s still unclear exactly what's causing the brain illness. But in the course of studying the phenomenon, scientists have identified five previously unknown viruses in the affected bears.

Bears suffering from encephalitis typically have to be euthanized. Their symptoms make them unequipped to survive in the wild, and those placed in zoos or shelters can become a huge burden due to the lifelong medical care they need.

Two bears exhibiting neurological (神经系统的) issues in recent years, however, were able to find new homes. One, now named Elinor, was brought to the Orange County Zoo. The other bear, who has become famous after being caught on camera sniffing a snowboarder and is now named Benji, lives at the San Diego Humane Society’s Ramona Wildlife Center. Last month, Benji celebrated his third birthday there with a cake made out of fruit and potatoes. Details are as follows.

1. Which of the following is uninvolved in the symptoms of the bears’ disease?

A．Serious weight loss.	B．Getting close to humans.
C．Some neurological issues.	D．Desiring to learn knowledge.

2. What might cause the encephalitis of bears?

A．An environmental change.	B．A severe shortage of food.
C．Some unknown kinds of viruses.	D．The lack of necessary medical care.

3. What would the author probably discuss in the paragraph that follows?

A．Add some background knowledge.

B．Provide some advice for the readers.

C．Summarize the previous paragraphs.

D．Introduce some further information about Benji’s birthday.

4. What is the best title for the text?

A．Black Bears in Nevada and California

B．A Disease Making Bears Endangered

C．An Unknown Bear Species

D．Black Bears Getting Much Friendlier

8 . 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, 并将答案填写在答题卡上。

Antarctica is one of the hardest-to-reach places on Earth. But a recent report shows ships     1    (sail) to Antarctica have connections to ports around the world. That greatly raises the chance that plants or animals     2    the outside could invade (入侵) this protected area.

Invasive species are animals or plants that arrive in a place where they don’t normally live. When invasive species     3    (bring) to a new place, they can often spread quite quickly, which can force out other plants and animals that live there     4    (natural).

In other parts of the world, invasive sea animals and plants have caused trouble after     5    (they) arrival. They often came     6    (attach) to the outside of ships. The conditions in Antarctica are tough, and many animals could never live there. But scientists worry whether the species     7    live at the North Pole and are already used to extremely cold conditions could survive in Antarctica. As the oceans warm, even     8    (many) kinds of plants and animals may be able to survive there.

The report makes several     9    (suggestion) for improving the situation. One idea is for ships to be coated in a special covering that makes it hard for invasive species to stick to them. Ships without this kind of coating could be cleaned regularly. Moreover, countries could require ships to have an     10    (inspect) or some other proof that they aren’t carrying invasive species before they leave the port.

9 . 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。

World leaders at the 5th meeting of the United Nations Environment Assembly (UNEA) agreed that by 2024, they would create and sign a new treaty on plastics. The new treaty would create international laws     1     could help bring plastic waste under control.

Because plastic is useful for so many purposes, it has become a part of nearly all areas of our lives. It’s hard to look anywhere without finding dozens of     2     (object) made of plastic.

The United Nations Environment Program (UNEP) reports that     3     (current) 400 million tons of plastic is produced every year. By 2040, that number is predicted to double. And even though there’s a lot of talk about recycling, only 9% of all the plastic ever     4     ( produce) has been recycled.

Plastic gives off dangerous gases when it’s made and also when it’s burned or buried in the ground. Scientists say plastics are responsible     5     4.5% of the world’s greenhouse gases — the gases that are driving the climate crisis.

Plastic doesn’t “decompose (腐烂)” like natural materials. Instead, it just breaks into smaller and smaller pieces. And as the plastics     6     (fill) our world break down, they create     7     new problem — microplastics.

Microplastics are so tiny that     8     (they) existence is usually ignored. In the past few years, microplastics     9     (find) almost everywhere, from the North pole to Antarctica, from the top of the Earth’s     10     (high) mountain to the deepest point in the sea. They’ve even appeared in the bodies of animals including humans.

10 . Climate change is a global challenge. One way to fight it is by reducing the amount of carbon dioxide in the air. New research shows that trees planted in China have helped in this fight.

A recent study in the journal Nature shows that the amount of carbon dioxide absorbed (吸收) by new forests in two parts of China is more than we thought. These areas are in the northeastern Heilongjiang and Jilin provinces and the southwestern Yunnan and Guizhou provinces and Guangxi Zhuang autonomous region. They make up about 35 percent of China’s land-based (基于陆地的) carbon sinks (碳汇). A carbon sink is a natural area like a forest or ocean that absorbs more-carbon dioxide than it emits (排放). Carbon sinks help to reduce the amount of CO₂ in the atmosphere.

China’s goal is to peak (达到峰值) its CO₂ emissions (排放) before 2030 and reach carbon neutrality (中和) by 2060, Xinhua reported. Carbon neutrality refers to removing as much CO₂ as one puts into the air.

According to study co-author Yi Liu at the Chinese Academy of Sciences, “the afforestation activities described in our Nature paper will play a role in reaching that goal.”

1. A recent study in Nature shows that ________.

A．China has serious air pollution	B．China has planted the most trees in the world
C．China has fewer CO2 emissions now	D．China has planted fewer trees

2. According to Xinhua, China ________.

A．is the world’s largest emitter of CO2	B．will bring CO2 emissions down after 2030
C．will not release CO2 in the future	D．will reach carbon neutrality by 2030

3. Which of the following is NOT TRUE in the passage?

A．One way to fight climate is by reducing the amount of carbon dioxide in the air.

B．Trees planted in China have helped fight against climate change.

C．New forests in two parts of China absorbed more carbon dioxide than we thought.

D．35 percent of China’s land has been affected by CO2 emission.

4. What do we know from the story?

A．It takes a long time for carbon sinks to form.	B．Climate change is no longer a serious problem.
C．More trees will be planted in China in the future.	D．China has beaten climate change.