1 . Americans spend billions on vitamins, multivitamins for their health, but a review of numerous studies concluded there is little to no evidence that some of those vitamins prevent heart disease, cancer or death.
The report, released by the U.S. Preventive Services Task Force last week, concluded that “recent evidence is not enough” to determine whether vitamins actually help or hurt your health, based on 84 studies, 52 of which were done since 2014. Vitamins examined included vitamins A, B, C, D and E, as well as other multivitamins.
“Our suggestion is neither for nor against taking vitamins, or combinations of those nutrients (营养物质). We just don’t have enough evidence,” said Dr. John Wong, a doctor in the Department of Medicine at Tufts Medical Center who was involved in the report.
While the finding is that vitamins don’t have any benefits to “healthy, non-pregnant (未怀孕) adults”, it doesn’t apply to “children, people who are pregnant or may become pregnant, or people who are hospitalized.”
The Task Force admitted it makes sense that people would take vitamins in hopes of health benefits, as some shortage may lead to illness. But experts agreed the best way to get good health and prevent cancer is a balanced diet and regular physical activity.
“The suggestion across all organizations about vitamins is to eat a balanced diet, and then the key tends to be on plenty of fruit and vegetables and less junk foods,” Wong said.
Wong added people should refer to their health doctors to determine if any vitamins are worth taking. He said this suggestion should also serve as a need to further research into proving the official benefits and risks for each vitamin.
1. Why can’t we say whether vitamins really benefit or harm health?| A．Because they really have no benefit. |
| B．Because many studies have proved it. |
| C．Because evidence is not enough at present. |
| D．Because Dr. John Wong wasn’t involved in the research. |
| A．Vitamins are of no benefit to anyone. |
| B．Vitamins are beneficial to healthy adults. |
| C．Children can’t take vitamins though they are in hospital. |
| D．People could take vitamins if lack of vitamin may tend to illness. |
| A．Taking enough vitamins. |
| B．Eating more packaged foods. |
| C．Following their health doctor’s advice. |
| D．Having a balanced diet and doing exercise. |
| A．Taking Vitamins: No Benefit to People |
| B．Doctor’s Advice on Buying Vitamins |
| C．Taking Vitamins: Likely to Waste Money |
| D．Americans Spending More Money on Vitamins |
2 . In looking through your social media, there’s a good chance you’ve noticed pictures accompanied by texts. The pictures are likely made possible by a text-to-image program called DALL-E. For example, Twitter user posted a tweet with the text, “To be or not to be, rabbi holding avocado, marble sculpture.” Then a matching picture appears below.
The AI models come from Google’s Imagen software as well as OpenAI. a start-up backed by Microsoft. On its website, OpenAI calls DALL-E “a new Al system that can create realistic images and art from a description in natural language.” But most of what’s happening in this area is coming from a relatively small group of people sharing their pictures. That’s because Google and OpenAI have not made the technology broadly available to the public.
The text-to-picture services identify the most important parts of a user’s text and then guess the best way to picture those terms. There’s generally a text box, a button to start the generation process and an area below to display images. To indicate the source. Google and OpenAI add watermarks in the bottom right comer of images from DALL-E and Imagen.
Engineers trained the models on various collections of words and pictures from the web. OpenAI recognizes the potential for harm that could come from a model. To avoid the risk, employees removed violent content from training data, and there are filters（筛选）stopping DALL-E from producing images if users submit（提交）violent or illegal content.
Boris Dayma, a developer from Texas spelled out the problems in an explanation of their software. Despite the risks, Dhariwal, a research scientist at OpenAI, said it could open up creative opportunities for individuals and could help with commercial applications for dressing up websites. Results should continue to improve over time.
| A．Beautifying pictures at users’ request. |
| B．Producing pictures from human words. |
| C．Changing pictures into vivid descriptions. |
| D．Providing pictures for users to choose from. |
| A．Its users’ rights. | B．Its operating conditions |
| C．Its working process. | D．Its company’s prospect. |
| A．All images come from a unified model. |
| B．The training data is selected beforehand. |
| C．Improper requests can’t be submitted. |
| D．Filters remove the unhealthy description. |
| A．Positive. | B．Objective. | C．Uncertain. | D．Worried. |
3 . Picture the scene: you’ve spent years working towards a very specific goal. You’ve put in countless hours of work and made many efforts along the way, but now that you’ve got there it doesn’t feel quite like you imagined. Instead of celebration, you feel emptiness, confusion and doubt.
Welcome to the anti-climax. The often-experienced but seldom-discussed downside of achieving life’s biggest milestones. Many of us work tirelessly towards our goals. We may spend our lives dreaming of the day we get married, publish our first hook or buy our first home. However, oftentimes, when we achieve these things it doesn’t feel quite as expected. In fact, the achievement of these goals feels a bit of a letdown.
So why do we often experience an anti-climax with big goals, even though we’re happy to achieve them? “An anti-climax can be an unexpected by-product of a milestone achievement. Usually, the more significant the milestone, the greater the anti-climax may be. The intensity（强度）of an anti-climax often relies on what we expect of this achievement.” says Rachel Vora. a psychotherapist（心理治疗师）.“The journey to achieving a milestone can he exciting and tiring in addition to giving us a sense of purpose and focus. Therefore, when this disappears overnight. we can often feel lost and confused, in spite of feeling proud of our achievement.
When this happens it can contribute to a mixture of emotions. We often falsely believe that we’ll feel completely different afterwards or that our feelings of low self-worth will disappear, but this is rarely the case. “Clients（客户）often present to me with an extremely great sense of ‘is this it?’ and ‘what now?’.” says Vora. “These feelings of confusion and disappointment, if let ignored, have the potential to cause clients to be in low spirits, or even worse.”
1. Why does the author mention the examples in paragraph 2?| A．To present a fact. | B．To prove a rule. |
| C．To explain a term. | D．To make a prediction. |
| A．Low self-worth. | B．High expectations. |
| C．Sense of purpose. | D．Unexpected achievements. |
| A．Amy felt empty before giving a speech. |
| B．Jack felt lost after his first novel came out. |
| C．Mary felt proud when she joined a ballet club. |
| D．Tom felt doubtful about taking further education. |
| A．How to hold back feelings. |
| B．How to improve self-worth. |
| C．Hon to identify the anti-climax. |
| D．How to deal with the anti-climax. |
4 . Banff National Park is home to an amazing wildlife population. But the busy Trans Canada Highway that cuts through the park is a hazard to the lovely animals. To address the problem, Banff first put-up wildlife fencing on either side of the highway to discourage animals from entering the busy road. Then, since 1996, they’ve opened six wildlife overpasses and 38 underpasses to help the animals cross the highway in safety. I was fortunate to visit Banff’s Red Earth Overpass with Trevor Kinley, the project manager with Parks Canada. He told me that so far, they have documented 10, 000 safe animal crossings on this overpass alone. “ Some animals have learned how to use the crossings much more quickly than others. Black bears are the fastest learners, followed by deer. Wolves and lions take the longest to work out how to use them, ” Kinley said, laughing. “ But those animals that are slower to adapt are usually more capable and determined at figuring out the safest way to cross those overpasses and underpasses. ”
There is some criticism (批评) that channeling so much wildlife into a few bridges and tunnels is like making a trap for the animals, offering big animals an easy meal on either side. “ But research has shown that this is not the case, ” Kinley assured me. “ There are no more killings around the crossings than there are anywhere else in the park. ”
Walking over the Trans Canada and then walking underneath through one of the tunnels, I was amazed to see the fresh tracks of black bears, wolves, deer and many kinds of smaller animals. Somehow, all these animal footprints made me so happy, knowing that all this wildlife was passing safely under and over the longest road in Canada.
Hopefully, the success of the wildlife crossings in Banff will continue to inspire similar solutions around the world, where human pressure on wildlife continues to grow.
1. Which of the following best explains “ hazard ” underlined in paragraph 1?| A．Shelter. | B．Message. | C．Answer. | D．Danger. |
| A．They are stupid animals. | B．They are cautious learners. |
| C．They are very dangerous. | D．They are good at adapting. |
| A．There are too many bridges and tunnels. | B．Many animals will not use the crossings. |
| C．More killings might happen at the crossings. | D．Illegal hunting might be encouraged in the park. |
| A．Concerned. | B．Disappointed. | C．Shocked. | D．Delighted. |
5 . Sites for a family getaway
A selection of campsites perfect for a family break to enjoy time with the children.
Monkton Wyld Holiday Park
Monkton Wyld is the perfect campsite for children, yet maintaining a quiet atmosphere for adults to relax. here are walking routes from Monkton Wyld Holiday Park to Lyme Regis where little ones can enjoy the beaches and hunting for fossils (化石). Adults might wander selection of shops and restaurants.
High Moor Farm Park
High Moor Farm Park is situated four miles from Harrogate at High Moor Farm there is plenty to occupy all ages, including an indoor pool, nine-hole golf course, play area, pool tables and fishing lake. A 20-minute drive from the park is Knaresborough where there are many zoos including Yorkshire Dales National Park, Dartmoor Zoological Park and Paignton Zoo.
Polmanter Touring Park
This award-winning touring site is ideal for families looking for on-site entertainment and the convenience of the fishing town of St lves within waking distance.
For younger guests, there are two playgrounds indoor soft play and a games room. Practicalities are taken care of with an on-site shop, bar and restaurant, and four-legged family members have a devoted exercise field and shower.
Elie Holiday Park
Elie Holiday Park occupies a location behind a wide expanse of dunes (沙丘) that lead to a vast beach on Scotland’s west coast. Appealing to those travelling with children, the coastal location is ideal for anyone who loves to be beside the sea.
Aldult guests can walk the coastal path, go rock-pooling, and look out for wildlife. Youngsters can go wild at the Robinson Crusoe Adventure Park and enjoy the arcades in the games room.
1. Where can you go if you are interested in animals?| A．High Moor Farm Park. | B．Dartmoor Zoological Park. |
| C．Monkton Wyld Holiday Park. | D．Robinson Crusoe Adventure Park |
| A．It is far from the fishing town. | B．It wins awards for entertainment. |
| C．It is an ideal place for running a bar. | D．It provides essential services for pets |
| A．Play adventure games | B．Hunt for wild animals |
| C．Make a study of dunes. | D．Search for the fossils |
6 . Different countries celebrate Christmas in different ways. We asked some of our friends to explain what happens in their countries. This is what they told us:
France
In France, Christmas is always called Noël. Everyone has a Christmas tree, sometimes decorated in the old way with red ribbons and real white wax candles. Fir trees in the garden are often decorated too with lights on all night.
Father Christmas is called Père Noël. The Christmas meal is an important family gathering with good meat and the best wine. Few people send Christmas cards. More people send New Year cards to wish everyone good luck and joy for the New Year. These days Christmas lunch is a starter of foie gras (a strong tasting pate made from goose liver) followed by lunch of seafood — usually including lobsters and oysters.
New Zealand
Christmas starts for us with gifts under the tree, to be opened on Christmas morning. Then it’s onto a Christmas lunch either at home or at one’s parents place. Turkey or chicken with all the trimmings (佐料) is eaten. Then comes tea time. It is a BBQ for friends and family to get together, and have a few beers or wines with the meal!
Russia
In the days of the Soviet Union, Christmas was not celebrated very much. New Year was the important time — when “Father Frost” brought presents to children. With the fall of Communism, Christmas can be openly celebrated either on December 25th; or more often on January 7th. This unusual date is because the Russian Orthodox church uses the old “Julian” calendar for religious celebration days. Special Christmas food includes cakes, pies and “meat dumplings”.
Sweden
The most important day is Christmas Eve. A special Christmas meal is eaten on Christmas Eve — ham (pork), herring fish, and brown beans — and this is the time when families give presents to each other. Many people attend a church meeting early on Christmas Day.
1. Why do people in France send New Year cards?| A．To tell their friends the New Year is coming. |
| B．To ask for some special presents. |
| C．To invite their friends to family gathering. |
| D．To send their friends best wishes and happiness for the New Year. |
| A．A special meal is prepared. |
| B．Everyone has a Christmas tree. |
| C．Parents give gifts to their children. |
| D．People attend a church gathering. |
| A．France. | B．New Zealand. | C．Sweden. | D．Russia. |
7 . Food waste is a growing problem both in America and across the globe. In North America alone about 30-40% of food ends up as rubbish each year. While much ends up as rubbish, over 48 million Americans live in households that do not have enough food! Now, concerned citizens are trying to raise awareness of the issue with some creative ideas.
In New York’s Westchester County, students at 18 schools join in a program called We Future Cycle. Started by Anna and Ashley in 2014, it teaches kids to recycle, compost (堆肥), and most importantly control food waste in an easy and efficient manner.
Lunch areas at those schools are equipped with three clearly marked bins— compost, recycle and share. While the first two are common in schools, the third is rare. This is the bin where kids can put their unwanted drinks, fruits, and even untouched sandwiches. Food there is available for any student that wants them. Whatever remains at the end of the day is given to the local soup kitchen or food bank. Anna says the three bins have helped reduce the number of trash bags produced at the mid-day meal from an average of 22 to just 2!
To ensure kids form similar habits at home, the non-profit has created plans to educate families about the importance of sorting waste into the proper streams of recycling, composting, and food to donate. They also urge parents to have open conversations with their kids about food choices.
Kids are not the only ones that waste food. Adults are equally bad, if not worse! To fight that, Brooklyn-based Josh founded Salvage Super Club in 2014. The randomly organized dinners promise customers a multi-course meal for merely 50 dollars per person. The delicious food is made from perfectly safe ingredients (成分) that are past their prime and, therefore, headed for the compost or trash bin.
1. The underlined word “awareness” in Paragraph 1 probably means__________?| A．understanding | B．hope |
| C．doubt | D．value |
| A．Use dustbins instead of plastic bags for left-over food. |
| B．Put their unwanted food in the bins and learn to share. |
| C．Get the children to educate their parents at home. |
| D．Only get single-course food for 50 dollars when eating out. |
| A．Parents are to blame for the children’s bad habits. |
| B．Parents do not encourage children to save food. |
| C．Parents are as wasteful as children about food. |
| D．Parents have set an example for the children. |
| A．More information about food bank. | B．How to improve food production. |
| C．The importance of saving food. | D．Other creative ways to save food. |
8 . Are you relatively skinny but growing a “beer belly”?
Then don’t be surprised at your next checkup if the nurse measures your waistline to determine your healthy weight. That’s because research is showing that a protruding (鼓出的) belly may be a sign of VAT — a dangerous form of fat around organs deep inside your body. “Studies confirm that visceral (内脏的) fat is a clear health risk,” said Dr. Tiffany Wiley, a senior expert at the National Institutes of Health in Bethesda, Maryland. Unlike the fat just under your skin, visceral fat raises your risk for heart disease. Experts think that’s because visceral fat raises blood pressure and inflames (使发炎) tissues and organs.
However, you can’t assume you’re safe from visceral fat if your overall weight is healthy, experts stress. That’s because you can have dangerous visceral fat even if you’re not considered overweight — and not have any visceral fat even if you are overweight.
How do you know if your stomach is protruding into dangerous size? Do a check. Non-pregnant women with a waist size greater than 88 cm and men with a waist larger than 102 cm, are at higher risk according to the US Centers for Disease Control and Prevention. If you’re Asian, it drops to 80 cm for women and 90 cm for men. But it is only a rough measure. “The only sure way to know is to check your visceral fat levels on a CT scan or MRI,” say experts.
According to the AHA committee, the most salutary physical activity to “shrink” belly is aerobic exercise. Aerobic means “with oxygen”, so aerobic exercise increases your breathing rate and promotes the circulation of oxygen through the blood. This type of exercise makes the heart work more effectively and improves its ability to move oxygen-carrying blood with every beat. Speed walking, jogging, stair climbing, cycling and swimming are all examples of aerobic exercise.
“However, more studies are needed to determine the best physical activity, food and other lifestyle changes to reduce heart disease risk,” Dr. Tiffany Wiley added.
1. What would a “beer belly” cause?| A．Enlarged organs inside the body. | B．Higher risk of heart disease. |
| C．Raised mental pressure. | D．Inflamed stomach. |
| A．A white man with a waist size of 120 cm. |
| B．A white woman with a waist size of 90 cm. |
| C．An Asian man with a waist size of 102 cm. |
| D．An Asian woman with a waist size of 75 cm. |
| A．Beneficial. | B．Difficult. | C．Enthusiastic. | D．Useless. |
| A．Doing aerobic exercise can remove visceral fat completely. |
| B．Heart ability improves when one does speed walking. |
| C．Further studies are needed to reduce heart disease risk. |
| D．Food and life style determine one’s body shape. |
9 . Fast walkers may live longer than dawdlers (缓慢的人)— regardless of their weight, a new study suggests.
Researchers at Leicester University analyzed data on 474, 919 people with an average age of 52 in the UK Biobank between 2006 and 2016. They found women who walked briskly had a life expectancy of 86.7 to 87.8 years old, and men who kept up the pace had a life expectancy of 85.2 to 86.8. Slow walkers hadn’t much encouraging prospects (前景): women had a life expectancy of 72.4, and men of 64.8 years old, if they were more leisurely in their movements. According to the paper, published last week, that ratio held true even if the fast walkers were severely overweight. It does not necessarily mean fast walkers will live longer. Experts say it suggests walking speed could be a simple way for doctors to judge their patients’ general health alongside other tests.
It is hardly the first study holding up walking speed as a powerful evidence that appears to improve and determine our health.
In 2011, the Journal of the American Medical Association (JAMA) published a study by Stephanie Studenski, who found the same: walking speed was a reliable predictor of life expectancy.
In 2013, US researchers found walking pace was linked to lower heart disease risk and longer life expectancy. In 2018, a study from the University of Sydney found picking up your walking pace to even an “average speed” could cut your risk of premature death by a fifth.
And Tom Yates, the physical activity professor at Leicester who's behind the latest study, has been publishing findings on this connection for years.
In 2017, he analyzed the same UK Biobank data and found walking speed appeared to affect the risk of dying from heart disease — concluding that the slowest walkers were twice as likely to suffer a heart-related death compared to quick walkers.
1. What does the underlined word “briskly” in paragraph 2 probably mean?| A．Casually. | B．Quickly. | C．Actively. | D．Energetically. |
| A．Most fast walkers are overweight. |
| B．Fast walkers have a simple way of living. |
| C．Walking speed can help doctors know about their patients’ general health. |
| D．Doctors will surely have better ways to cure their patients of their illness. |
| A．Walking slowly is bad for people's health. |
| B．Walking speed can predict a person’s life expectancy. |
| C．People won't die early by increasing their walking pace. |
| D．Lower heart disease risk is determined partly by walking pace. |
| A．Fast Walkers May Have a Long Life Expectancy |
| B．Life Expectancy Is Determined by Exercise |
| C．Researchers Try to Improve Life Expectancy |
| D．The Public Doubt Researches on Walking Speed |
10 . The Best National Parks to Visit in Winter
While most parks tend to draw families in the summer and fall, there are also ideal spots for adventurous winter trips.
Yellowstone National Park, Wyoming
The country’s oldest and best-known national park takes on an almost otherworldly atmosphere in winter: the air filled with rolling steam, the strong colors of hot springs, the surrounding white landscapes, let alone the impressive wildlife during this time, like bison, wolves, and playful red foxes. Just book a guided hiking tour to get a ranger’s perspective on the park and local people.
Joshua Tree National Park, California
With its giant red rocks and unique trees, you’ll feel like stepping onto a foreign planet as you spend hours hiking the Panorama Loop or Maze Loop. The park is recognized as an International Dark Sky Park, featuring virtually zero light pollution and the country’s best views of a starry sky.
Grand Canyon National Park, Arizona
A significantly lower number of visitors in winter means you can take in unblocked views of the South Rim, and get to see the rare beauty of the Grand Canyon dusted with snow. For those adventurous and daring, it is recommended to hike the Bright Angel Trail and take the chance to see the canyon’s wintertime wildlife, including mule deer, elk, and bald eagles.
Virgin Islands National Park, St. John
Surprise! Not all wintertime national park trips need to involve snow. Virgin Islands National Park is most famous for its white-sand beaches. You can also hike inland to visit old sugar plantations, or venture out to the water to swim along with sea turtles and manta rays. You will definitely enjoy a different winter here.
1. Which park will one choose if he/she is interested in stars?| A．Yellowstone National Park. | B．Joshua Tree National Park. |
| C．Grand Canyon National Park. | D．Virgin Islands National Park. |
| A．We can have a poor view of the South Rim there. | B．It lies in an area with rolling steam and hot springs. |
| C．There is a slight decline in visitor numbers in winter. | D．The Bright Angel Trail is challenging in cold weather. |
| A．Hiking. | B．Skiing. | C．Swimming. | D．Hunting. |
