1 . Vicky Barlow is a volunteer for a non-profit environmental organization. She was overturning stones in a rock pool in Falmouth, England when something “extremely bright and unusual” caught her eye. Under a large seaweed-covered rock, she made a very rare find: a rainbow sea slug (蛞蝓).

Rainbow sea slugs are very uncommon in England — they’re usually found in warmer waters, such as those along the west coasts of Spain, Portugal and France. In fact, there have only been three previously documented sightings of the species in the UK. But those were all found by divers rather than rock poolers. “It’s a warm-water species but it looks as if it has arrived here,” said the sea biologist Ben Holt. He adds that waters around the UK have seen rapid warming due to climate change. By the end of the century, water temperatures in the UK will rise by more than 3℃.

Sea slugs are particularly useful in related research. Most sea slugs only live up to about one year, which means they can make a very quick response to the changes in water temperatures caused by climate issues. In Australia, climate scientists have been collecting information on sea slugs for over 10 years to record the species and learn about changes in their distribution (分布), including their arrival in historically cooler waters.

Around 3,000 species of sea slugs exist in waters worldwide. They mainly feed on seaweed and other sea slugs. Unlike snails, adult sea slugs don’t have shells to protect them from being eaten by hungry marine animals. Instead, many of them have formed bright colors to scare off their enemies such as sea turtles, starfish and crabs. Some species may even have the unusual ability to steal stinging cells (刺细胞) from animals they feed on and shoot them out when threatened.

Before sending it back where it came from, Barlow placed the sea slug in a pot to get a better look at its colors. “It is absolutely amazing that I could find it on our rocky coasts,” Barlow writes in her blog. “It’s a perfect example of the incredible wildlife we have on our doorstep.”

1. Why are rainbow sea slugs rare in England?

A．They prefer to live in deep waters.

B．Divers are unable to recognize them.

C．Rock pools are poorly managed here.

D．The environment is normally unfavorable.

2. What can we say about sea slugs according to Paragraph 3?

A．They are important in studying climate change.

B．Their overall population continues to decrease.

C．They mostly choose to live in cooler waters.

D．Their sea habitats have been badly polluted.

3. What does Paragraph 4 mainly tell us about sea slugs?

A．Their survival abilities.	B．Risks caused by their colors.
C．Changes in their feeding habits.	D．Their common marine enemies.

4. How does Barlow probably feel about her discovery?

A．Calm and peaceful.	B．Surprised and glad.
C．Curious and doubtful.	D．Shocked and worried.

2 . A study was carried out as a cooperation program among researchers at the universities of Turku (Finland), Sydney (Australia) and Cordoba (Spain). Those researchers used artificial nests (人工鸟巢) to test two methods for reducing the nest predation (捕食) of endangered ground-nesting birds.

Predator control is a common challenge in areas where many animals, such as ground-nesting birds, cannot bear the impact of the increased number of predators. For example, in areas that have fewer top predators, the red fox population can be overly large for the areas they live in. Besides, predator control by hunting can be hard and cannot be carried out everywhere or at any time, for example, during the birds’ nesting season. In such cases, the foxes can cause a decline in the populations of some birds.

In the first experimental sites, the researchers spread waterfowl’s smell in wetland areas. With the chemical camouflage (伪装), the researchers studied whether predators might fail to find the artificial bird nests. In other areas, the researchers used eggs giving off an unpleasant smell which could cause discomfort with the goal of making predators believe that the bird eggs were not eatable. The researchers also used control sites which they visited as frequently as the experimental sites to stop predators from making the right choices.

The study showed that the chemical camouflage especially decreased the predation of the artificial bird nests by red foxes. “Unlike other predators, red foxes were more easily deceived into not eating bird eggs than some other predators. We found red foxes might rely more on their sense of smell to find bird nests. The chemical smells could make most of them think the food they found could not be eaten,” explains Senior Researcher Vesa Selonen from the University of Turku.

“Our results are interesting as they show that these approaches could reduce the nest predation of endangered birds. We’re wondering whether the results we observed with the artificial nests can also lead to the protection of real bird nests and a larger number of young birds,” says Professor Toni Laaksonen from the University of Turku.

1. What does the author want to show by mentioning predator control?

A．The number of red foxes is out of control.

B．The living areas of ground-nesting birds are limited.

C．Predator control and hunting should be applied together.

D．New solutions for fighting predation are necessary.

2. What effect did the researchers intend to produce when spreading the bird smell?

A．Driving away the smart predators.

B．Causing the bird eggs to be unsuitable for eating.

C．Making the wetland areas attractive to the predators.

D．Confusing the predators about the location of nests.

3. What does the underlined word “deceived” in Paragraph 4 mean?

A．Forced.

B．Raised.

C．Cheated.

D．Frightened.

4. What will the researchers probably do next?

A．Put their research methods into practice.

B．Search for new sites to continue the experiments.

C．Perfect their methods to study birds’ nesting behavior.

D．Develop more methods of designing artificial nests.

3 . Tropical (热带的) forests could become so hot that some kinds of leaves will no longer be able to conduct photosynthesis (光 合 作用), according to a study. The photosynthetic machinery in tropical trees begins to fail at about 46.7℃ on average. The research suggests that forests may be nearing dangerous temperature sooner than expected. Models predict that once we hit a global temperature increase of 3.9℃, these forests might experience mass leaf damage.

Chris Doughty, an associate professor at Northern Arizona University and the lead researcher of the study, said the leaf-warming experiments had revealed a nonlinear rise in temperatures. “We were really surprised that when we warmed leaves by 2, 3 or 4℃, the highest leaf temperatures actually increased by 8℃. This shows a concerning nonlinear feedback that we were not expecting.” said Doughty. “If we adopt a do-nothing response to climate change and tropical forest air temperatures increase by greater than 4℃, there could be massive leaf death.” he added.

Avoiding high emissions (排放) in the first place is key to stabilizing temperatures. “We should do all we can to avoid high-emissions. Under low-emissions, almost all tropical forest tree leaves can avoid death from overheating and the trees will survive,” said Simon Lewis, a professor of global change science at University College London. “Yet what the study doesn’t look at is heatwaves. We still might see tree deaths from overheating for limited periods during heatwaves under lower emissions.”

Researchers suggest that the damage is not yet unchanged. “Vote for people who are serious about addressing climate change and transferring to low-carbon economies, ”Disney, one researcher, advocated. More generally, we can all recognize the importance of supporting those countries and people who live in and rely on tropical forests economically, But the serious changes to tropical forests don’t just affect the local people it’s a global issue.

1. Which of the following can best replace the underlined word “nonlinear”   in Paragraph 2?

A．Global.

B．Dramatic.

C．Steady.

D．Minor.

2. What is most crucial in keeping temperatures stable?

A．Planting more trees.	B．Exploring heatwaves.
C．Conducting researches.	D．Pursuing low emissions.

3. What was Disney’s suggestion in the last paragraph?

A．Promoting global efforts.

B．Seeking economic support.

C．Helping tropical countries.

D．Boosting low-carbon education.

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

A．Global warming harms trees.

B．Tropical forests lose functions.

C．Tropical leaves struggle in heat.

D．Forests near dangerous temperature.

4 . A new study reveals that pigeons (鸽子) can tackle some problems just like artificial intelligence, enabling them to solve difficult tasks that might challenge humans. Previous research has theorized that pigeons employ a problem-solving strategy, involving a trial-and- error approach, which is similar to the approach used in AI models but differs from humans’ reliance on selective attention and rule use. To examine it, Brandon Turner, a psychology professor at the Ohio State University, and his colleagues conducted the new study.

In the study, the pigeons were presented with various visual images, including lines of different widths and angles, and different types of rings. The pigeons had to peck (啄) a button on the right or left to indicate the category to which the image belonged. If they got it correct, they received food; if they were wrong, they received nothing. Results showed that, through trial and error, the pigeons improved their accuracy in categorization tasks, increasing their correct choices from about 55% to 95%.

Researchers believed pigeons used associative learning, which is linking two phenomena with each other. For example, it is easy to understand the link. between “water” and “wet”. “Associative learning is frequently assumed to be far too primitive to. explain complex visual categorization like what we saw the pigeons do,” Turner said. But that’s exactly what the researchers found.

The researchers’ AI model tackled the same tasks using just the two simple mechanisms that pigeons were assumed to use: associative learning and error correction. And, like the pigeons, the AI model learned to make the right predictions to significantly increase the number of correct answers. For humans, the challenge when given tasks like those given to pigeons is that they would try to come up with rules that could make the task easier. But in this case, there were no rules, which upsets humans.

What’s interesting, though, is that pigeons use this method of learning that is very similar to AI designed by humans, Turner said. “We celebrate how smart we are that we designed artificial intelligence: at the same time, we regard pigeons as not clever animals,” he said.

1. What is the purpose of the new study?

A．To test a theory.	B．To evaluate a model.
C．To employ a strategy.	D．To involve an approach.

2. What were the pigeons expected to do in the experiment?

A．Draw circles.

B．Correct errors.

C．Copy gestures.

D．Identify images.

3. What do pigeons and AI have in common according to the study?

A．They are of equal intelligence.

B．They are good at making rules.

C．They respond rapidly to orders from humans.

D．They employ simple ways to get things done.

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

A．Pigeons’ trial-and-error method is revealed

B．Pigeons outperform humans in tough tasks

C．“Not smart” pigeons may be as smart as AI

D．AI models after pigeons’ learning approach

5 . In 2014, an art student from university went to Beijing Zoo. Little did he know that a chance encounter with corals (珊瑚) there would start a lifelong passion. Until today, Xu Yitang, a Beijing native, has settled in Hainan province, where he serves as a coral conservationist. For Xu, who had been studying Peking Opera since childhood, becoming a coral conservationist was an unexpected turn of events.

After he first saw corals at the zoo, he began to frequent the local market to learn about coral farming from sellers of coral products. He also learned diving and underwater photography to get a closer look at corals for research purposes. Each day, he spends several hours diving deep under the waves to observe and document the growth and development of the creatures and shares photos and videos of corals on social media platforms. His goal was to raise awareness and knowledge about corals, so that people can learn how to protect them effectively.

As he studied deeper into the creature, he learned that corals are known as “underwater gardens” of the ocean, providing a home for a quarter of all ocean life. Unfortunately, with the strengthening of the greenhouse effect, rising sea temperatures have led to coral bleaching (白化). Xu felt an increasing sense of urgency and responsibility to protect them.

While pursuing his passion to protect corals, he met his life partner, Liu Xiwen, through their shared hobby of diving in Hainan. “Unlike many young people who care about their dress and appearance, he is simply focused on protecting corals,” says Liu about Xu.“Despite his skin injury from spending long hours in the seawater, his attitude is different from what I’ve seen in most young people in Beijing, and it’s attractive to me.”

1. What can we learn about Xu Yitang from the first paragraph?

A．He majored in coral protection.

B．He was born in Hainan province.

C．He worked in Beijing as a coral expert.

D．He found his love for corals by chance.

2. Why does Xu Yitang share photos and videos of corals on social media?

A．To record his exploring process.

B．To spread knowledge about corals.

C．To introduce his diving experience.

D．To show off his photography ability.

3. What contributed to the coral bleaching?

A．The pollution of ocean environment.

B．The development of ocean farming.

C．The damage to underwater gardens.

D．The increase in ocean temperatures.

4. Which of the following best describes Xu Yitang?

A．Emotional.	B．Devoted.
C．Public-spirited.	D．Curiosity-driven.

6 . 语法填空

Sarek’s mountains used to     1     (cover) by vast sheets of ice. Around 9,000 years ago, this ice melted,     2     (leave) behind about 100 glaciers. In 1909, Sarek was made a national park to keep the land in its    3     (nature) state.

7 . 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。

    1     (save) Xizang antelopes from extinction, the Chinese government placed them under national protection.With the     2     (effect) measures, Xizang antelopes were removed from the endangered species list in 2015. People should also realize our planet needs variety to survive.     3     is important that all species—the good, the bad, and the ugly—should be treated equally.

8 . 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。

It is known to the world that one of the most deadly     1     (earthquake) of the 20th century happened in Tangshan, China in 1976. After the earthquake, the city was completely destroyed and then completely rebuilt. Today,     2     new Tangshan has been built upon the earthquake ruins,     3     has become a symbol of the Chinese spirit of never giving up.

9 . The Australian sand octopus (章鱼) was discovered in 1990 and is the only octopus species known to bury itself deep in the sand to hide from enemies. A team of researchers are studying the venom (毒液) of this kind of octopus. They have discovered that the venom may greatly slow cancer growth. And it can also help fight drug resistance in patients with a BRAF-changed skin cancer. BRAF is involved in managing cell growth. A change in it results in abnormal cell growth. These BRAF changes are seen in half of all cases of skin cancers.

“We and other groups have previously discovered that other animals-snakes, spiders, bees-have anticancer properties,” said Dr. Maria, the study’s lead author. “However, in my current knowledge, the anticancer properties of an octopus species have never been studied or confirmed before.”

Current treatments face a few challenges including low response rates, poisoning and side effects, as well as drug resistance. The octopus venom slows the growth of BRAF-changed skin cancer. More importantly, it is safe to be used in large quantities — it is not poisonous. Therefore, in combination with other drugs, the treatments could potentially achieve better and safer patient outcomes.

It is very unlikely that the octopus has specifically developed its venom to contain an anticancer substance. According to the researching team, the octopus venom contains over 1,000 unique substances with several functions such as reducing pain and anticancer.

“In this study, we have shown that the octopus venom specifically targets BRAF-changed skin cancer. The next step is to examine whether similar promising results are applicable for other BRAF-changed cancers.” said Dr. Maria. “Before it can be used on patients, the team will need to perform several rounds of lab testing and clinical trials to understand how it works and its full potential as a drug against skin cancer.”

1. What can we know about BRAF?

A．It is a change in cells.	B．It controls cell growth.
C．It can cause a deadly illness.	D．It helps to cure a skin cancer.

2. What discovery did the team make?

A．A medicine to cure cancers.	B．A substance contained in animals.
C．The medical value of octopus species.	D．The anticancer effect of an octopus venom.

3. What is an advantage of the octopus venom to treat the skin cancer?

A．It is of large quantity.	B．It has no side effects.
C．It is less expensive.	D．It has lower risks.

4. What can we infer from the last paragraph concerning the octopus venom?

A．Its application requires further work.

B．It helps treat BRAF-changed cancers.

C．Its safety needs more clinical testings.

D．It has already been put into wide use.

10 . Our dog Bree is a Staffy cross. She ________ more like a cat than a dog. Unlike other dogs, she will very happily eat up her dinner ________ what is being offered. She does not hang around us waiting for pieces to fall her way.

That is, of course, unless I am making toast (烤面包) for my breakfast. She always makes her way to the ________ and sits very straight and tall at my feet as though to say “Look at what a good girl I am!” as soon as she catches a ________ of bread toasting. I ________ her, broke off a little bit of crust (面包皮) and fed it to her before ________ some spread to my toast. This became our “thing” — if I was having toast she’d join me for breakfast. She seemed ________ and I didn’t think a little crust would ________ her. Unfortunately, the day came when I fed her a piece of toast with a generous ________ of butter and jam. Clearly, she thought it was ________ as she now turns her ________ up at dry crusts and will only eat toast topped with a tasty spread.

This incident ________ me of a smart Chinese proverb: It is ________ to pass from a poor life to a rich one, but difficult to go back in the other direction. When it comes to ________ children, we should watch out for this. ________, they might be spoiled (宠坏) easily.

1.

A．changes

B．behaves

C．works

D．looks

2.

A．regardless of

B．in case of

C．because of

D．in search of

3.

A．bedroom

B．yard

C．study

D．kitchen

4.

A．sound

B．moment

C．smell

D．word

5.

A．forgave

B．praised

C．ignored

D．trapped

6.

A．applying

B．adapting

C．sticking

D．pressing

7.

A．injured

B．annoyed

C．satisfied

D．confused

8.

A．touch

B．please

C．impress

D．ruin

9.

A．spread

B．offer

C．act

D．meal

10.

A．strong

B．delicious

C．small

D．hot

11.

A．ears

B．eyes

C．nose

D．neck

12.

A．reminds

B．frees

C．clears

D．warns

13.

A．usual

B．possible

C．great

D．easy

14.

A．training

B．raising

C．helping

D．moving

15.

A．Therefore

B．Anyway

C．Otherwise

D．Instead