1 . Humans are no strangers to widespread viruses,and each time a vaccine(疫苗）is developed, it gives us hope for the future. Now, the world is waiting for a vaccine to fight COVID-19.
Scientists worldwide have been rolling up their sleeves to work toward an effective novel coronavirus vaccine.
Under the coordination(协调）of the World Health Organization (WHO),up to 172 countries have been engaging with the "largest and most diverse COVID-19 vaccine portfolio",a plan known as the COVAX Global Vaccines Facility.
COVAX is a system for joint purchasing and balancing the risks of multiple vaccines. When a vaccine proves to be safe and effective, all countries within the facility will be able to access it, according to Xinhua.
The plan is aimed to ensure that all countries, no matter their economic status, can get the vaccine in a timely manner when one is available. It also makes sure that prices will be kept as low as possible.
＂A number of vaccines are now in the final stage of clinical trials," said WHO Director-General Tedros Adhanom Ghebreyesus on Aug 24,adding that the goal of COVAX is to deliver at least 2 billion doses of a vaccine by the end of 2021.
According to the WHO, at present, nine potential vaccines are part of the portfolio.
To guarantee the equal access and fair assignment of COVID-19 vaccines,the WHO has said that the world needs to prevent vaccine nationalism-countries putting their own interests ahead of others in trying to secure supplies of a possible vaccine.
＂Vaccine nationalism only helps the virus,"Tedros said, warning that it would lead to a prolonged pandemic(疫情） if only a small number of countries got most of the supply.
＂Like an orchestra,we need all instruments to be played in harmony to create music that everyone enjoys," he said.
Vaccine development looks promising,as several countries have made great progress. Russia began production of its first batch of a COVID-19 vaccine on Aug 15, according to its health ministry. It's the world's first registered vaccine. Four Chinese vaccine candidates have started international stage-3 clinical trials.
1. Which of the following is true according to the passage?| A．Russia is the first country to have made progress in fighting COVID-19. |
| B．COVAX ensures all the countries get the vaccine at the same time. |
| C．WHO plays an important role in fighting COVID-19. |
| D．Scientist have produced 2 billion doses of vaccines. |
| A．Supportive. |
| B．Critical. |
| C．Optimistic. |
| D．Sympathetic. |
| A．show his deep love for music |
| B．make the passage more interesting |
| C．illustrate the similarities in between |
| D．stress the importance of cooperation |
| A．United for vaccine |
| B．Vaccine on the way |
| C．Fighting against COVID-19 |
| D．Say goodbye to COVID-19 |
2 . Most scientists are now certain that global warming is taking place. Gases such as carbon dioxide are creating a warm blanket around the earth. This blanket is trapping heat in the atmosphere, and so raising the temperature of the earth.
In Europe, eight of the last ten years have seen record high temperatures. On the other hand, the countries around the Mediterranean Sea are receiving even less rain than before. In Sub- Saharan Africa the crops are drying out in the fields and people are dying of starvation. In 1999, the southern United States was struck by a serious of destructive(毁灭性的) hurricanes. Scientists expect such trends to continue, and to worsen, if global warming cannot be stopped.
In addition to worrying about rising global temperatures and extreme weather conditions, scientists are closely monitoring sea levels around the world. They are slowly rising, as the northern and southern polar ice caps start to melt. This will have serious consequences for low-lying countries near the sea. Already parts of these places are disappearing under the rising sea water.
According to a new research, one contradictory feature(特征) of global warming is that it will probably lead to a period of much colder weather. Scientists base their theory on what happened the last time the world warmed up, 8,300 years ago. They have discovered that when the ice melted from the northern polar ice cap it became trapped in a lake in northern Canada. As more ice melted, this lake suddenly burst open, pouring millions of tons of freezing fresh water into the North Atlantic. This flood of water prevented the normal flow of water in the Atlantic, which takes warm water from the tropics(热带地区) north to Europe. When this flow of warm water was cut off, temperatures in Europe dropped by between three and eight degrees over the next 200 years. ''That's the concern here,'' says Richard Alley, an American climate expert. ''The climate hasn't varied much in 8, 000 years. But big changes could come back!''
1. What is the overall effect of global warming on Europe?| A．A warmer climate. | B．A decline in rainfall. |
| C．An increase of hurricanes. | D．A decrease of crop production. |
| A．The rising sea level. | B．The melting of icebergs. |
| C．The increase in disasters. | D．The cause of global warming. |
| A．By offering statistics. | B．By giving an example. |
| C．By making comparisons. | D．By analyzing the process. |
| A．Global climate change will bring more disasters. |
| B．Global warming will likely produce a colder climate. |
| C．Global warming will continue for the next two centuries. |
| D．Global climate will remain unchangeable in the next 8,000 years. |
3 . We are the products of evolution, and not just evolution that occurred billions of years ago. As scientists look deeper into our genes (基因), they are finding examples of human evolution in just the past few thousand years. People in Ethiopian highlands have adapted to living at high altitudes. Cattle -raising people in East Africa and northern Europe have gained a mutation (突变) that helps them digest milk as adults.
On Thursday in an article published in Cell, a team of researchers reported a new kind of adaptation - not to air or to food, but to the ocean. A group of sea-dwelling people in Southeast Asia have evolved into better divers. The Bajau, as these people are known, number in the hundreds of thousands in Indonesia, Malaysia and the Philippines. They have traditionally lived on houseboats; in recent times, they’ve also built houses on stilts (支柱) in coastal waters. “They are simply a stranger to the land,” said Redney C. Jubilado, a University of Hawaii researcher who studies the Bajau.
Dr. Jubilado first met the Bajau while growing up on Samal Island in the Philippines. They made a living as divers, spearfishing or harvesting shellfish. “We were so amazed that they could stay underwater much longer than us local islanders,” Dr. Jubilado said. “I could see them actually walking under the sea.”
In2015, Melissa Ilardo, then a graduate student in genetics at the University of Copenhagen, heard about the Bajau. She wondered if centuries of diving could have led to the evolution of physical characteristics that made the task easier for them. “it seemed like the perfect chance for natural selection to act on a population,” said Dr. Ilardo. She also said there were likely a number of other genes that help the Bajau dive.
1. What does the author want to tell us by the examples in paragraph 1?| A．Environmental adaptation of cattle raisers. | B．New knowledge of human evolution. |
| C．Recent findings of human origin. | D．Significance of food selection. |
| A．In valleys. | B．Near rivers. | C．On the beach. | D．Off the coast. |
| A．They could walk on stilts all day. | B．They had a superb way of fishing. |
| C．They could stay long underwater. | D．They lived on both land and water. |
| A．Bodies Remodeled for a Life at Sea | B．Highlanders’ Survival Skills |
| C．Basic Methods of Genetic Research | D．The World’s Best Divers |
4 . Race walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.
Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing and one foot remain in contact (接触) with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass.
Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.
However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.
As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.
1. Why are race walkers conditioned athletes?| A．They must run long distances. |
| B．They are qualified for the marathon. |
| C．They have to follow special rules. |
| D．They are good at swinging their legs. |
| A．It’s more popular at the Olympics. |
| B．It’s less challenging physically. |
| C．It’s more effective in body building. |
| D．It’s less likely to cause knee injuries. |
| A．Getting experts’ opinions. |
| B．Having a medical checkup. |
| C．Hiring an experienced coach. |
| D．Doing regular exercises. |
| A．Skeptical. | B．Objective. |
| C．Tolerant. | D．Conservative. |
5 . After achieving huge success in the past two seasons, Letters Alive returns with more surprises. The show is performed first on China’s major video platform, v.qq.com, and then is aired on Heilongjiang Satellite TV on Saturdays. Letters penned by celebrities (名人) ages ago, or modern ordinary people, are chosen and then read by today’s stars, striking a chord (引起共鸣) with audiences by presenting human stories.
According to Guan Zhengwen, the show’s chief director, the letters offer a view into universal values. “There is only one standard in our selection. That is, these letters deserve to be seen by more people,” the director said.
“Different cultural backgrounds do exist in the world, but human nature can bridge different cultures. People’s understanding of themselves, others and society can be understood through writing, and that’s the power of letters,” the director said. “Chinese letters are still the mainstay of the program, but the addition of classic letters from abroad is certain to bring more tastes to it,” he added.
As a rule, the 12-episode (一集) culture program has invited many well-known Chinese celebrities. In comparison with the former two seasons, more young artists are taking part this time. “Our program’s viewers under the age of 29 account for more than 75 percent of the total. However, the popularity of celebrities among the young generation is not our selection preference,” Guan said.
Also it is worth noting that the program has added a comment time. Each time a letter is read, a famous commentator sits in the studio and shares his feelings toward the letter and tells viewers the stories behind letters. “The commentators’ views do not stand for the truth, as there are a thousand Hamlets in a thousand people’s eyes,” the director said. “But they, based on their vision and experience, will express positive social energy to viewers.”
1. What does the underlined word “aired” probably mean in the first paragragh?| A．Advertised. | B．Broadcast. |
| C．Sold. | D．Made. |
| A．To make the show more colorful. |
| B．To attract more young audiences. |
| C．To bring more fashion to the program. |
| D．To cover the shortage of Chinese letters. |
| A．Foreign artists will be invited for the first time. |
| B．More stars favored by the young will be chosen. |
| C．There will be an explanation after the reading is finished. |
| D．Viewers will have a chance to read their own letters in the show. |
| A．In an advertisement. | B．In a history textbook. |
| C．In a fashion magazine. | D．In a news report. |
6 . A study has found that middle-aged and older adults who live in greener neighborhoods have a decreased risk of developing metabolic syndrome (代谢综合征) such as obesity, hypertension (高血压) and high blood sugar.
The study, published in Environmental Pollution, was conducted by the Barcelona Institute for Global Health (ISGlobal). It differed from previous studies on the health benefits of green spaces in that it examined all of the symptoms of metabolic syndrome together collectively rather than as individual components. Having metabolic syndrome increases a person’s risk for heart disease, stroke and type 2 diabetes, according to the National Heart, Lung, and Blood Institute.
The study from ISGlobal examined data from clinical examinations of over 6,000 British adults who were between 45 and 69 years old when the study began. The data was derived from four examinations participants went through between 1997 and 2013 that included blood analyses, blood pressure and measurements of weight. “These findings suggest that long-term exposure to green spaces can play an important role in preventing metabolic syndrome as a whole,” according to a press release published by ISGlobal.
The correlation between nearness to green spaces and better health could be associated with the expanded opportunities for physical recreation and lower exposure to air pollution, according to Carmen de Keijzer, ISGlobal researcher and principal author of the study.
Female subjects were more likely than males to exhibit the study’s association between living in greener neighborhoods and having fewer metabolic symptoms. “Women tend to spend more time in their residential neighborhood, which could explain this gender difference,” de Keijzer said. “We need greener cities if we want healthier cities.” de Keijzer added.
1. What do we know about the study from the first two paragraphs?| A．Young people were not included in the study. |
| B．Symptoms were examined one by one. |
| C．It was a joint effort of several institutes. |
| D．It was the first of its kind in decades. |
| A．Departed. | B．Arrived. |
| C．Gained. | D．Demanded. |
| A．Because they differ in gender. |
| B．Because they live in greener cities. |
| C．Because they live in healthier cities. |
| D．Because they stay more in where they live. |
| A．Greener Neighborhoods, Fewer Metabolic Symptoms. |
| B．Women Having Fewer Metabolic Symptoms. |
| C．Metabolic Syndrome Increasing Heart Disease. |
| D．Living in Greener and Healthier Cities. |
7 . Darrell Blatchley, a marine biologist and environmentalist based in the Philippine city of Davao, received a call from the Philippines, Bureau of Fisheries and Aquatic Resources (渔业与水产资源局) early Friday morning reporting a death of a young whale.
When the necropsy (尸检) was performed, Blatchley told NPR, he was not prepared for the amount of plastic they found in the whale’s stomach. “It was full of plastic nothing but nonstop plastic.” he said “It was filled to the point that its stomach was as hard as a baseball.” That means that this animal has been suffering not for days or weeks but for months or even a year or more,” Blatchley added.
Blatchley is the founder and owner of the D’Bone Collector Museum, a natural history museum in Davao. In the coming days, the museum will display all the items found in the whale’s system. Blatchley and his team work with the Bureau of Fisheries and Aquatic Resources and other organizations to assist in rescue and recovery of marine animals.
“Within the last 10 years, we have recovered 61 whales and dolphins just within the Davao Gulf,” he said. “Of them, 57 have died due to man whether they took plastic or fishing nets or other waste, or gotten caught in pollution — and four were pregnant.”
Blatchley said he hoped that the latest incident would launch the issue of plastic pollution in the Philippines and across the globe. “If we keep going this way, it will be more uncommon to see an animal die of natural causes than it is to see an animal die of plastic,” he said.
1. What can be inferred from the second paragraph?| A．The whale was starved to death. |
| B．Blatchley was shocked at what he found. |
| C．The dead whale must have swallowed a baseball. |
| D．Blatchley didn’t make preparations for the necropsy. |
| A．Waste collected from the ocean. |
| B．The whole system of the whale. |
| C．Things found in the whale’s body. |
| D．Many different tools of whaling. |
| A．Uncommon. | B．Worrying. | C．Inspiring. | D．Mild. |
| A．A Whale Found Dead of Plastic |
| B．Stand Up for Protecting Whales |
| C．Plastic Threatening Our Existence |
| D．Natural Death or Merciless Murder |
8 . Measles(麻疹), which once killed 450 children each year and disabled even more, was nearly wiped out in the United States 14 years ago by the universal use of the MMR vaccine(疫苗). But the disease is making a comeback, caused by a growing anti-vaccine movement and misinformation that is spreading quickly. Already this year, 115 measles cases have been reported in the USA, compared with 189 for all of last year.
The numbers might sound small, but they are the leading edge of a dangerous trend. When vaccination rates are very high, as they still are in the nation as a whole, everyone is protected. This is called “herd immunity”, which protects the people who get hurt easily, including those who can’t be vaccinated for medical reasons, babies too young to get vaccinated and people on whom the vaccine doesn’t work.
But herd immunity works only when nearly the whole herd joins in. When some refuse vaccination and seek a free ride, immunity breaks down and everyone is in even bigger danger.
That’s exactly what is happening in small neighborhoods around the country from Orange County, California, where 22 measles cases were reported this month, to Brooklyn, N.Y., where a 17-year-old caused an outbreak last year.
The resistance to vaccine has continued for decades, and it is driven by a real but very small risk. Those who refuse to take that risk selfishly make others suffer.
Making things worse are state laws that make it too easy to opt out(决定不参加) of what are supposed to be required vaccines for all children entering kindergarten. Seventeen states allow parents to get an exemption（豁免), sometimes just by signing a paper saying they personally object to a vaccine.
Now, several states are moving to tighten laws by adding new regulations for opting out. But no one does enough to limit exemptions.
Parents ought to be able to opt out only for limited medical or religious reasons. But personal opinions? Not good enough. Everyone enjoys the life-saving benefits vaccines provide, but they’ll exist only as long as everyone shares in the risks.
1. The first two paragraphs suggest that ____________.| A．a small number of measles cases can start a dangerous trend |
| B．the outbreak of measles attracts the public attention |
| C．anti-vaccine movement has its medical reasons |
| D．information about measles spreads quickly |
| A．exemptions are allowed |
| B．several vaccines are used together |
| C．the whole neighborhood is involved in |
| D．new regulations are added to the state laws |
| A．The overuse of vaccine. |
| B．The lack of medical care. |
| C．The features of measles itself. |
| D．The vaccine opt-outs of some people. |
| A．To introduce the idea of exemption. |
| B．To discuss methods to cure measles. |
| C．To stress the importance of vaccination. |
| D．To appeal for equal rights in medical treatment. |
9 . Three Boys and a Dad
Brad closed the door slowly as Sue left home to visit her mother. Expecting a whole day to relax, he was thinking whether to read the newspaper or watch his favourite TV talk show on his first day off in months. “This will be like a walk in the park.” he’d told his wife. “I’ll look after the kids, and you can go visit your mom.”
Things started well, but just after eight o'clock, his three little “good kids”---Mike, Randy, and Alex --- came down the stairs in their night clothes and shouted “breakfast, daddy.” When food had not appeared on within thirty seconds, Randy began using his spoon on Alex’s head as if it were a drum. Alex started to shout loudly in time to the beat(节拍) . Mike chanted “Where’s my toast, where’s my toast” in the background. Brad realized his newspaper would have to wait for a few seconds.
Life became worse after breakfast. Mike wore Randy’s underwear on his head. Randy locked himself in the bathroom, while Alex shouted again because he was going to wet his pants. Nobody could find clean socks, although they were before their eyes. Someone named “Not me” had spilled a whole glass of orange juice into the basket of clean clothes. Brad knew the talk show had already started.
By ten o'clock, things were out of control. Alex was wondering why the fish in the fish bowl refused his bread and butter. Mike was trying to show off his talent by decorating kitchen wall with his color pencils. Randy, thankfully, appeared to be reading quietly in the sitting room, but closer examination showed that he was eating apple jam straight from the bottle with his hands. Brad realized that the talk show was over and reading would be impossible.
At exactly 11:17, Brad called the daycare center(日托所).“I suddenly have to go into work and my wife is away. Can I bring the boys over in a few minutes?” The answer was obviously “yes” because Brad was smiling.
1. When his wife left home, Brad expected___________.| A．go out for a walk in the park |
| B．watch TV talk show with his children |
| C．enjoy his first day off the work. |
| D．read the newspaper to his children |
| A．Drawing on the wall | B．Eating apple jam |
| C．Feeding the fish | D．Reading in a room |
| A．Because he wanted to clean his house. |
| B．Because he suddenly had to go to his office |
| C．Because he found it hard to manage his boys |
| D．Because he had to take his wife back home. |
| A．by space | B．by comparison |
| C．by process | D．by time |
