1 . Directions: After reading the passage below, fill in each blank with a proper word given in the box. Each word can be used only once. Note that there is one more word than you need.

A. conserve             B. wrinkly             C. stationary             D. exceptional             E. oddities             F. nursing       G. timely             H. sounding             I. generalize             J. comprise             K. rules

The Curious World of Bats

Not all bats are unbelievably adorable, like the one below. Many of them have     1     faces and large ears that help them “see” in the dark, using echo location (回声定位). But all bats are, without a doubt,     2     creatures.

Scientists are typically reluctant to     3     about bats because they make up such a large and diverse group of winged animals. With nearly 1, 500 species, bats     4     about one-fifth of all mammal (哺乳动物) species on Earth. But one thing that can be said about them as a group is that they are, in not- so-scientific terms, very odd. “They break all the     5    ,” said Cori Lausen, a bat expert at the environmental group Wildlife Conservation Society Canada.

Being able to fly is just one of their     6    , since mammals rarely fly. Apart from that, bats can also push their heart rate to extreme highs and lows-as slow as one beat per minute. Many bat species can go into a period of deep sleep, known as “torpor”, for a few hours a day or even for weeks to     7     energy when it’s cold or food is unavailable. And while most small mammals have short lives and lots of babies, some bats can live for two decades or more and typically have just one baby per year.

For how much energy they need, it’s also surprising that many bat species, including most of those in the US, rely on insects alone for food. They have to eat ridiculous quantities of them. A mom that is     8     a baby can catch more than 4,000 insects in one night.

Oddly, although bats can fly, they can’t easily take off from a(n)     9     position, like most birds and insects do. That’s one reason why they hang upside down-bats have to gain the momentum they need by falling. “For them, it’s not upside down,” Frick said. “It’s flight-side ready!”

While bats remain highly understudied relative to birds and other mammals, scientists are     10     the alarm. In North America, more than half of all bat species are at risk of severe population decline. Climate change, they say, threatens to only speed up their extinction.

2 . Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible. 

Microplastics: Out of Sight, Out of Mind?

People joke that someone suffering from paranoia (妄想症) sees danger everywhere, thinking someone is out to get him. In the case of microplastics, you don’t need to have paranoia to be worried about them being everywhere, because they basically are!

What exactly are microplastics? They are particles (颗粒) of any type of plastic that are less than 5 millimeters in diameter (直径). They have resulted from the plastic pollution widespread in the world today.

When plastic is exposed to environmental forces, it breaks down into these tiny particles, which, in turn, do not disappear but continue to exist for hundreds or even thousands of years. Every piece of plastic that has ever been made is still on Earth today, except for what has been burned. Often mistaken for food, plastics and microplastics in oceans and on beaches are often consumed by marine animals, which is harmful. Research has linked microplastics to cancer and other problems in animals.

Whatever you think about these particles, taking them in is easier than you think. When you heat food in a plastic dish in the microwave, microplastics get into your food. The water from a plastic water bottle contains the particles as well. After taking surveys of microplastics in air, water and seafood, scientists estimate that people may easily be eating 5 grams of plastic a week. Researchers don’t know yet if or how this will affect humans. Microplastics have been found in human tissue samples, and no one yet knows how long they stay in the human body or what problems may arise.

Not until the amount of plastic waste in the world is reduced will microplastics decrease. So, while the evidence is still missing of the effect microplastics have on people’s health, reusing and recycling plastic is a no-brainer.

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3 . Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once.   Note that there is one word more than you need.

A. chaos        B. consume        C. plentiful       D. discharge        E. evolutionarily     F. extent G. freeze   H. mechanism       I. novel          J. subsequently     K. unstable

Science in Images

Oyster mushrooms feature in cuisines around the world, but they should be off the menu for hungry worms -- which these delicious mushrooms will kill and eat. Now researchers finally know how they do it.

A study published in Science Advances details how oyster mushrooms use a particular poisonous substance to freeze and get rid of mushroom-eating roundworms called nematodes (线虫). The mushrooms, which grow on nutrient-poor dead wood, then     1     the worms for nutrition.

“Nematodes happen to be the most     2     animals these mushrooms encounter. So I think,     3    , this cross-kingdom interaction is very interesting,” says study senior author.

The study team of geneticists, biochemists and biologists had previously found that oyster mushrooms release an unidentified poisonous substance that will somehow     4     the worms within minutes and cause a chemical element to flow into their cells, killing them. This     5     differs from those used by other meat-eating mushrooms and could be unique to oyster mushrooms.

For their new work, the researchers grew and analyzed samples of the mushroom’s tissue, finding no noticeable poison even when they broke it up. They reasoned that whatever was killing the worms must be a kind of     6     compound that disappears into air when disturbed. When they damaged the oyster mushroom tissue again and     7     analyzed the nearby air, they finally found a nerve gas that turned out to be contained with tiny, special-shaped structures on the mushroom surface. When nematodes touch the mushrooms, these structures     8     their gas, disturbing the worms’ cell walls to cause immobility and death. The worm is then digested by the mushrooms.

Before this study, “we underestimated the     9     to which wild mushrooms defend against or consume nematodes,” notes Nick Talbot, a geneticist at Sainsbury Laboratory in Norwich, England. The study demonstrates “a very     10     approach,” he adds. “These organisms are really difficult to work on, and Dr. Hsueh is showing that you can do some really amazing work with them.”

4 . 听下面一段独白，回答以下小题。1.

A．They have been sent to wildlife parks for protection.

B．Their habitats have been well-protected.

C．They have been taken care of by locals.

D．Their population has almost doubled.

2.

A．She fought against illegal hunting.	B．She helped to cure their disease.
C．She improved their living conditions.	D．She was engaged in preserving forests.

3.

A．To teach people how to treat gorillas.	B．To boost the economy of Uganda.
C．To better the Batwa people’s lives.	D．To raise funds for wildlife protection.

5 . 听下面一段独白，回答以下小题。1.

A．5%.

B．80%.

C．40%.

D．10%.

2.

A．Polluting the environment.

B．Destroying wildlife habitats.

C．Endangering new species.

D．Hunting to a great extent.

3.

A．To appeal to people to protect wildlife.

B．To emphasize the importance of the Earth.

C．To describe different ways to stop pollution.

D．To analyze the reasons for wildlife’s disappearing.

6 . Antarctic Tourism: Should We Just Say No?

More people are visiting Antarctic, the frozen continent than ever before.     1     This has brought a new urgency to the question of how much, if any, tourism should be allowed on the icy continent.

The distance most visitors travel to reach Antarctica makes carbon emissions a serious problem.     2     One study calculated that each tourist between 2016 and 2020 was effectively melting around 83 tonnes of snow, due largely to emissions from vacation ships.

    3     The Antarctic Treaty, established in 1961 to provide governance for the continent, operates on a consultative basis, which means all 56 parties have to agree before a change can be put into action. The last major decision on tourism was a measure passed in 2009 that prohibits vacation ships carrying more than 500 passengers from making landings. That regulation has still not officially been carried out as not every signatory country has accepted it domestically.

There is clear agreement that something needs to change, but no agreement on what those changes should be.     4    

A．The number of visitors hit 100,000 for the first time this tourist season, a 40% jump over the previous record.

B．The Antarctic is at risk not just because of the breakability of its environment, but due to the lack of a single governing body.

C．Should landings be made at a larger number of sites for instance, or should we aim to keep the human footprint as small as possible?

D．If what you really want is to connect with snow and ice and you’re in the northern half, can you catch a train to the nearest snow region instead?

E．The average per-person carbon emissions for an Antarctic tourist are 3.76 tonnes – about the total sum that an individual typically generates in an entire year.

F．There is so little regulation now that almost anything that will protect the areas by an official legal source rather than self-regulated would be really positive.

7 . My son, Ben, died when he was 23. The year after his death, I hiked 48 of the state’s tallest mountains in his memory. Every step, path and peak has been a way to restore.

About a month after his death, my husband and I hiked Carter Dome and Mount Hight, sorrow weighing heavy in our hearts and legs. Standing on the peak, I looked out across the mountains my son loved. For a moment, the heavy blow brought about by Ben’s death faded into the timeless expanse, and I could breathe.

The next weekend found us on Mount Moosilauke. Then Mount Cannon, Mount Flume, Mount Liberty and so on. It was a series of firsts, of struggles and overcoming them — climbing at night, climbing slides and rocks, camping alone, finding paths and planning routes.

Six days before the anniversary of Ben’s death, I hiked my 48^th and final peak: Mount Carrigain. As I stood on the observation platform at the peak, I found the essential truth I had been grasping to express for months: The only place that feels vast enough to hold sorrow this deep and wide is the top of a mountain, looking out into forever.

These days, I hike not to hide, but to seek. I find Ben, but I also find myself: someone broken, now braver and more capable. The forced isolation of sorrow becomes the welcome loneliness of the path; the peace of nature replaces the pain of loss. Hiking is both exhausting and exciting, and it teaches us that sorrow and joy can coexist.

But there’s another, possibly more important truth: A hike is not the only way to find the peace of the natural world; a simple walk along a park path can have a similar effect. The internal journey of sorrow mixes with our steps, and we find comfort along the way.

1. How did the writer feel after climbing Carter Dome and Mount Hight?

A．Doubtful.

B．Relieved.

C．Sad.

D．Terrified.

2. After hiking the 48 peaks, the writer learned that __________.

A．it was possible to live with both sorrow and joy

B．it was the isolation of sorrow that exhausted her

C．only by overcoming struggles could one survive

D．the peaks were proper places to remember someone

3. What does the writer imply in the last paragraph?

A．Walking works best for those in sorrow.	B．We can plan our internal journey as intended.
C．What counts is to make peace with ourselves.	D．People tend to hike in parks to seek comfort.

4. Which of the following is the best title for the passage?

A．The Heavy Steps That Led Me To Peaks	B．The Mountains That Held My Sorrow
C．The Journeys That Frustrated Me	D．The First Struggles That Empowered Me

8 . The emergence of black holes undoubtedly marks the beginning of a revolution. Black holes have many peculiar properties, such as the alteration of space and time, the radiation of gravitational waves and so on. Scientists are still trying to study the properties and evolution of black holes in order to better understand the origin and evolution of the universe.

Recently, a team of astronomers may have found a solo-wandering black hole using a strange trick of gravity called microlensing (微透镜效应), but the results still have to be confirmed.

Sometimes it’s tough being an astronomer. Nature likes to hide the most interesting things from easy observation. Take, for example, black holes. Except for the strange quantum (量子) phenomenon of Hawking radiation, black holes are completely black. They don’t emit a single bit of radiation – they only absorb, hence their name.

To date, the only way astronomers have been able to spot black holes is through their influence on their environments. For example, if an orbiting star gets a little too close, the black hole can absorb the gas from that star, causing it to heat up as it falls. We can watch as stars dance around the giant black hole at the center of the Milky Way.

Even the famed pictures of the black holes in the center of the Milky Way and the M87 galaxy(星系) aren’t photographs of the black holes themselves. Instead, they are radio images of everything around them.

But surely not all black holes have other light-emitting objects around them to help us find them. To find these wanderers, astronomers have tried their luck with microlensing. We know that heavy objects can bend the path of light around them. This is a prediction of Einstein’s general theory of relativity, and the slight bending of starlight around our own sun was one of the first successful tests of the theory.

Microlensing is pretty much what the name suggests. When astronomers get extremely lucky, a wandering black hole and pass between us and a random distant star. The light from that star bends around the black hole because of its gravity, and from our point of view, the star will appear to temporarily flare in brightness.

And when I say “extremely lucky” I mean it. Despite trying this technique for over a decade, it is only now that astronomers have found a candidate black hole through microlensing. Two teams used the same data, a microlensing event recorded from both the OGLE (Optical Gravitational Lensing Experiment) telescope in Chile and the MOA (Microlensing Observations in Astrophysics) telescope in New Zealand. One team found that the mass was somewhere around seven times the mass of the sun – definitely black hole territory. But the other team estimated a much smaller mass, around 2-4 times the mass of the Sun. If the true mass of the object is at the lower end of that spectrum (光谱), then the wanderer is probably not a black hole.

1. Why does the author say it is hard to be an astronomer?

A．Einstein’s theory is hard to understand.

B．Many things in nature are not easy to observe.

C．Understanding the evolution of the universe is not easy.

D．Whether the black hole has been found remains to be seen.

2. What is the example in Para. 4 trying to prove?

A．Stars’ wandering in black holes.

B．Black holes’ absorbing the star’s gas.

C．The relationship between stars’ heating and black holes.

D．Finding black holes by observing environmental changes.

3. What does the author tell us about the discovery of black holes?

A．People can often find black holes with glowing objects.

B．Research groups can work together to find black holes.

C．Glowing objects around black holes help us find them sometimes.

D．Understanding the properties of black holes helps find them.

4. What conclusion can we draw from the last paragraph?

A．To persevere in the end is to win.

B．Facts speak louder than words.

C．Failure is the mother of success.

D．Things are not always what they seem.

9 . Many of the world’s islands were previously unexplored places, but over time, people have come to these places with far-reaching effects, including deforestation, over-hunting and the introduction of invasive species. _______, most of the bird species disappeared.

While the death of many birds since the 1500s has been _______, our knowledge of the fate of species before this relies on fossils (化石), and these records are limited because birds’ lightweight bones are _______ over time. This conceals the true _______ of global extinctions.

Researchers now believe 1,430 bird species — almost 12 per cent — have died out over modern human history since around 130,000 years ago, with the vast majority of them becoming extinct directly or indirectly _______ human activity.

The study, led by the UK Centre for Ecology & Hydrology (UKCEH) and published in Nature Communications, used statistical modelling to _______ the undiscovered bird extinctions.

Lead author Dr Rob Cooke, an ecological modeler at UKCEH, says:“Our study demonstrates there has been a far higher _______ impact on diversity than previously recognized. Humans quickly destroyed bird populations through habitat loss, over-exploitation, and the introduction of rats, pigs, and dogs, which attacked the birds’ nests, and _______ with birds for food. We show that many species became extinct before written records and left no _______, lost from history.”

Dr Søren Faurby of the University of Gothenburg, a co-author of the study, adds: “These historic extinctions have had a major impact on the current biodiversity crisis. The world may not only have lost many fascinating birds but also their varied ________ roles, which are likely to have included key functions such as pollination (授粉). This will have had knock-on effects on ecosystems, so, ________ bird extinctions, we will have lost a lot of plants and animals that ________ these species for survival.”

Observations and fossils show 640 bird species have been driven extinct — 90 per cent of these on islands ________ by people. These ________ from the iconic (标志性的) Dodo of Mauritius to the Great Auk of the North Atlantic to the lesser-known Saint Helena Giant Hoopoe. But the researchers estimate there have been further 790 unknown extinctions, meaning a total of 1,430 lost species — leaving just under 11,000 today. Therefore, from the perspective of protecting species ________, the protection of birds is an urgent issue for mankind.

1.

A．To some extent

B．On average

C．As a result

D．In short

2.

A．confirmed

B．recorded

C．concealed

D．discussed

3.

A．distracted

B．disposed

C．dismissed

D．disintegrated

4.

A．extent

B．context

C．outcome

D．influence

5.

A．due to

B．other than

C．instead of

D．in spite of

6.

A．declare

B．illustrate

C．estimate

D．emphasize

7.

A．climate

B．human

C．environmental

D．natural

8.

A．connected

B．coped

C．lived

D．competed

9.

A．trace

B．route

C．change

D．proposal

10.

A．interactive

B．ecological

C．productive

D．social

11.

A．in terms of

B．because of

C．except for

D．in addition to

12.

A．depend on

B．interact with

C．fight against

D．stay away

13.

A．inhabited

B．removed

C．developed

D．killed

14.

A．result

B．range

C．suffer

D．date

15.

A．origin

B．project

C．growth

D．diversity

10 .

A．The effects of the flood.	B．The fight against the flood.
C．The cause of the flood.	D．The ten floods of the year.