1 . In a study, published in the journal Proceedings of the Royal Society B: Biological Sciences, a team of French researchers at the University of Sorbonne Paris North demonstrated that ants have the potential to act as early stage cancer detectors.
“We knew that ants can be easily trained,” Baptiste Piqueret, who led the study, said. “Furthermore, they have an efficient sense of smell. We then combined these two abilities and tested whether ants were able to detect the smell of cancer or not.”
Tumor (肿瘤) cells produce specific chemical compounds that allow them to be distinguished from healthy tissues. These are known as cancer biomarkers. Animals can be trained to sniff out (嗅出) these chemicals and thus identify when a patient has cancer.
In the present study, worker ants of the species Formica fusca — commonly known as the silky ant —were trained to recognize cancer biomarkers of an extremely aggressive human breast cancer. The urine (尿液）of mice carrying these tumors was collected and presented to the trained ants, alongside urine from tumor — free mice.
After just three rounds of training, where the ants learned to associate the smell of cancer biomarkers with a sugary treat, they spent approximately 20 percent more time near the urine from the tumor - bearing mice than the urine from those who were tumor-free.
In the past, dogs and mice have also been shown to sniff out cancers. But ants would provide a particularly attractive alternative as they are relatively easy to keep, they don't require expensive rearing (饲养) facilities, and it appears that they can be trained to recognize specific odors in relatively few trials.
1. What does the underlined phrase “two abilities” in paragraph 2 refer to?① Ants are cheap to buy. ② Ants can be easily trained.
③ Ants have a good sense of smell. ④ Ants are available all over the world.
| A．①② | B．②③ | C．③④ | D．①④ |
| A．They are different in size. | B．They are different in color. |
| C．They are different in smell. | D．They are different in quantity. |
| A．By doing experiments. | B．By quoting others’ research. |
| C．By collecting published data. | D．By doing online questionnaires. |
| A．To indicate the new trend of medical research. |
| B．To list the achievements made by the researchers. |
| C．To show the advantages of ants as cancer detectors. |
| D．To explain how to train other animals to serve people. |
2 . A new study has found that all dogs have different personalities—even dogs of the same breed(品种).
Elinor Karlsson studies genetics at the University of Massachusetts. She co-wrote a report about the study, which appeared recently in the publication Science.
Karlsson said, “Every dog really is an individual,” noting that there is “a huge amount of difference” even between dogs that look the same.
At a New York dog park, dog owners talked about the different characteristics of their pets. Elizabeth Kelly owns an English springer spaniel. She called her dog friendly, but also “kind of the queen bee.” In other words, her dog likes to act like it is in charge of other dogs. Suly described her yellow Labrador as “calm, lazy and shy.”
The idea of dog breeds is quite recent. Around 160 years ago, humans began to breed dogs to have certain physical qualities, such as fur, color and ear shape.
Karlsson said her aim was to learn how much a dog’s breed affects their behavior. The answer? Breed does not decide an individual dog’s personality.
Karlsson’s team gathered information from 18,000 dog owners and studied the genetic code of over 2,000 dogs. The researchers found that some qualities are based on genetics. However, it is not sure that two dogs of the same breed will behave in the same way.
For example, huskies and beagles, may be more likely to howl—or make a long, loud barking sound. But many of these dogs do not howl, as owner observations showed.
1. What do we know about Karlsson’s report?| A．She wrote it by herself. |
| B．It was published in Science. |
| C．She finished it after graduation. |
| D．It is of little value to her study. |
| A．A bee that behaves busily. |
| B．A dog whose name is Queen. |
| C．A bee that serves the whole group. |
| D．A dog acting as if it is the most important. |
| A．To help dog owners learn about their dogs better. |
| B．To prove dog breeds determine their personalities. |
| C．To study the relationship between dog breeds and behaviors. |
| D．To show different dogs have different personalities. |
| A．All the dogs can make a long, loud barking. |
| B．Dogs of the same breed can behave differently. |
| C．Dogs’ owners may observe their pets carelessly. |
| D．Huskies and beagles are not the same dog breed. |
Usually,we are encouraged to be nice to our people. However, we always forget to be nice to
Global warming is quite
Simple things that can be done every day can help slow down global warming and make the Earth better place for us,our
There
4 . Rubbish of all kinds is piling up in landfill and polluting our rivers and oceans. A more recent addition to the list of things we discard is e-waste — electronic items that are broken and not recycled. A UN report claims the 50 million tonnes of e-waste produced every year will more than double to 110 million tonnes by 2050, making it the fastest growing waste stream in the world. Now ways are being found to give it a new life.
There’s a growing trend for repair events and clubs which could be part of a solution to the growing amount of electrical and electronic garbage. The BBC visited a Restart Project in London, which is one of the many found around the world. One of its volunteers, Francesco Calo said, “This project allows you to reduce waste, lengthen the life of objects, and it helps people who cannot afford to get rid of items that have developed a fault. ”
Electronics consist of materials like plastic, metals, chemicals and glass. As many electrical items contain valuable metals, another idea is e-waste mining. An experiment at the University of New South Wales includes extracting (提取) these materials from electronic items. It’s thought that doing this could be more profitable than traditional mining. With phones typically containing as many as 60 components, this could be part of the solution to our appetite for new technology.
These projects make total sense — collections of e-waste for recycling are not progressing or even decreasing according to Ruediger Kuehr of the United Nations University. And in countries where there are no recycling laws, much of it is got rid of. However, the European Union, for example, is trying to settle the problem by insisting business firms have to make appliances longer-lasting and have to supply spare parts for machines for up to 10 years.
1. What does the underlined word “discard” in Paragraph 1 mean?| A．throw away | B．take apart |
| C．make the best of | D．put together |
| A．Collect electronic garbage. | B．Use their electronics longer. |
| C．Buy good-quality electronics. | D．Get jobs in recycling companies. |
| A．Hard plastic. | B．Precious metals. |
| C．Toughened glass. | D．Various chemicals. |
| A．Improving recycling process. | B．Replacing spare parts timely. |
| C．Using electronics permanently. | D．Making e-waste recycling laws. |
5 . 72 hours in Beijing
Traveling to China is no longer a luxury for many foreign passport holders. The Chinese government has permitted a 72-hour visa free policy that offers access to visitors from 53 countries including the US, France and Austria. Let’s start with the capital of China, Beijing. Here’s a pick of the best in Beijing.
Mutianyu Great Wall
Your trip to Beijing isn’t really complete without seeing one of the “New Seven Wonders of the World” — the Great Wall of China. The Mutianyu section of the Great Wall is by far the most well-preserved of all. Taking a one-hour bus ride, Mutianyu would be your ideal location for a half-day of hiking away from the large crowds in the city. Also, the authorities have allowed tourists to paint graffiti on a specific section of the Great Wall since 2014. The Great Wall was designated (把……定名为) a UNESCO World Heritage site in 1987.
Summer Palace
Located in northwestern Beijing, the Summer Palace is by far the city’s most well-preserved royal park. With its huge lake and hilltop views, the palace offers you a pastoral escape into the landscape of traditional Chinese paintings. The Summer Palace was added to the UNESCO World Heritage List in 1998.
798 Art Zone
This would be on the top of my list! Named after the 798 factory that was built in the 1950s, the art zone is home to various galleries, design studios, art exhibition spaces, fashionable shops and bars. You could easily spend half your day wandering around the complex, feeling the contrast of the present and the past.
Sichuan Provincial Restaurant
While in Beijing, apart from trying the city’s best-known Peking duck, the Sichuan provincial restaurant is one of places where you can enjoy regional delicious food. It offers one of China’s eight great cuisines, Sichuan Cuisine, which ranges from Mapo tofu to spicy chicken.
1. When was the Summer Palace added to the UNESCO World Heritage List?| A．In 1950. | B．In 1987. |
| C．In 1998. | D．In 2014. |
| A．Mutianyu Great Wall. | B．798 Art Zone. |
| C．Summer Palace. | D．Sichuan Provincial Restaurant. |
| A．The tourists who prefer to travel for free. |
| B．The foreigners to stay in Beijing for 4 days. |
| C．The visitors coming from every corner of China. |
| D．The foreigners coming to Beijing for the first time. |
Dogs are often called “man’s best friend” and make ideal pets.
The most attractive quality of
Furthermore, dogs are strong
And finally, dogs can be
To sum up, dogs are
I sat at the breakfast table with my four-year-old son, Andy, trying to ignore the ache in my stomach. “Mama, want to play?” “Not today, baby.” I shook my head. These days I could barely get out of bed. I was still recovering from an operation. I hoped for strength and happiness. But the future seemed so hopeless.
Suddenly Andy jumped up from his spot on the kitchen floor. “Bird!” he shouted, rushing to our courtyard. Sure enough, there was a white dove seated in a tree. It sat there for a few moments, and then flew away. Strange, I’d never seen one in our neighborhood before.
When I dragged myself to the kitchen the next morning, the dove was back. This time it was with a mate carrying sticks, “Look, Andy,” I said, pointing to the tree. “They are going to make a nest.” The doves flew in and out of the courtyard all week, building on top of the tree.
Andy could hardly contain his excitement. Every morning, he’d run into the kitchen and take his spot by the door, talking to the birds while they worked. His happiness was influential. Much as I was sad, I couldn’t help but look forward to the doves’ visit too.
Then it all went wrong. The courtyard was a safe enough spot for a nest, but the tree is broad, thin leaves were far from stable. One night, a strong wind blew, throwing the doves’ nest to the ground. I heard the twigs(细枝) break apart.
I examined the damage. Nothing good ever lasted. I wouldn’t blame the doves if it never came back. But they returned. They started again from the beginning. Again, though, the wind destroyed all their hard work. The next day, and the next, they started again, as if nothing had happened.
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。
I knew I had to do something.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________“It works! The birds are back!” Andy announced.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________8 . Dogs and humans clearly have a special bond. But do dogs, like humans, produce more tears at times when they are flooded with emotion? A new study, which may be the first to look at this question, says that, indeed, the eyes of dogs do well up with tears. In fact, it happens regularly when they’re reunited (团聚) with the owners.
“We found that dogs produce tears associated with positive emotions,” says Takefumi Kikusui of Azabu University in Japan. “We also made the discovery of a chemical, oxytocin, as a possible mechanism (机制) behind it.”
Kikusui and his colleagues made the discovery after one of his two dogs had babies 6 years ago. He noticed that, when his dog was nursing the babies, something changed in the dog’s face — there were tears. Those tears don’t fall as they often do in humans but they do get teary eyes. “That gave me the idea that oxytocin is likely to increase tears,” Kikusui says.
They decided to run a reunification experiment and see if oxytocin brought dogs to tears. First, they used a standard test to measure dogs’ tear volume (量) before and after reuniting with their owners. They found that tear volume indeed ascended when they got back together with the familiar human and not with a person they didn’t know. When they added oxytocin to the dogs’ eyes, their tear volume also increased. That finding supports the idea that the release of oxytocin plays a role in tear production when dogs and their owners get back together. They also asked people to rate pictures of dogs’ faces with and without artificial tears in them, and it turned out that people gave more positive responses when they saw dogs with teary eyes. These findings suggest that dogs’ tear production helps to develop stronger connections between people and their dogs.
Kikusui says they had never heard of the discovery that animals produce tears in joyful situations, such as reuniting with their owners, and that they were all excited that this would be a world first!
1. What’s the author’s purpose in raising the question in the first paragraph?| A．To compare different ideas. |
| B．To express his personal doubt. |
| C．To lead in the topic for discussion. |
| D．To introduce the rich emotions of dogs. |
| A．A lesson at university. | B．An experience of his own. |
| C．The interaction with a dog. | D．A reminder from his colleagues. |
| A．remained unchanged | B．rose |
| C．became zero | D．decreased |
| A．came as a big surprise | B．required further evidence |
| C．were within their expectation | D．were contrary to previous ones |
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One theory could link to how bees use the sun's position to guide their way back, so once the sun sets, they immediately stop moving.
Either way, such strange behavior of bees is
1. What did the scientists do to the road?
| A．They repaired it. | B．They painted it. | C．They blocked it |
| A．It’s warm. | B．It’s brown. | C．It’s smooth. |
| A．To keep the birds there for a whole year. |
| B．To help students study the birds well. |
| C．To prevent the birds from being killed. |
