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，并将答案填写在答题卡上。

Li Chunru,    1    72-year-old retired doctor in a village in East China's Jiangxi Province, has been voluntarily taking care of wild birds at Poyang Lake Nature Reserve for over 30 years, bringing over 50, 000    2    (wound) birds out of danger.

For the past 36 years, Li Chunru woke up at 5 o'clock in the morning every day and walked along Poyang Lake regularly, protecting birds from any    3    (harm)human activity. Li is among a group of volunteers    4    came forward to protect the wild birds from illegal(不合法的)activities that are endangering the existence of some species in the area. His selfless    5    (devote) to the bird protection started one day 30 years ago, when a storm destroyed the birds' nest near his house,    6    (leave) the birds scattered around. Li was    7    (deep) struck by the scene and saved 310 out of the 370.

At first, Li's work was not understood by the    8    (villager) including his family. But Li never gave up. Instead, he kept convincing them with the knowledge of the law for environmental protection. His efforts finally paid off-more and more people started to accept Li's faith and voluntarily joined the team    9    birds' protection. And the aim of stopping illegal activities around Poyang Lake    10    (achieve) in 2017.

2 . Do you still remember Jurassic Park, an amazing movie where science brings dinosaurs back from extinction? Now some very smart scientists are working on a way to revive, not dinosaurs, but other extinct species like the woolly mammoth （长毛象）using the gene editing technology known as CRISPR.

As an evolutionary biologist, obviously, it would be amazing to bring back extinct creatures. But even if we can bring them back, we are not going to be able to control how they evolve in the future. No man is an island and neither is any other creature. We need an ecosystem in order to survive. So we can think a lot about the examples of reintroducing species into the environment, like the gray wolves into Yellowstone. Ecology is very complicated and it certainly wasn't important when we first introduce rabbits into Australia, which was a total disaster eventually.

All animals like birds and mammals have to learn from their parents. If we bring them back to life, who are going to be around to teach them? We have examples where in California we've had the reproduction of the condors （秃鹰）.What scientists tried to do is to feed the babies using a mother condor puppet. When these poor creatures were released into the wild, they had an unnatural liking for humans. They didn't behave the way they should have, for condors.

According to Performing Animal Welfare Society, a healthy elephant costs about $70,000 per year to care for and an elderly elephant costs a good deal more. Of course, we are not talking about one. We're talking about many creatures. I don't think these creatures will have a future.

1. Why does the author mention the film in the first paragraph?

A．To recall an amazing movie.

B．To promote some extinct species.

C．To introduce the topic to be discussed.

D．To get to know some intelligent scientists.

2. What does the author want to tell us by the examples in paragraph 2?

A．Humans need a balanced ecosystem to survive.

B．To bring back extinct creatures was an unwise idea.

C．Helping endangered species proves to be beneficial for humans.

D．There were all sorts of positive effects about reintroducing species.

3. Which animal didn't act in its own way?

A．Condor.

B．Gray wolf.

C．Rabbit.

D．Elephant.

4. What can be a suitable title for the text?

A．Is Jurassic Park an Amazing Movie?

B．What do Creatures Need to Survive?

C．Should We Bring Extinct Animals Back to Life?

D．How does an Evolutionary Biologist Protect Animals?

3 . Many animals move from one place to another at certain times of the year. This annual movement is called migration. They migrate to find food, seek a partner, or in search of warmer weather. One of the most wonderful migrations in nature is that of the North American monarch butterfly.

Every autumn, millions of these beautiful insects with fine black and orange wings begin a long and difficult journey. Somehow they manage to travel around 4, 000 kilometers south and find their way to California or Mexico. However, until recently no one knew how they did this.

A team of scientists led by Professor Eli Shlizerman at the University of Washington has now found the answer. They have found out that the monarch is able to tell the time of day. It uses its eyes to measure the position of the sun. These two pieces of information—the time of day and the point where the sun is in the sky—allow the butterfly to determine the way to go. Eventually, it manages to reach the places where it will spend the winter.

The solution to the mystery of the monarch’s amazing ability comes at a time when it is in serious trouble. Its population has crashed by as much as 90 per cent in the last few years. Sadly, human activity is the main reason why the number of monarch butterflies is falling. In many of the places where the butterfly can be found, people are destroying the natural environment. They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.

The research on the monarch’s behavior has however led to a greater awareness of this creature. People have been working together to record its migration and make sure that there are enough plants for it to feed on. If this works, there may come a time when the number of monarch butterflies increases once again. The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come.

1. Which is not the purpose of animals’ migration according to the text?

A．To search for food.	B．To look for a partner.
C．To breed young babies.	D．To stay away from cold weather.

2. What mainly caused the decrease in the number of the monarch butterflies?

A．Weather changes.	B．Human activities.
C．Trees being cut down.	D．The long migration every year.

3. What can we know from the text?

A．All the animals migrate at fixed times of the year.

B．The monarch has the ability to identify the time of day.

C．The population of the monarch is decreasing rapidly every year.

D．No one knows how the monarch butterflies make their way to their destinations.

4. What does the last paragraph imply about the research?

A．It is quite encouraging.	B．it is fairly complex.
C．It is very unacceptable.	D．It is rather useless.

4 . A new study recently found that elephants in central African forests can encourage the growth of slow-growing trees and increase the ability of the forest to store carbon.

“As a tree, there’s a trade-off you can’t have it all,” explained Fabio Berzaghi, who led the study. “You either invest in growing fast, or in building a lot of structure with carbon to be more resistant.” Elephants prefer to eat fast-growing trees in more open spaces. As they feed and walk, they cause damage to these species, knocking over trees or breaking off branches, which results in an ecosystem that favors large, slow-growing hardwood trees. “As the elephants thin the forest, they increase the number of slow-growing trees and the forest is capable of storing more carbon, ” said Stephen Blake, one of the paper’s authors.

Scientists collected field measurements in the Congo Basin and used a computer model to predict how elephants would affect forest structure, and carbon storage potential in the long term. The data confirmed that when elephants are present, the forest contains larger trees and higher abundances of species with high wood density. Conversely (相反地)，should forest elephants go extinct, leaving those slow-growing trees struggling to compete with fast-growing species, it would result in a 7 percent loss of above-ground biomass (生物总量). As a result, central African forests could lose up to three billion tons of carbon, potentially accelerating climate change.

The sad reality is that humans are doing their best to rid the planet of elephants. “This study comes at a time when forest elephants are threatened as never before,” said Iain Douglas Hamilton, founder of Save the Elephants. “It is shocking that just as we are beginning to understand how elephants might have a key role in Africa in storing carbon, they are under real threat of extinction.” One limitation of the study, Mr. Berzaghi said, is that we do not know how much carbon has already been lost because of the elephants’ decline. But it does seem certain, he added, that putting a stop to illegal hunting and restoring forest elephant populations would bring climate benefits.

1. What can we infer about slow-growing trees in Paragraph 2?

A．They are elephants’ favorite food.	B．They are easily hurt by elephants.
C．They can help forests store carbon.	D．They may reduce elephant populations.

2. What would happen without elephants living in central African forests?

A．Climate change would possibly be sped up.

B．The forest structure would remain unchanged.

C．The forests would lose more fast-growing trees.

D．Larger trees would defeat fast-growing species.

3. What did Mr. Berzaghi suggest people do?

A．Lead a low-carbon life.	B．Evaluate the carbon loss.
C．Stop destroying forests.	D．Protect forest elephants.

4. What is the best title for the text?

A．Humans and Nature Live in Harmony

B．Elephants Disappear in Parts of Africa

C．Climate Change Affects Forest Structure

D．Elephants Defend Against Climate Change

5 . 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。

Workers in India are moving over 300 crocodiles from their home because they are too near a new tourist sight. They could be a danger to tourists     1     (visit) the new Statue of Unity which was opened to the public recently. It is 182 meters high and is the     2     (tall) statue in the world. It is next to a reservoir, which is also home to many crocodiles. Tourism officials want to have the crocodiles     3     (move) so seaplanes for tourists can land on    4    reservoir. If the crocodiles stayed, they could be dangerous and attack tourists. Officials are using     5     (cage)to catch the animals. They are going to a new home in another part of Gujarat.

Animal lovers are angry about the moving. One said, “The government is disturbing their home and putting their lives     6    risk. The government hasn't thought out where it will set free the seized crocodiles safely.” So far, only 17 of the animals     7     (catch)and moved. Another said, “Have we collectively lost our minds?     8     any environmentalist will tell you, this is     9    (complete) crazy.” Moving the crocodiles could break India's wildlife protection laws. An official said the crocodiles had to go for “    10     (secure) reasons”.

6 . 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。

A population of the world's most invasive mosquito species was almost completely wiped out by    1    experiment on two islands in the southem Chinese province of Guangdong, according to a study , which     2    (publish) Wednesday

The experiment successfully reduced the female Asian Tiger Mosquito population-the main source of bites and disease transmission-by up to 94%,    3     (reduce) the number of reported human bites by 97%.

One of the Chinese study's    4    (researcher), Xi Zhiyong, a professor at Michigan State University, has been a longtime pioneer in this field of study,    5    is running a mosquito factory in southern China. He    6    (previous) attempted to use sterilized(绝育的) male mosquitoes to mate with unaltered females In the new study,    7     (publish) by the International Journal of Science, Xi and his colleagues attempted to cut mosquito numbers even    8    (far) by limiting both males and females' ability to reproduce.

The results were so successful that they nearly    9     (wipe) out the entire female mosquito population on the two islands.

Mosquitoes pose grave threats to human health beyond just irritating bites. However, there is currently no effective vaccine or treatment     10    most mosquito-transmitted diseases, leaving controlling the insects' populations one of the most effective control methods, according to the International Journal of Science.

7 . How to Grow Organic Tomatoes in a Container

Anyone who has seen tomatoes growing in a garden knows that they tend to be huge plants.     1     So the first thing to do when considering growing tomatoes in a pot is to find a suitable variety.

After you find the perfect plant, it is time to plant it. In general, plastic or fiberglass pots are best for growing tomatoes. They don’t dry out quickly. While tomatoes love heat, they don’t like being dry.     2     Besides, tomatoes need to grow in a reasonably large pot. A pot must be 8 inches deep. That’ s the absolute minimum. A 12- or 16-inch pot is even better.

Any good quality organic potting soil works for tomatoes. Don’t use soil dug directly from the garden.     3     Compost-based soil, whether purchased or mixed from your special recipe, is nice. When planting the tomato, put some soil in the bottom of the pot and set the plant in. After you have the plant set at the proper level, fill in around it with soil. The soil should go up to about an inch below the rim of the pot to allow room for watering.

    4     The best way to tell when to water is to stick your finger into the soil—if the first two inches are dry, it’s time to water.

The trickiest thing about growing tomatoes in a pot is that they are heavy feeders. Every time you water, you wash nutrients out of the soil. So fertilize （施肥） regularly. Once a month is good. But every other week, applying the fertilizer at half-strength is better.     5    

A．It is too heavy for container gardens.

B．That’s why clay pots are popular.

C．Instead, use whatever soil you can get.

D．And dry soil can reduce fruit production.

E．This provides constant nutrients for the tomato plants.

F．They require people’s much work to stay manageable.

G．Tomatoes don’t like being dry, so water them regularly.

8 . A study has found that warmer waters off North America's West Coast caused many kinds of sea life to move farther north than ever before.

The study was a project of scientists from the University of California, Davis. The scientists examined waters off the coast of Northern California in the eastern Pacific Ocean. The researchers say they recognized a local of 67 species（ 物种）between 2014 and 2016, during what was described as a "marine heat wave". Marine heatwaves were explained in the study as "period of extreme sea surface temperatures lasting for days to months". The 2014-2016 heatwave is thought to be the largest ever recorded. The warn water later moved south toward California.

The warmer water were partly a product of El Niño conditions during the same period, researcher noted. El Niño develops when winds off the coast of South America weaken. This enabled warm water in the western Pacific to move eastward. El Niño often causes ocean temperatures in the area to rise between 2 to 4 degrees Celsius, the study found.

The researchers reported that 37 of the 67 species they studied had never before been observed so far north as California. These creatures are native to an area hundreds of kilometers to the south, mainly around Baja California in Mexico. A few were even found north of California, off the state of Oregon. The northward travel of so many different sea creatures was considered "unprecedented"（史无前例的）by the researchers. Among the species found in the study were a meat-eating sea slug that hunts other sea slugs, a sea snail "butterfly" and purple-lined jellyfish. Another unexpected visitor was the pelagic red crab, which researchers said had only been found in areas off the coast of Mexico.

Scientists involved in the study believe the findings can provide valuable information for knowing future sea life reactions to warming oceans.

1. What is a marine heat wave according to the passage?

A．An ocean with rough surface.

B．A wave with low temperatures.

C．A period of warmer ocean surface water.

D．A species living in extreme weather.

2. What contributes to El Niño conditions?

A．Warmer waters.	B．Weakened winds off South America.
C．Colder sea surface.	D．Species moving northward.

3. Why does the author mention the men-eat in sea lug in paragraph 4?

A．To point out that ocean environment becomes worse.

B．To suggest that sea creatures need separate living space.

C．To prove that many kinds of sea life can adapt to warmer waters.

D．To evidence that ocean temperature along California are higher than before.

4. What can be inferred from the passage?

A．The heatwaves disturb the life of many sea creatures.

B．The increased temperature benefits many sea creatures.

C．Sea life reactions can be valuable to predict future heatwaves.

D．The heatwaves cause many unexpected visitors to move southward.

9 . We human beings haven’t been good friends to animals. For thousands of years, we have been polluting the environment ,making it hard for animals to live on the planet. We have been killing animals for their fur, feathers or meat, or simply because they are dangerous. As a result, many kinds of animals have disappeared forever. Hundreds more are on the endangered list today.

Should we care about animals? Of course we should. If animals of a certain kind all disappear, they will never come back again. Animals are more than just resources of things we need. Every kind of animal has its place in the balance of nature. Destroying any kind of animal can lead to many problems. For example, when farmers killed large numbers of hawks(鹰)，the corn and grain that the farmers stored were destroyed by rats and mice. Why？Because hawks eat rats and mice. With less and less hawks to keep down their numbers, rats and mice multiplied quickly. And if people kill too many birds, the fields will be bothered with insects. It is because birds eat insects. When there are less and less birds, more and more insects will eat the crops.

Luckily, we’ve realized that we shouldn’t kill animals any more. And people are working hard to save those animals that would disappear soon. The government also passed laws to protect the endangered animals. In fact, quite a few countries have passed such laws. These laws forbid the killing of any kind of animal on the endangered list. We should try our best to protect and save the endangered animals.

1. Why do people kill animals?

A．Animals cause endless trouble.

B．They kill animals for something they need.

C．Animals destroy their natural balance.

D．They kill animals to control their number.

2. The example that farmers killed hawks shows that .

A．there are too many rats and mice

B．animals are very beautiful and interesting

C．animals are good food resources

D．every kind of animal is very important in nature

3. What can be learned from this text?

A．Killing off one kind of animals would cause some new problems.	B．The endangered animals should be kept away from people.
C．People cared much about animals because they relied on them.	D．The number of dangerous animals increased too fast in the past.

4. What is the author’s attitude towards the future of endangered animals?

A．Doubtful

B．Uncaring

C．Optimistic

D．Negative

10 . Joanne was stuck in a traffic jam in central Birmingham at 5:30, and at 6:30 she was expected to be chairing a meeting of the tennis club. At last, the traffic was moving. She swung quickly racing to her house. As she opened the door, she nearly tripped over Sheba.

“Hey, Sheba,” she said, “I’ve got no time for you now, but I’ll take you out as soon as I get back from tennis club.” Then she noticed Sheba seemed to be coughing or choking. Obviously, she could hardly breathe. Immediately, Joanne realized she would have to take her to the vet (兽医). When she got there, the vet was just about to close for the day. Seeing the state of Sheba, Dr. Sterne brought her quickly into his office.

“Listen, doctor, I’m really in a rush to get to a meeting-can I leave her with you, and go and get changed? I’ll be back in ten minutes to pick her up, and then I’ll take her on to the meeting with me. Is that OK?”

“Sure,” said the doctor.

Joanne made the quick trip back to her house in a couple of minutes. As she was once more entering the hallway, the phone by the door began to ring.

“This is Dr. Sterne,” said an anxious voice. “I want you to get out of that house immediately,” said the doctor’s voice. “I’m coming round fight away, and the police will be there any time now. Wait outside!”

At that moment, a police car screeched to a stop outside the house. Two policemen got out and ran into the house. Joanne was by now completely confused and very frightened. Then the doctor arrived.

“Where’s Sheba? Is she OK?” shouted Joanne.

“She’s free, Joanne. I took out the thing which was choking her, and she’s OK now.”

Just then, the two policemen reappeared from the house, half-carrying a white-faced man, who could hardly walk. There was blood all over him.

“My God,” said Joanne, “how did he get in there? And how did you know he was there?”

“I think he must be a burglar,” said the doctor. “I knew he was there because when I finally removed what was stuck in Sheba’s throat; it turned out to be three human fingers.”

1. What was Joanne supposed to do at 6: 30?

A．To walk her dog.	B．To see her doctor.
C．To attend a club meeting.	D．To play tennis with her friends.

2. Joanne wanted to get back to her home again ____________.

A．to dress up for the meeting

B．to phone the police station

C．to catch the badly hurt burglar

D．to wait for her dog to be cured

3. From the passage, we can infer that ____________.

A．Sheba fought against the burglar

B．the police found the burglar had broken in

C．Joanne had planned to take her dog to the meeting

D．the doctor performed a difficult operation on the dog

4. In this passage, the writer intends to tell us that the dog is ____________.

A．clever	B．friendly
C．frightening	D．devoted