Everyone knows that walking is one of the best means of exercise for health, so physicians often recommend 150 minutes a week. But that’s a measure of volume (量). What about the walking speed? Does that make a difference? A recent paper indicates the answer may be yes.
Previous research had only focused on total amounts of exercise in minutes or steps. A team of experts in Sydney looked at whether people who walked similar distances but at different speeds gained more or less health benefits
The researchers studied 11 English and Scottish population-wide reports that included more than 50,000 regular walkers with an average age of late 40s. The walkers were grouped according to four walking speeds: slow, average, brisk(轻快的) and fast. Lastly, the researchers figured out the death( from heart disease and cancer) rate during an average follow-up period of 9.2years.
New researchers showed marathoners had less arthritis(关节炎) than non-runners.
Participants who walked at an “average” speed, as opposed to ” slow ” , had a 20 percent lower risk of death. Those walking at a “ brisk ” or “ fast ” pace enjoyed an additional 4 percent lower death rate. While the best speeds vary with one’s own age and fitness, a pace below 20 minutes per mile is considered average, and below 18 minutes per mile is considered brisk. All the benefits came from lower heart-related deaths. Walking pace had no effect on cancer rates.
“Our paper is the first paper to keep apart walking pace from the physical activity volume ,”
Explained Emmanuel Stamatakis , a professor of the Charles Perkins Center. “We also took steps to role out ( 排除 ) the possibility that the slow walkers were in poor health to begin with.”
“Walking more is better than walking less. But don’t fall into the trap of thinking that any walk improve health. Keep out of the ‘ slow ’ zone. Make sure you’re putting some effort into your walk”, Stamatakis noted. “ An appropriate effort for those in a comfortable walking routine might be slightly out of breath.”
When you’re short of time, simply walk faster to increase the pay-off. “ A faster pace means you are challenging yourself to make adaptations for better health and fitness,” said Stamatakis.
1. What’s the finding of the recent paper?A.Slow walkers are in poor health at first. |
B.Walking speed influences one’s health. |
C.Walking pace has some effect on cancer rates. |
D.Walking 150 minutes a week is good for health. |
A.They were divided into groups by walking pace. |
B.They were put into different age group. |
C.They were groups by health condition. |
D.They were organized by nationality. |
A.Participants are from eleven countries. |
B.Participants include people of all ages. |
C.It collected data during an average of 9.2 years. |
D.It focused on total amounts of exercise in minutes. |
A.Working more. | B.Walking a little faster. |
C.Trying other exercise. | D.Changing the present lifestyle. |
相似题推荐
【推荐1】Natural Therapy(疗法)
The great outdoors: it's the place to head for when you're in need of peace and quiet, open spaces, beautiful scenery and exercise. Whether a huge mountain range or a local country park, these natural areas are perfect for us to refresh us when we live a stressful life.
As an example, in the foothills of the Snowdonia National Park in the UK, specialist therapy sessions are held to help people who suffer from depression, anxiety and stress.
It's true that for most of us connecting with the natural world definitely lifts our spirits. But the mental health charity Mind says eco-therapy has been recognized as a formal type of treatment that can sometimes be prescribed to someone by a doctor. It doesn't involve taking medication.
Evidence has shown there are many benefits of this "green" therapy.
A.Of course, eco-therapy won't cure everything. |
B.Here the patients go outdoors to deal with stress. |
C.Outdoor art-related activities are held for participants. |
D.Instead, it just develops a person's relationship with nature. |
E.These include improving social contact, social and work skill. |
F.In nature you can do many things, including reading papers and watching TV. |
G.Their relieving power is being used more and more to treat mental health problems. |
【推荐2】If there had to be a father of handwashing in history, it would be Ignaz Semmelweis. While working at Vienna General hospital, the Hungarian doctor, faced with a situation in which maternal death (孕产妇死亡) in hospitals were significantly higher than local clinics, tried hard clues as to why.
Germs (细菌) were yet to be discovered, and it was still believed in the 1840s that disease was spread by bad smells in the air. So it didn’t seem a problem that trainee doctors hanging out of labs to dissect (解剖) human bodies would pop up to the maternity ward (产房) to deliver a baby without washing their hands.
Then an accidental finger cut by a knife during a dissection caused a doctor to die, seemingly of the same sign the mothers had been getting. Semmelweis assumed that something from the dead bodies was to blame, which might, through the hands of doctors, make their way into women’ s bodies during childbirth.
To test his theory, he ordered doctors to wash their hands and instruments in some chlorine solution. As a result, the death rate for new mothers dropped to about 1 percent, compared with that of as high as 18 percent before the experiment.
However, he faced great resistance, and met a sad end. People at that time didn’t think of themselves as sort of walking Petri dishes. And the majority of doctors then were from middle- or upper-class families, and thought of themselves as very clean people.
Over the next 40 years, a better understanding of germs developed, and attitudes to hygiene (卫生) gradually shifted. In 1876, the German scientist Robert Koch discovered the anthrax bacillus (炭疽), kicking off the new research field of medical bacteriology. Many more germs were later identified. Surgeons started to take handwashing seriously.
By the 1890s and into the early 1900s, handwashing moved from being something doctors did to something everybody had been told to do.
1. What was the situation like in the 1840s?A.Germs might have been discovered then. |
B.Women suffered from delivering babies then. |
C.The air at that time was dirty and full of viruses. |
D.People were unaware of how disease was spread. |
A.Liquid. | B.Option. | C.Tissue. | D.Shell. |
A.It was effective. | B.It was necessary. |
C.It was ridiculous. | D.It was dangerous. |
A.Steps to Protect Yourself |
B.Disease Spreading by Your Hand |
C.Hand Washing Critical in Fighting Viruses |
D.The First Recorded Discovery of Handwashing |
【推荐3】Awake? Here Is How to Return to Sleep
It is usual for people to wake up a few times during the night. Older people often get up to go to the bathroom. Waking at night usually is not a problem.
But what about some other people? If it happens a few times a week, there may be a troublesome reason.
You may wake up, look at the clock and worry about your work. There may be stressful things on your mind. These feelings may activate (激活) a stress hormone in your body. If you worry that you can’t sleep, it may make it harder to fall asleep.
Try to keep to a routine schedule for sleep. There is a problem when you go to bed and wake up at different times. Studies have shown that irregular bedtimes may lead to insomnia.
If you get up during the night to go to the bathroom, limit how much water or liquid you drink a few hours before bedtime.
A.Do something helpful |
B.Try to avoid early naps |
C.Avoid coffee after 2 pm |
D.Nap no later than early afternoon |
E.The problem has to do with the sleep cycle of your body |
F.Here are some reasons for the difficulties in your sleeping |
G.Stress and anxiety are some reasons for people who have sleep difficulties |
【推荐1】Why You Should Always Store Apples in the Fridge
To fridge or not to fridge? Have you discovered what foods you should take out of your refrigerator and what unexpected items you should store there?
Apples require a little bit of coolness in order to stay fresh in storage for a longer period of time. Cool temperatures alone are often enough to keep your apples fresh for weeks. Keeping apples in a basket in your kitchen is a good visual reminder to get your doctor-recommended one a day. As it turns out, though, storing apples on your countertop could cause them to go bad weeks sooner than if you put them in the fridge.
If you’re not planning on eating all your apples within a few weeks, you might want to consider the variety you buy.
A.How cold? |
B.How to store apples? |
C.Let’s take apples for example first. |
D.Once apples are ripe, they easily go bad. |
E.So what’s the best place to store your apples? |
F.Usually, at room temperature, apples last about a week. |
G.The smaller the apple, and the thicker the skin, generally the longer it will store. |
【推荐2】By the end of the century, if not sooner, the world’s oceans will be bluer and greener thanks to a warming climate, according to a new study.
At the heart of the phenomenon lie tiny marine microorganisms (海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean’s appearance.
Phytoplankton live at the ocean surface, where they pull carbon dioxide (二氧化碳) into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean’s warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients.
Stephanie Dutkiewicz, a scientist in MIT’s Centre for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener. “Not only are the quantities of phytoplankton in the ocean changing,” she said, “but the type of phytoplankton is changing.”
And why does that matter? Phytoplankton are the base of the food web. If certain kinds begin to disappear from the ocean, Dutkiewicz said, “it will change the type of fish that will be able to survive.” Those kinds of changes could affect the food chain.
Whatever colour changes the ocean experiences in the coming decades will probably be too gradual and unnoticeable, but they could mean significant changes. “It’ll be a while before we can statistically show that the changes are happening because of climate change,” Dutkiewicz said, “but the change in the colour of the ocean will be one of the early warning signals that we really have changed our planet.”
1. What are the first two paragraphs mainly about?A.The various patterns at the ocean surface. |
B.The cause of the changes in ocean colour. |
C.The way light reflects off marine organisms. |
D.The efforts to fuel the growth of phytoplankton. |
A.Sensitive. | B.Beneficial. |
C.Significant. | D.Unnoticeable. |
A.Phytoplankton play a declining role in the marine ecosystem. |
B.Dutkiewicz’s model aims to project phytoplankton changes. |
C.Phytoplankton have been used to control global climate. |
D.Oceans with more phytoplankton may appear greener. |
【推荐3】The musician Moby once said, “Music has no form whatsoever--all it is is air moving just a little bit differently. It’s the only artform that you can’t touch.” It is true that we cannot touch music, but that does not mean that music is invisible. There is, in fact, away to “see” music.
How can we see music? Neuroscientists (神经科学家) use MRI machines to look inside the brain. These tools let them see the neurons, or braincells, which are in use when people are listening to music. Computer screens linked to MRIs show that when people listen to music, neurons light up in many parts of the brain.
Neuroscientists have ds covered that it isn’t necessary to hear music for the neurons to light up. Even when you just think about a song, these neurons light up. In addition, the same neural activity in the same part of the brain happens when people experience other pleasurable activities. For example, some of the same neurons light up when we eat something delicious or hug a love done. Negative feelings such as fear or anxiety make neurons in a different area light up. However, when an anxious or frightened person listens to pleasurable music, these neurons stop lighting up.
Why does music have so many benefits? The answer maybe because it uses so many different parts of the brain. According to neuroscientists, using many parts of the brain at one time gives your brain a good “workout.” Reading music while playing a musical instrument uses more parts of the brain simultaneously (同时地) than most other activities. It involves both physical movement and mental activity, much like playing a sport such as soccer.
So, although Moby is completely correct that we cannot touch music, it is possible to “see” music. There is still a lot to learn about the effects of music on our brain. However, there is no doubt that scientists have shown that music is an extremely powerful artform with many positive effects.
1. Why does the author mention Moby’s word?A.To define what music is. |
B.To call people’s attention to music. |
C.To introduce the study of seeing music. |
D.To confirm the invisible feature of music. |
A.When you are worried about your exam. |
B.When you are busy with your presentation. |
C.When you enjoy your favorite brand of coffee. |
D.When you miss the deadline of your homework. |
A.The advantages of music over sports. |
B.The reasons for the benefits of music. |
C.The causes of the neurons lighting up. |
D.The various healing functions of music. |
A.Positive. | B.Critical. | C.Neutral. | D.Dismissive. |
【推荐1】In today’s digital age when you can get information in a blink of an eye, there is a concern about children developing an appreciation for reading printed books.That’s why communities in Australia have come up with a way to spread a love of books in the younger generations.
Communities have handled this issue by bringing libraries to where the kids are—in the streets.The little libraries consist of weatherproof boxes that are set up outside houses or public spaces and are filled with books.People can take books they haven’t read and donate ones they have to the libraries.
Street Library Australia, a nonprofit, was started by Nick Lowe after he saw a Little Free Library on a trip to the US. After an initial workshop in 2015 to build 30 libraries, the idea mushroomed and now there are 4 ,500 registered street libraries in Australia. “It just grew and grew ,” Lowe said.
The libraries come in all shapes and sizes from innovated doll houses to old kitchen cupboards. They are completely voluntary and anyone can start one. Pamela Zielke who runs a library called Pam’s Pantry gives out toys and craft (工艺) supplies along with books. As an early childhood educator, she started her library with the goal of rescuing books from the dump.
But the libraries are doing much more than just providing books and other donated items to people. The street libraries are also building a community. “It’s a little stopping place outside your house,” Lowe said. “It’s a great way to meet people in your neighborhood who are also book lovers, recycle books and find new books.” But even more importantly, with a shared interest, the libraries are bringing communities closer together.
1. How do communities in Australia develop children’s love for books?A.By borrowing good books from the libraries. | B.By providing hook appreciation classes. |
C.By exchanging books with one another. | D.By building libraries close to their homes. |
A.Got acceptable. | B.Grew fast. | C.Existed currently. | D.Changed slowly. |
A.They are set up by individuals. | B.They have the same size and shape. |
C.They bring owners many profits. | D.They sell recycled toys and books. |
A.They connect communities together. | B.They improve education of residents. |
C.They save money on buying books. | D.They promote economic development.c |
【推荐2】Many of us have heard of the saying: everything is possible if you can just believe. But few of us really know the power of faith and perseverance. South African swimmer Natalie du Toit embodies those virtues.
Du Toit, became the first swimmer to compete in both the Olympic Games and the Paralympics(残奥会)in Beijing. Although she finished 16th in the tough 10 km marathon in the able-bodied Games. she has collected three golds in the Paralympics so far.
One of the most successful disabled athletes of all time, Natalie du Toit was already a promising swimmer when she lost her leg in a motorcycle accident in 2001, at just 17.
“There are a lot of dark moments,” du Toit said. “There are some days when I cry. But I try to remember that better days are ahead. You just go on.”
Within a few months, she was back in the swimming pool.
She still competes and still succeeds. The only difference is that she has switched to longer events--from 200 m and 400 m individual medley to 800 m and 1,500 m freestyle--to make up for her loss of speed with only one leg. But she made no adjustment to her mental outlook(精神面貌).
“Going out in the water, it feels as if there's nothing wrong with me. It doesn’t matter if you look different. you're still the same as everybody else because you have the same dream.”
She is the owner of many world records, and she also won gold when competing against able-bodied swimmers in the 1, 500 m freestyle at the All Africa Games in 2007.
But there is no magic recipe for success. It all comes down to hard work and determination. “She is stubborn, which is good and bad, ” said her coach Karoly Von Toros. “Good for the swimming, but bad for the coach.”
There is a poem that hangs on her wall that reads:
The tragedy of life does not lie in not reaching your goals;
The tragedy of life lies in not having goals to reach for.
1. Natalie du Toit is a vivid example that .A.you are what you believe |
B.your biggest enemy is yourself |
C.results are not so Important as the process |
D.you must set reasonable goals or you will fail |
A.makes | B.creates |
C.represents | D.introduces |
A.the first athlete to compete with able-bodied swimmers in the world |
B.the youngest disabled swimmer to break the worl record in the 1, 500 m freestyle |
C.the youngest disabled swimmer to collect three golds in a single Paralympics |
D.the first swimmer to compete in both the Olympic Games and the Paralympics |
a.She won gold at the All Africa Games
b. She finished 16th in the tough 10 km marathon in the Olympics
c. She adjusted herself to long events
d.A motorcycle accident disabled her.
A.cdab | B.dcba |
C.dcab | D.dacb |
【推荐3】School closures due to the corona-virus mean that children across the United States have to go without formed lessons. But many are missing more than that; they’re lacking meals that were formerly provided for them by schools. Two-thirds of the 31 million American kids who regularly eat school lunches depend heavily on those meals to nourish (滋养) their bodies.
Some programs do exist for feeding children when schools are unable, such as the Summer Food Service Program and the Seamless Summer Option, which can serve as a model for times like these. Such programs use other locations as meal service sites, such as libraries and community corners, but the issue is the closure of many of these public sites which is happening at a rapid rate.
Then there is the additional difficulty of feeding groups of people at a time when groups of people are not supposed to gather, which is not safe during a viral outbreak and the Centers for Disease Control and Prevention (CDC) have stated that administrators should ‘‘design new strategies (策略) to avoid providing meals in settings where people might gather in a group or crowd... such as ‘grab-and-go’ bagged lunches or meal delivery”.
These are strange and threatening times, with the corona-virus situation worse by the day. Low-income families suffer the most in times like these. They have less cash on hand to buy supplies; they may not have a vehicle in which to transport large quantities of food; their jobs tend to be more uncertain. It’s important to remember this and to continue donating, supporting, and showing mercy to less fortunate individuals in limes of difficulty. It shouldn’t be left entirely to school administrators to figure out how to feed hungry children, every community has a duty to ensure this happens
1. What issue does the passage chiefly focus on?A.Making up for missing lessons. | B.Providing meals for needy kids. |
C.The great needs of poor families. | D.The strict measures for virus prevention. |
A.What food to supply. | B.When to close the public sites. |
C.How to get the permit. | D.Where to give out the food. |
A.To avoid crowd gatherings. | B.To save people’s time. |
C.To give away more food. | D.To change people’s mind. |
A.Show the seriousness of the problem. | B.Improve the general situations. |
C.Call for more help or donations. | D.Advertise their programs. |
【推荐1】We lead very busy lives and we too easily forget how hard it was for us to focus on homework when we were in school. Now that we have jobs to do, food to buy and cook and other errands (差事) to run, even I sometimes think it would be a welcome change to have to sit down and quietly read and write with no distractions. But, in case you don’t remember — homework is pretty much every child’s least favorite thing to do. In the age of Netflix, Snapchat and wifi, the distractions are almost endless. It can sometimes almost be too hard to even keep up with all the new tech advances our kids are using, so how can we make sure that those advances take a back seat to our children’s education? Here are some ideas.
There’s no point in stopping the reality that young people are going to focus on their phones and tablets instead of other things at times. Your best way is to accept, actually the tech sector continues to be the most profitable and fast-growing industries and that’s unlikely to change fast. There are ways to use technology to help your kid do homework. Ask your teacher and school staff what apps and websites they’re using to teach lessons and supplements (补充) them with at-home activities as well.
Even though technology has changed, the basics haven’t. If you want to read, write and think properly, you need to have peace and quiet and the ability to focus, right? Well, your kids are just the same. Try and find a space in your home to enable your kids to do work away from televisions, the Internet or other distractions. Let me be clear: this shouldn’t be a prison. I feel like I’m my most productive working alone in an office or at a busy cafe with my headphones on. Getting lost in other realities helps my creativity flow. Placing kids in isolation can often have a harmful effect and doesn’t always equal being more productive.
I feel like “getting engaged” is always a big part of my advice for parents on just about everything. How can you make sure your children are being successful if you have no idea what they’re doing? How can you be sure they’re doing it right if you don’t know what is the correct answer? What do they need? You should be in touch with their teachers, have a sense of where the lessons are going, what kinds of assignments are being given and what success looks like in the classroom. Knowing all of that is key to your child’s success, especially when matched with some encouraging praise and helpful tips on how he can keep going. Thinking about how your child is best motivated by other things and using those methods here reasonably isn’t a bad idea.
And if by chance you’re having trouble solving that algebra equation (代数方程) or diagramming a sentence, don’t fear, you’re not alone. Use the school staff, other parents or friends as your support. Better to seek help than do noting.
We all know that homework isn’t exactly the most entertaining way anyone spends their time. And sometimes we can’t help but feel that since we left school, we’re done with homework forever. But the circle of life plays out in all times and it’s up to us to make sure that we pass on the lessons we’ve picked up and that while homework might seem dull, it’s how we build skills, learn real lessons and get on the road to greatness. That greatness is on the inside, it’s up to us as adults to enable the young people to bring it out. A key ingredient to achieving greatness is to take a lifelong learning.
1. What does the author think about children’s homework?A.It affects parents’ everyday life. |
B.New tech leads to their distraction. |
C.Too much homework is bad for children. |
D.It’s easy to do it with the help of new tech. |
A.Don’t fight the tech devices. |
B.Better do homework at school. |
C.Don’t be distracted by new tech. |
D.Stick to the basis of homework. |
A.it’s better to have it at a quiet place |
B.it’s better in an office or at a busy cafe |
C.you needn’t put your child in a small room |
D.you have to let your child do it beside you |
A.you must be better at all the lessons |
B.you needn’t know all about the homework |
C.don’t make your child feel too comfortable |
D.having a reward structure might not hurt as well |
A.Children should gain greatness on their own. |
B.Parents can’t replace their children in homework. |
C.Children’s success can’t do without parents’ efforts. |
D.Parents can only obtain skills by helping their children. |
A.Successful roads to the greatness of life |
B.Doing homework with new technology |
C.How to turn homework into a great pleasure |
D.How to make homework as a success for you child |
【推荐2】When people see machines that respond like humans, or computers that perform amazing functions, they sometimes joke about a future in which humanity will need to accept robot overlords(霸主).But buried in the joke is a seed of unease. Science-fiction writing and popular movies have shown us about artificial intelligence (AI) that escapes its creators’ control.
Even in the real world, not everyone is ready to welcome AI with open arms. In recent years, as computer scientists have pushed the boundaries(界限) of what AI can accomplish, leading figures in technology and science have warned people about the frightening dangers that artificial intelligence may pose to human beings, even suggesting that AI could destroy the human race. But why are people so frightened about the idea of AI?
Elon Musk is one of the voices that have raised red flags about AI. In July 2017,Musk told people at a meeting of the National Governors Association, “I have exposure to the very cutting-edge AI, and I think people should be really concerned about it .I keep sounding the alarm bell. But until people see robots going down the street killing people, hey don’t know how to react, because it seems so impossible.”
Earlier, n 2014,Musk had labeled AI “our biggest existential threat”, nd in August 2017,he declared that humanity faced a greater risk from AI than the terrorists.
Physicist Stephen Hawking, who died on March 14,2018 also expressed concerns about AI, telling the BBC in 2014 that “the development of full artificial intelligence could spell the end of the human race”.
It’s also less than reassuring that some programmers — particularly those with MIT Media Lab in Cambridge, Massachusetts — seem determined to prove that AI can be terrifying.
1. What are top scientists in AI worried about?A.It has wonderful functions. |
B.It contributes too much to movies. |
C.It may end the human race some day. |
D.It has an ability to understand our jokes. |
A.Disapproving. | B.Ambiguous. |
C.Understanding. | D.Supportive. |
A.Questions. | B.Warnings. |
C.Complaints. | D.Wonders. |
A.Be a great threat to human beings. |
B.Learn the human emotions like fear. |
C.Predict the future of the human race. |
D.Turn horrible tales into scary stories. |
The Olive Garden
The Olive Garden is a family favorite, especially because of the kids menu, crayons, and activity books. My daughter believes this famous Italian food chain has the “best pizza ever” on its kids menu. The kids also get to indulge in the famous Olive Garden bread --- a favorite for kids of all ages.
The Silver Diner
The Silver Diner, which has locations in New Jersey, Maryland and Virginia, gets a nod for featuring one of the most fun kids meal containers --- a heavy-duty paper car --- as well as old-fashioned, table-side jukebox selectors (点唱机选择器).The menu wins too, both for its breadth (范围) of choices, and for the number of them that are healthy.
Legal Sea Foods
The kids menu for popular seafood chain Legal Sea Foods is extensive (详尽的) and features the most choices from the sea of any kids menu we’ve seen. The original Boston Harborside restaurant has a small children’s menu, but its other locations all have 12 kid’s choices, including a pricy (昂贵的) One Pound Lobster (or 1/2 pound), Wood-Grilled Fish of the Day, and Popcorn Shrimp selections.
Ground Round
This restaurant chain was a favorite of children growing up in the 1970s and early 1980s, as it served popcorn and peanuts before the meal instead of bread, and let kids throw the peanut shells on the floor. There were also cartoons and silent movies shown during dinner. Ground Round has changed with the times, but they still have delectable (美味的) offerings for kids.
1. What makes the Silver Diner different from the other restaurants for kids ?
A.Its great pizza and variety of activity books. |
B.Its fun kids meal containers and jukebox selectors. |
C.The popcorn and peanuts served before the meal. |
D.The way its menus change with the times. |
A.The Olive Garden. | B.The Silver Diner. |
C.Legal Sea Foods. | D.Ground Round. |
A.School teachers. | B.Parents with kids. |
C.Travelers to the US. | D.Restaurant managers. |
A.be crazy about | B.be tired of |
C.be good for | D.be surprised at |