1 . 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。

Imperial Mountain Resort in Chengde used to be the resort of emperors of Qing Dynasty. Situated in the city of Chengde in northeastern Hebei Province, the resort is     1     (convenient) accessible by either train or long-distance bus. And the resort,     2     constructions started in 1703 and took 89 years to complete, is regarded as one of China’s four famous gardens.

Surrounded by lakes, forest and mountains, it is China’s     3     (large) existing imperial garden and the former summer capital of the Qing Dynasty,     4     (cover) an area of 5.64 million square meters. The size of Chengde Summer Resort is as big as that of the Forbidden City and the Summer Palace     5     (combine). The 10-km-long wall around it winds its way through plains and high mountains     6     the Great Wall.

The resort and the 12 Buddhist temples at its periphery (外围) were built during the Qing Dynasty. It served as the second political center of the Qing imperial court     7     the emperors of the early Qing Dynasty often spent their summers there, conducting state     8     (affair) and engaging in important political activities. The resort and its outer temples and palaces have made Chengde     9     famous historical and cultural city, and one of China’s leading scenic spots. The Imperial Resort     10     (list) in the directory of the world’s cultural heritages in 1994.

2 . When the Great Backyard Bird Count (GBBC) began last Friday, Steve and Janet Kistler of Hart County, Kentucky, joined in. They’ve done so every year since the now-global tradition began 25 years ago.

For Moira Dalibor, who teaches math at a school, this was the first count. She led a group of students and parents to an arboretum (植物园) for an exercise in data-gathering. They were among hundreds of thousands of people around the world counting and recording over four days. Last year, about 385,000 people from 192 countries took part in the GBBC.

This global data goes into the eBird database used by scientists for research on bird populations, which have declined sharply overall in past decades. It’s part of a rise in “citizen science” projects in which volunteers collect data about the natural world for use by researchers.

Many bird-watchers use eBird year-round, and it has collected huge amounts of data — often between 1 million and 2 million bird checklists a month from around the world in the past couple of years, says Becca Rodomsky-Bish, the project’s leader at the Cornell Lab of Ornithology, in Ithaca, New York. “Observing birds is a good way to connect with the natural world. Birds are everywhere. You don’t have to leave your house. They will come. And they’re charismatic because they’re fun and interesting to watch.”

This is how it works: Participants watch birds, whether that means looking out of the window for 15 minutes or taking a longer trip to a nature area. Organizers recommend the Merlin bird ID app to distinguish birds by size, shape, song or other characteristics. Many participants also carry field guides and binoculars (双筒望远镜) along with their phones. They then enter the findings into the eBird app. Those numbers help researchers track the ups and downs of various species, which then help determine the direction of conservation efforts.

Dalibor prepared her classes with information about local species and practiced with the Merlin app. The kids recorded bird sightings with pencils and drawing boards, and parent volunteers entered those numbers on phones.

1. Why did Dalibor lead her students to an arboretum?

A．To do exercise for health.	B．To observe different plants.
C．To practice their math skills.	D．To collect information about birds.

2. What does the underlined word “charismatic” in paragraph 4 probably mean?

A．Attractive.

B．Beautiful.

C．Rare.

D．Shy.

3. What can people use the Merlin bird ID app to do?

A．To record their findings.	B．To identify different birds.
C．To help determine the birds’ habitat.	D．To track the ups and downs of various species.

4. What’s the best title of the text?

A．Great Backyard Bird Count: a strange activity

B．Watching birds contributes to students’ education

C．Moira Dalibor: a pioneer and responsible teacher

D．Great Backyard Bird Count shows power of citizen science

3 . 阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。

Ken Scott kicked of the covers and leapt out of bed at his home in the Rocky Mountain town of Mullan,Idaho.It was 6 a.m.on January 7, 2020, and he was on a mission: He’d just heard on the radio that the nearby Silver Mountain Resort had been blessed with nearly a foot and a half of new snow. As a ski addict who’d worked in the industry for the past 30 years as a ski patroller (滑雪巡逻员)and equipment salesperson, he didn’t want to miss this perfect skiing chance. These conditions are what skiers live for-even experienced and skilled as Scott, who, at 55, still skied 100 days a year.

When Scott reached Silver Mountain’s locker room, he ran into his friend Warren, 58, a former ski instructor who had also been a regular on these slopes for more than two decades.

“Can you believe it?” he said as they changed into their boots. “Sixteen inches! Are you ready?”

For the next hour, the pair skied on various runs under a lightly gloomy sky, making fresh tracks. They were both in a playful mood. Finally, they reached 16-to-1, an expert-level trail, which was now open. It had been closed all season over concerns that skiers might cause an avalanche (雪崩). But that morning, patrollers had cleared loose snow on the peak, reducing the chance of a snowslide.

“What do you think?” asked Warren.

“Let’s go for it!” Scott replied.

When they reached the top of 16-to-1, Warren excitedly looked back at Scott. The huge, toothy grin on his bearded face was what he needed. He pointed his skis downhill and took off. So thrilled were they that they isolated everything around them. Flying on the trail, despite the biting wind, their hearts burnt with passion for this great skiing. Whoomph! A sudden roar from behind nearly deafened them.

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。

In a second, they realized what was happening.

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“Bring help! Ken was missing,” Warren said anxiously on the phone.

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4 . “A beautiful field of flowers can be a rather noisy place. It’s just that we can’t hear the sounds.” Scientists at Tel Aviv University have conducted a six-year experiment, proving that plants make noise in certain stressful situations.

Plants produce a high frequency (频率) clicking sound, and when short of water, or damaged, the clicks become far more regular. They also made different sounds, depending on whether they were thirsty or injured. “Each plant and each type of stress is related to a specific sound,” said Professor Lilach Hadany, who led the research study.

Focusing particularly on tomatoes, wheat and corn, the plants were placed in a soundproof(隔音的)room and recorded by microphones. Some plants were starved of water, others cut, and a control group was left undamaged. The researchers used an algorithm (算法) to separate the noises, suecessfully telling the difference between the sounds depending on whether they were dry or cut. The algorithm did this in a greenhouse setting which included far more surrounding sounds, but it was still able to recognize the particular cries for help of the plants.

On average, the human ear can hear sounds up to around 20kHz, while the sounds produced by plants are in the 40-80kHz region, far beyond our hearing. “The sounds made by plants can’t be heard by humans but can probably be heard by various animals, such as bats, mice and insects,” Hadany tells us. Though this has yet to be proven, it’s possible that these creatures use this information to choose which plants to eat.

A study led by Reda Hassanien of China Agriculural University in Beijing years ago, also proved that plants reacted to sound waves, with some plants greatly increasing their yield. While evidence shows that plants can react to sounds, there’s no evidence today that they can actually hear them.

1. What can we know from the six-year experiment?

A．Plants of different types make the sound of the same frequeney.

B．Plants produce more regular sound in certain stressful situations.

C．Plants make sounds with a much lower frequency when stressed.

D．Plants make the sound of the same frequeney whatever the situation.

2. What is the algorithm used for in the research?

A．To record the sounds.	B．To control the sounds.
C．To produce the sounds.	D．To identify the sounds.

3. What has been proven by scientists according to the passage?

A．Plants can hear each other’s cry for help.

B．Animals can hear the sounds made by plants.

C．Plants can make sounds and respond to sound waves.

D．Animals decide what to eat based on the sounds plants make.

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

A．Sounds That We Can’t Hear

B．Beautiful Songs from Plants

C．Plants React to Different Types of Stress

D．Plants Talk, Especially When Stressed

5 . Sea ice in the Antarctic (南极) area fell to a record low this year. The drop is a result of rising temperatures worldwide. And there is no quick method to make up for the ice drop, and the recovery (恢复) has a long way to go, scientists said recently in a new study.

Antarctica’s smallest summer ice cover fell further to a new low in February. This year’s sea ice minimum (最小值) is 20 percent lower than the average (平均值) over the last 40 years. The sea ice loss equals an area nearly 10 times that of New Zealand.

The warming of Earth’s surface driven by the burning of coal, gas and oil has made Antarctica more likely to suffer from extreme (极端的) events. And the result is almost “certain” to get worse, the study said. Climate change will “lead to increases in the size and rate”of heat waves, broken ice shelves and drops in sea ice, it said.

The effects of the Earth’s warming on Antarctica and the surrounding ocean have been uncertain. Scientists have had problems measuring how much the Earth’s warming is altering the thickness of Antarctic ice.

But from events such as the fast drop in sea ice, it is “scientifically reasonable” to suppose that extreme events are going to become worse as temperatures rise worldwide, said Martin Siegert of the University of Exeter, another study co-writer.

Siegert described the temperature increase as completely surprising. Siegert added that luckily the event had happened during the Antarctic winter, instead of summer, or it would have caused melting (融化) on the surface of the East Antarctic ice cover, which has so far been saved from melting.

Siegert used the term “fragile”, meaning easily broken or damaged, to describe Antarctica. “Antarctica is fragile as an environment, but extreme events test that fragility,” he said.

1. What do the scientists think of the recovery of Antarctic sea ice?

A．It is hopeful.	B．It is difficult.
C．It is on its way.	D．It can’t be prevented.

2. Why does the author mention New Zealand?

A．To explain the size of sea ice loss.	B．To show the position of ice cover.
C．To describe how far Antarctica is.	D．To state sea ice is connected to New Zealand.

3. What does the underlined word ”altering“ in paragraph 4 mean?

A．Adding.	B．Pressing.
C．Changing.	D．Protecting.

4. What might have caused worse results according to Siegert?

A．Antarctic sea ice is recovering too slowly.

B．The Antarctic ice cover is continuously moving.

C．The environment of Antarctica is easy to break.

D．Extreme events happen in Antarctic summer.

6 . The Earth’s ozone (臭氧) layer is on its way to recovering, thanks to decades of work to get rid of ozone-damaging chemicals, a panel of international experts backed by the United Nations has found.

The ozone layer serves an important function for living things on Earth. This shield in the stratosphere (平流层) protects humans and the environment from harmful levels of the sun’s radiation.

The international community was alarmed after experts discovered a hole in the ozone layer in May 1985. Scientists had previously discovered that chemicals, used in manufacturing certain sprays and used as refrigerants (制冷剂), could destroy ozone. Two years after the discovery of the dreadful state of the ozone layer, international bodies adopted a global agreement called the Montreal Protocol. This established the phaseout (逐步淘汰) of almost 100 man-made chemicals that were tied to the destruction of the all-important ozone.

In the latest report on the progress of the Montreal Protocol, the UN-backed panel confirmed that nearly 99% of banned ozone-eating substances have been phased out. If current policies stay in place, the ozone layer is expected to recover to 1980 values by 2040, the United Nations announced. In some places, it may take longer. Experts said that 1980-level recovery over Antarctica is expected by around 2066 and by 2045 over the Arctic.

The destruction of the ozone layer is not a major cause of climate change. But research is showing that these efforts to save the ozone layer are proving beneficial in the fight against climate change. “Ozone action is a pioneer for climate action,” said World Meteorological Organization Secretary-General Petteri Taalas. “Our success in phasing out ozone-eating chemicals shows us that what can and must be done-as a matter of urgency-to shift away from fossil fuels, reduce greenhouse gases and so limit temperature increase.”

1. Why did the international community start to protect the ozone layer?

A．Because the Montreal Protocol was signed.

B．Because chemicals could destroy the ozone layer.

C．Because a hole in the ozone layer was discovered.

D．Because the stratosphere is harmful to human health.

2. Which of the following can NOT help protect the ozone layer?

A．Using less hair-setting spray.

B．Increasing refrigerant production.

C．Minimizing the use of cold air-conditioner.

D．Phasing out ozone-consuming substances.

3. What’s the main idea of Paragraph 4?

A．The Montreal Protocol is taking effect.

B．The ozone layer will fully recover by 2040.

C．The Montreal Protocol needs to be improved.

D．The ozone layer protection has a long way to go.

4. What can be inferred from Petteri Taalas’ words?

A．Climate protection has led to the ozone protection.

B．The destruction of ozone layer didn’t cause climate change.

C．It’s an urgency to reduce the use of ozone-eating chemicals.

D．Ozone protection guides our future efforts in climate action.

7 . The herd of 14 wild Asian elephants wandering around in southwestern China's Yunnan province successfully went through the last natural barrier on its way home and returned to its traditional habitat in Pu' er city on Friday.

At 1 am, the elephants, which had left their habitat in Xishuangbanna National Nature Reserve, crossed the Babian River and entered Ning'er county in Pu' er city, one of the three major habitats of Asian elephants in Yunnan. The northbound trip, lasting about 18 months, finally ended without any harm to either the elephants or local residents. The herd departed from its traditional habitat in Xishuangbanna Dai autonomous district last year and started traveling north in April. It passed through eight counties in the province during the journey. In June, it eventually reached the suburbs of Kunming, the provincial capital.

The herd started its journey with 16 members, but three of them dropped out, while two calves were born on the journey. In June, a bull elephant broke away from the group and wandered off on his own. In July, the bull elephant was lifted into a cage on the back of a truck and returned to Xishuangbanna.

The Asian elephant is listed as an endangered species by the International Union for Conservation of Nature. The animal, which can be found in the areas of Yunnan bordering Myanmar and Laos, is also under first-class State protection in China. Shen Qingzhong, a senior engineer from the Xishuangbanna National Nature Reserve, said it's inevitable（难免的）that the elephants will make another journey in the future as migration is a normal activity for elephants. “Historically, Asian elephants used to live in many parts of the country. Migration is in their nature. It helps the species expand its territory and have more chances to improve its gene pool by mating with different groups,” he said.

The forestry department and the provincial government plan to develop a national park, which aims to provide habitat protection for the elephants and a balanced relationship with residents.

1. Which of the following is True?

A．The elephants finally settled in the downtown of Kunming.

B．The journey took the elephants over two years.

C．The elephants' habitat is far away from Kunming.

D．The elephants moved towards the south of Yunnan.

2. In June, how many elephants continued their journey together?

A．13.	B．14.
C．15.	D．16.

3. What can we infer from the engineer's words?

A．Elephants can benefit from migration.

B．Migration is an abnormal activity for elephants.

C．Elephants have less chances to improve their gene.

D．Elephants used to live in its territory.

4. What does the article mainly talk about?

A．Elephants in Yunnan.	B．How to protect the elephants.
C．The activities of the elephants.	D．Elephants return from the journey.

8 . 听下面一段较长对话，回答以下小题。
1. What is the conversation mainly about?

A．Fighting fires.

B．Detecting fires.

C．Using fires.

2. How many fires did California have in 2020?

A．Around 50.

B．About 400.

C．Over 8600.

3. What size of fire can the new satellites discover?

A．Size of a car.

B．Size of a plane.

C．Size of a sports field.

4. What is more important to the woman?

A．Saving animals.

B．Saving the trees.

C．Saving humans.

9 . Popcorm Park Zoo is not like most zoos. It is a very special place.

This unusual place was not originally a zoo. At first it was called the Forked River Animal Care Center. The workers there looked after lost or unwanted cats and dogs. Today the center is part of the zoo, but now many other kinds of animals are helped there, too.

The changes to the center began in 1977 when a raccoon(浣熊)needed help. One of its front paws(爪子)had been badly hurt. The workers cared for the animal. Finally it was better, but it could not care for itself. The raccoon was allowed to live there. Then a hurt deer was brought there for help. It, too, stayed there after it got well.

Once people heard about the wonderful work being done at the center, they began taking all kinds of hurt or homeless animals there. Soon it was no longer just a home for cats and dogs. So many animals were living there that it became more like a zoo.

Popcorn Park Zoo got its funny name because many of the animals there like to eat popcorn made without oil or salt. The popcorn is sold there to help make money to care for the animals. People buy the popcorn to feed the animals as a treat.

Popcorn Park Zoo now looks after more than 200 kinds of animals. Many of them live freely there. Some of the gentler ones, such as goats, sheep, geese, and deer, walk among the visitors who come to see them. Others are kept in large closed-in areas almost like their natural homes. All the animals there get care and love.

1. Before 1977, the center was a home for          .

A．lost or unwanted cats and dogs

B．hurt or homeless raccoons and goats

C．lost or unwanted deer and sheep

D．hurt or homeless raccoons and geese

2. How did the workers in the center help the raccoon?

A．They changed its front paws.

B．They cured it and let it live there.

C．They sent it back to its home.

D．They built another home just for it.

3. The popcom is sold in Popcom Park Zoo to           .

A．treat the visitors	B．reward the workers
C．trick the animals	D．raise money

4. What can we learn about animals in the zoo from the last paragraph?

A．They all live in closed-in areas.

B．Some of them can walk out of the zoo freely.

C．All of them are taken good care of.

D．Some of them have already returned to nature.

10 . 听下面一段独白，回答以下小题。
1. When will the first storm arrive?

A．Today.

B．This weekend.

C．Next week.

2. Which city will have fog?

A．New York City.

B．Saint Paul.

C．Boston.

3. For whom will the ice cause problems according to the speaker?

A．People traveling on foot.

B．People driving on the road.

C．People celebrating by the water.

4. What will the weather be like in Chicago?

A．Sunny.

B．Snowy.

C．Windy.