1 . The New South Wales government used planes to drop more than 4,000 pounds of carrots and sweet potatoes, to the forests which are damaged by the recent wildfires. The fires are reported to have killed more than a billion wild animals and destroyed a land of more than 84 thousand square kilometers—about twice the size of Maryland. What is worse, most Australians are worrying about when the wildfires will be fully put out.
“The home of several important wallabies (沙袋鼠) was burnt in the recent fires,” New South Wales Environment Minister Matt Kean said on Sunday. Kean said the drops are what wallabies need. The plan is designed to help wallabies and allow them to recover.
Fire seasons often take place in the country, but this year the fires have been quite devastating. The country experienced one of its hottest and driest years, which made it harder to put out the fires. Besides wild animals, the fires have taken the lives of at least 25 people and destroyed more than 2,000 homes.
“I think there’s nothing to compare with the damage that’s going on over such a large area so quickly. It’s a big event in terms of geography and the number of wild animals,” Dickman, an animal protection expert, said in an interview with NPR last week.
“We know that the number of Australian wild animals has been going down over the last several decades, and it’s probably fairly well known that Australia’s got the world’s highest rate of extinction of animals,” he added. “It’s events like this that may increase the speed of extinction of a lot of other animals. So, it’s very sad time. Everyone has to try their best to do something for them.”
1. Why did the Australian government drop potatoes?| A．To feed the animals. | B．To trap the animals. |
| C．To plant potatoes there. | D．To help the people. |
| A．Damaging. | B．Interesting. |
| C．Surprising. | D．Tiring. |
| A．They have been under control. |
| B．The weather is helpful in putting out them. |
| C．They have killed a small amount of wildlife. |
| D．They have greatly influenced both people and animals. |
| A．Australia has a lot of wildlife. |
| B．Australians have suffered a lot. |
| C．Australians should protect the wildlife. |
| D．The government is responsible for the wildfires. |
2 . The first wave of a new class of anti-aging drugs have begun human testing. These drugs won't let you live longer but aim to treat specific illnesses by slowing a fundamental process of aging.
The drugs are called senolytics—they work by removing certain cells that accumulate as we age. Known as “senescent” cells, they can create low-level inflammation (炎症) that prevents normal systems of living cells repair and creates a poisonous environment for neighboring cells.
In June, San Francisco - based Unity Biotechnology reported initial results in patients with mild to severe osteoarthritis (关节炎) of the knee. Results from a larger clinical trial are expected in the second half of this year. The company is also developing similar drugs to treat age-related diseases of the eyes and lungs, among other conditions.
Senolytics are now in human tests, along with a number of other promising approaches targeting the biological processes that lie at the root of aging and various diseases.
A company called Alkahest injects patients with components found in young people's blood and says it hopes to stop conscious and functional decline in patients suffering from mild to moderate Alzheimer's disease. The company also has drugs for Parkinson's and dementia in human testing.
And in December, researchers at Drexel University College of Medicine even tried to see if a cream including the immune-suppressing drug could slow aging in human skin.
The tests reflect researchers' expanding efforts to learn if the many diseases associated with getting older- such as heart diseases, arthritis, cancer, and dementia- can be dealt with to delay their outbreak.
1. Why do the researchers develop the drugs?| A．To rid inflammation. | B．To lengthen people's life. |
| C．To treat age-related diseases. | D．To remove cancer cells. |
| A．Repairing. | B．Cycling. | C．Aging. | D．Dividing. |
| A．By listing data. | B．By providing details. |
| C．By making comparisons. | D．By analyzing causes. |
| A．A diary. | B．A guidebook. | C．A novel. | D．A magazine. |
3 . Any foreigner who has tried to learn Chinese can tell how hard it is to master the tones required to speak and understand. And anyone who has tried to learn to play the violin or other instruments can report similar challenges.
Now researchers have found that people with musical training have an easier time learning Chinese. Writing in the online edition of Nature Neuroscience，researchers from Northwestern University say that both skills draw on the same parts of the brain that help people discover changes in pitch(音调).
One of the study's authors，Nina Kraus，said the findings suggested that studying music “actually tunes our sensory system”.This means that schools that want children to do well in languages should hesitate before cutting music programs，Dr. Kraus said. She said music training might also help children with language problems.
Mandarin(普通话)speakers have been shown to have a more complex encoding(编码) of pitch patterns in their brains than English speakers do. This is because in Mandarin and other Asian languages，pitch plays a central role. A singlesyllable word can have several meanings depending on how it is intoned.
For this study，the researchers looked at 20 nonChinese speaking volunteers，half with no musical background and half who have studied an instrument for at least six years.
As they were shown a movie，the volunteers also heard an audio tape of the Mandarin word “mi” in three of its meanings:squint，bewilder and rice. The researchers recorded activities in their brain stems to see how well they were processing the sounds. Those with a music background showed much more brain activities in response to the Chinese sounds.
The lead author of the study，Patrick C.M.Wong，said it might work both ways. It appears that native speakers of tonal languages may do better at learning instruments.
1. When learning Chinese，a foreigner will find ________.| A．he has a difficult time learning music at the same time |
| B．he has an easier time learning music at the same time |
| C．it is hard to master the tones required to speak and understand |
| D．it is easy to use the brain to help him discover changes in pitch |
| A．Because there is the same difficulty in learning Chinese and music. |
| B．Because skills to learn the two make use of the same parts of the brain. |
| C．Because music training might help people with language study. |
| D．Because people who do well in Chinese study do well in music. |
| A．created | B．spelled | C．seemed | D．pronounced |
| A．Mandarin Speakers Are Smarter than English Speakers |
| B．Skilled Ear for Music May Help Language Study |
| C．Pitch Plays a Central Role in Chinese Learning |
| D．Schools Need to Develop Music Programs |
4 . The Land Under the Sea
Ten thousand years ago, as the last ice age ended, sea levels around the world were far lower than they are today. Much of the land under both the North Sea to the east of Britain and the English Channel which now separates France and Britain was part of a huge region of forests and grassy plains. Then the climate gradually became warmer and the water trapped in large masses of ice was released.
Now the development of advanced sonar (声呐) technology, known as bathymetry, is making it possible to study this flooded landscape in extraordinary detail. A special echo (回声) sounder is fixed to the bottom of a survey ship and it makes wide sweeps across the seabed. While previous technology has only been able to produce two-dimensional images, bathymetry can now use computers, satellite-positioning equipment and special software to create accurate and remarkably detailed maps. For the first time, an ancient riverbed jumps out of the three-dimensional image. The site of pre-historic settlements can now be pinpointed.
According to expert Linda Andrews, this technological development is of huge significance. “We now have the ability to map the seabed as accurately as we can map dry land,” she says.
Once bathymetric techniques have identified sites where people might have built their homes and villages, divers can be sent down to investigate further. Robot submarines (潜艇) can also be used, and researchers hope they will find stone tools and wood from houses as proof of human activity. The idea shared by many people in Britain of their country as a natural island kingdom will be challenged by the findings: Britain has been inhabited for about 500,000 years and much of this time it has been linked on and off to continental Europe. It remains to be seen how far this new awareness is taken on board, however.
In fact, the use of bathymetry will not be limited to the study of lost landscapes and ancient settlements. It will also be vital in finding ships that have been destroyed in accidents. In addition, commercial applications are a real possibility. Aggregates (骨材) for the construction industry are becoming increasingly expensive, and bathymetry can be used to identify suitable sites for digging for this material. Mapping the seabed will also identify places where rare plants and shellfish are living. Digging at such sites should be prevented, either to work for a profit or to make deeper waterways for massive container ships.
1. How does bathymetry work?| A．It has an echo sounder placed on the seabed. |
| B．It makes use of a number of different devices. |
| C．It produces two-dimensional images of the sea floor. |
| D．It bases its calculations on the location of construction sites. |
| A．Occupied. | B．Adjusted. |
| C．Rebuilt. | D．Discovered. |
| A．attract investment in the research under the sea |
| B．inspire people to take an interest in modern technology |
| C．adapt the attitudes of the British to their country’s history |
| D．receive confirmation of rebuilding ancient man-made objects |
| A．identify new species of plants and animals |
| B．provide the precise location of sunken ships |
| C．evaluate the cost of seeking certain resources |
| D．promote the development of deeper waterways |
5 . A large number of people want to grow their own garden, but they simply do not have the room. Do not worry. There is a solution. Consider container gardening.
The great thing about container gardening is that you can use a variety of different containers. You simply have to use your imagination. You could create a beautiful garden with things such as cement blocks, hanging baskets, clay pots, or window boxes. There are so many options when it comes to container gardening; it is only limited by your imagination.
Of course, you will want to take the following into consideration when you are ready to begin container gardening, in order for it to be successful.
First, you should avoid any containers that have been used to store chemicals, as well as treated wood. This could lead to the sudden death of your flowers and lead to the failure of your container gardening.
With any container that you choose, you need to ensure that it allows the water in it to drain when necessary. So it may be important for you to create holes in the container to help this along. You should also make sure the containers are placed on a raised surface, not upon the floor, to ensure the best possible drainage.
Ensure that the containers you choose are appropriate (合适的) in size for the plants you choose. You need to prevent the roots from overgrowing the container.
If you like fresh veggies, you could consider container gardening with vegetables. This requires a process that differs from that of flower gardening. Talk to an employee at a supply store in your area. They can help you choose the right containers for the vegetables you are wishing to grow.
1. Which of the following may be improper materials for container gardening?| A．Cement blocks. | B．Treated wood. |
| C．Window boxes. | D．Clay pots. |
| A．To pick up. | B．To give up. |
| C．To flow away. | D．To gain popularity. |
| A．It needs special containers. | B．It requires more time. |
| C．It demands more water. | D．It seems much easier. |
| A．People who have a big yard. |
| B．Citizens who enjoy gardening. |
| C．Farmers who are good at gardening. |
| D．Children who like outdoor activities. |
6 . A new study, published this week in the journal Frontiers in Veterinary Science, reveals that non-human animals' tears are not so different from our own. The chemical similarities are so great, in fact, that the composition of other species' tears—and how they're adapted to their environments-may provide insights into better treatments for human eye disease.
Previously, scientists had studied closely only the tears of a handful of mammals, including humans, dogs, horses, camels, and monkeys. In the new study, Brazilian veterinarians analyzed the tears of reptiles and birds for the first time , focusing on seven species.
Tears, which are released from tear tubes, form a film over the eye that's composed of three ingredients: mucus, waler, and oil. The mucus coats the eyes surface and helps to attach the film to the eye, the water is a natural salty solution containing crucial proteins and minerals, and the oil prevents the eye from drying out.
Humans are the only known species to produce emotional tears; the expression "crocodile tears," which refers to a person's phony display of emotion, comes from the mysterious tendency of crocodiles to release tears as they eat.
But tears play key roles beyond weeping, notes Lionel Sebbag at Iowa State University, who was not involved in the new research. They help with vision by lubricating and clearing the eye. They also protect the eye against infection and provide nutrition to the cornea, the eye's clear outer layer, which lacks blood tubes, he says.
Learning how reptiles and birds' use tears may also inspire new medications for conditions such as dry eye, which occurs when tear tubes don't produce enough oil. The disease, common in cats, dogs, and people, can sometimes lead to blindness.
1. What is paragraph 3 mainly about?| A．The source of tears. | B．The composition of tears. |
| C．The classification of tears, | D．The definition of tears. |
| A．Tricky. | B．Regretful. | C．Cold. | D．False. |
| A．Weeping contributes to eye disease. | B．The cornea has rich blood tubes. |
| C．Tears oil and clear the eyes. | D．More tears mean better vision. |
| A．Tears, a barrier to eyes | B．A better treatment for eye disease |
| C．Non-human tears promise new cures | D．Other species’ tears are similar to humans' |
7 . Have you ever heard about Black Friday and Cyber Monday? Surely, they are all about finding the best deals on holiday gifts for yourself and family members. And have you heard about GivingTuesday? Here is something about it!
GivingTuesday is observed annually on the Tuesday after Thanksgiving, which encourages people to help those in need by making financial donations or doing good in their local community. The “Global Day of Giving” was started in 2012 by New York City nonprofit 92nd Street Y and the United Nations Foundation.
Unlike Black Friday, GivingTuesday serves a more altruistic purpose. In its first year, the movement brought in almost $10 million for charities, and things have only improved since. In 2019, many GivingTuesday social media campaigns worldwide helped raise an amazing $ 1.9 billion from 27 million donors! Over the past five years, many higher education institutions have also been using the Tuesday after Thanksgiving to ask alumni for donations. In 2019, the University of Michigan, which calls it Blueday, received 5887 gifts totaling over $4 million, while Pennsylvania State University raised $710 000 to benefit over 85 University programs.
Though donating money certainly helps, there are many other ways to support the great cause, especially during the COVID-19 pandemic. You can video tutor kids struggling with online learning, or team up with an adult to get groceries or medications for an elderly neighbor. Alternatively, call on your peers to help you with a service project that addresses an issue close to your heart, or pick one from the several ideas suggested on the GivingTuesday website. You can also donate your gently-used clothes and toys to local shelters, or mail a handwritten note to a grandparent or a friend you miss seeing.
What are you going to do to make a positive difference in your community on GivingTuesday? Let us know by adding your comments below!
1. Why does the author mention Black Friday and Cyber Monday in Paragraph 1?| A．To make a comparison. | B．To lead to the topic. |
| C．To arouse readers’ interest. | D．To express his doubt. |
| A．To promote the development of economy. | B．To attract people to buy more holiday gifts. |
| C．To call on more universities to donate money. | D．To encourage people to help those in need. |
| A．Selfless. | B．General. | C．Specific. | D．Complex. |
| A．Where people can offer their kind help. | B．What people can do on GivingTuesday. |
| C．How people can stay safe during COVID-19. | D．Why people need to support the great cause. |
8 . The Indian government declared an “emergency situation” in New Delhi on Sunday as air pollution hit dangerous new highs and people had the selfies(自拍) to prove it.
Officials announced a series of measures to fight against smog in the capital city, including halting construction projects, closing a coal-fired power factory for 10 days and washing the dusty roads. The citizens，meanwhile，took “smog selfies” as they walked through dirty air which could taste and smell. Some selfie photographers joined hundreds of protesters in downtown New Delhi to demand that the government deal with the deadly smog.
New Delhi, already one of the world’s dirtiest cities, is experiencing its worst smog in nearly two decades. The city saw levels of PM2.5 of more than 900 micrograms per cubic meter on Saturday. That’s more than 90 times the level that the World Health Organization considers safe and is 15 times higher than the Indian government’s standards.
Particulate(微粒的) matter comes from vehicles, coal factories, burning trash piles, dust and other sources. New Delhi’s severe pollution was initially blamed on the widespread bursting of firecrackers during the festival Diwali. But images published by NASA last week suggested that crop burning in the neighboring states of Punjab and Haryana could be the reason for the increasing levels of PM2.5. New Delhi’s chief minister, Arvind Kejriwal, said that farmers in those states begin burning straw at the start of every winter to clear their plants for planting wheat.
The pollution can lead to lung cancer, heart disease and related illnesses, particularly in growing children. Kejriwal said people should avoid going outdoors until the pollution levels drop and should work at home as much as possible. Of course, they should put down the selfie sticks, too.
1. What does the underlined word “halting” in Paragraph 2 meap?| A．Stopping. | B．Encouraging. | C．Protecting. | D．Changing. |
| A．The poor condition in New Delhi has led to a strike. |
| B．New Delhi is one of the most polluted cities in the world. |
| C．A lot of people especially children died of smog in New Delhi. |
| D．Kejriwal suggested that people stop working to deal with smog. |
| A．Images of people living in New Delhi. |
| B．Levels of PM2.5 in most cities of India. |
| C．Sources of particulate matter in New Delhi. |
| D．Measures taken by the New Delhi government. |
| A．Doubtful. | B．Supportive. | C．Uncaring. | D．Opposed. |
9 . I worked in a small drug store when I was very small. I worked long and hard because that was my father’s store. I treasured my lunch breaks, not for the food or the rest, but for reading comic books about superheroes. And I could read comic books only during my lunch breaks.
Now I close my eyes and think back, I know what I wanted to be when I was a small kid—a superhero! Superman, Batman, Spider-Man and Iron Man were some of my heroes. In all of the comic books that I read, there were two patterns.
First, there was always a battle between good and evil. The battle was always tough. No matter how strong or how many powers the superhero had, evil could almost defeat him. Second, the superhero was never paid for his contribution to society. Superman made money as Clark Kent, a newspaper reporter. Batman made money as Bruce Wayne, a rich businessman. Spider-Man made money as Peter Parker, a photographer. Iron Man made money as Tony Stark, a rich scientist. None of them was paid for keeping peace or helping others.
The real superheroes don’t get paid for what they do for society!
I clean the local park with my friends every weekend. I help cheer up kids in the hospital. I send food to disabled people. I don’t get paid for doing these in my free time. It’s correct to be fairly compensated but I simply choose not to. I feel my dream has come true!
Volunteering and helping people without getting paid is what superheroes do. You can be a superhero, too.
1. Why did the writer value the lunch breaks?| A．He could take delicious food. | B．He could free from the hard work. |
| C．He could do what he liked to do. | D．He could act as a superhero. |
| A．rewarded | B．refused | C．admitted | D．bargained |
| A．By working hard in the store. | B．By performing voluntary work. |
| C．By doing a lot of reading. | D．By choosing the right job. |
| A．Volunteering is fun. | B．Comic books and my childhood. |
| C．Be a superhero. | D．Do superheroes get paid? |
10 . Killer whales, or orcas, are known for their severe attacks on sea animals but they have never posed a threat to humans. However, since late July, the normally social animals have been intentionally attacking sailboats off the coasts of Spain and Portugal.
The strange behavior first surfaced on July 29, 2020, when a 46-foot boat was repeatedly attacked for almost an hour by nine orcas, causing the boat to rotate(旋转) 180 degrees and having its engine switched off. Since then, over 30 more similar incidents have been reported. On September 23, 2020, Spain's government banned boats of less than 50 feet in length from sailing in the 60-mile stretch of the Atlantic coastline between Ferrol and the Estaca de Bares Cape, where the attacks have been occurring.
Researchers across the world are trying to explain the orcas' behavior. Some believe it could be a result of the overfishing of the bluefish tuna - the orcas' primary food source -which has left the area's killer whales starving and unable to feed their babies. "I saw them look at boats carrying fish. I think they know humans are somehow related to food shortages, "says Ken Balcomb, senior scientist at the Center for Whale Research in Washington, USA. The environmentalists believe the sudden increase in boat traffic and fishing activities, after months of absence due to restrictions on human activity last spring, could also be contributing to the agitation.
However, Alfredo López, a biology professor in Galicia, Spain, thinks the attacks are defensive measures the orcas adopted to protect themselves against boat injuries. The researcher came to this conclusion after looking at the of the videos of a few incidents and noticing that two of the young killer whales involved had serious injuries. Hopefully, the experts will be able to find a way to restore the harmony between the animals and the humans soon.
1. What do we know about orcas in paragraph 1?| A．They are friendly to humans. | B．They have changed their behavior. |
| C．They are famous for hunting skills | D．They have met tough living conditions. |
| A．Ken Balcomb. | B．The environmentalists. |
| C．Alfredo López. | D．Spain's government. |
| A．The attacks. | B．Food shortages. | C．The overfishing. | D．Human activities. |
| A．How do killer whales attack humans? |
| B．Why Are Killer Whales attacking Boats? |
| C．How can we live in harmony with animals? |
| D．Why are boats banned from sailing on the sea? |
