The weather is getting hotter. You are thirsty playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you are drinking. Something that looks cool may not be good for your health.
There are plenty of "energy drinks" on the market. Most of them have beautiful colors and cool names. The lists on them tell you they are helpful to your health. Sounds great!
But after a careful check you may find that most energy drinks have lots of caffeine (咖啡因) in them. These drinks are especially aimed at young people, students, busy people and sports players. Makers sometimes say their drinks make you better at sports and can keep you awake. But be careful not to drink too much.
Caffeine makes your heart beat fast. Because of this, the International Olympic Committee has limited( 限制) its use. Caffeine in most energy drinks is at least as strong as that in a cup of coffee or tea. Possible health dangers have something to do with energy drinks. Just one box of energy drink can make you nervous, have difficulty sleeping and can even cause heart problems. Scientists say that teenagers should be discouraged from taking drinks with a lot of caffeine in them.
1. Many people like drinking energy drinks because of the following EXCEPT that ________.| A．they have beautiful colors and cool names |
| B．they have lots of caffeine |
| C．they can keep them awake and better at sports |
| D．they are said to be helpful to health |
| A．heart problems | B．nervousness |
| C．sleeping difficulty | D．possible health dangers |
| A．encouraged | B．stopped |
| C．helped | D．disliked |
| A．advertisements are important in getting people to buy energy drinks |
| B．energy drinks are helpful to teenagers' study |
| C．sports players need to drink a lot of energy drinks |
| D．energy drinks are especially aimed at teenagers |
| A．What's the Use of Energy Drinks? | B．Who Can Drink Energy Drinks? |
| C．What's That in Energy Drinks? | D．Why Can't We Buy Energy Drinks? |
相似题推荐
【推荐1】Okay to Eat?
At least 50% of U. S. adults have eaten food off the floor. That’s according to a 2017 Harris Poll. Many people use the five-second rule. The rule says that fallen food is safe to eat if it has been on the floor for less than five seconds. Can people really use the five-second rule to save a dropped sandwich? Or should they throw it and make a fresh one?
Donald Schaffner is a professor of food science. His study shows that the five-second rule should not always be used. In his 2016 report, he says it’s not wise to eat dropped wet food. The wet food takes in bacteria(细菌) as soon as it falls. “Bacteria don’t have legs, they move with the moisture,” Schaffner says. The wetter the food is, the more bacteria it soaks up(吸收).
Anthony Hilton studied the five-second rule too. He is a professor of Life and Health Sciences. Hilton found that a dry food on the floor collects fewer bacteria than a wet food. Hilton also found that carpeted floors pass fewer bacteria than wood floors. Still, one should be careful. “Food that is on the floor is never completely risk-free to eat,” he says. “But if you drop a dry food in your house, it’s usually okay if you pick it up very quickly. Most clean homes don’t have bad bacteria.”
Should you eat food that was dropped on the kitchen counter? Dr. Steven Dowshen is a doctor for children. He says that floors are not the only place that can make food unsafe to eat. “Kitchen counters can contain more harmful bacteria,” Dowshen told TFK. This is because raw foods sometimes have bad bacteria called salmonella. These raw foods can be on kitchen counters. “If people eat food off a surface that has salmonella, they can get very sick,” says Dowshen.
With the five-second rule, the type of food and the place where it falls matter. So perhaps use this instead: When in doubt, throw it out.
1. What’s Donald Schaffner’s opinion about the five-second rule?| A．The five-second rule should always be used. |
| B．The drier the food is, the more bacteria it takes in. |
| C．It’s a good choice to eat the dropped wet food. |
| D．The minute the wet food falls, it soaks up bacteria. |
| A．delicious | B．dangerous | C．safe | D．easy |
| A．People should not eat a dropped sandwich on any places. |
| B．People cannot eat food that is on the floor because of salmonella. |
| C．People need to consider the type of the dropped food before eating. |
| D．People should be careful about the food dropped on the kitchen counter. |
| A．To introduce the five-second rule to people. |
| B．To encourage people to use the five-second rule. |
| C．To show different people’s opinions about the five-second rule. |
| D．To advise people to think twice before using the five-second rule. |
【推荐2】Do you know the benefits (益处) of potatoes? It is nearly the king of all the vegetables and all the food.
As we know potatoes were first grown (种植) in Africa. Africa is the hometown of potatoes. Later potatoes were grown all over the world. First people only ate (吃) them uncooked. As the time passed, people learned to cook them delicious.
Now potatoes have become delicious food or cooked vegetables at table. Men and women, young and old enjoy eating them very much. It is said potatoes can be cooked into 400 kinds of cooked vegetables.
In the past some people thought (认为) they could make people fat and they were afraid of (害怕) eating them too often. But in fact, they do not make people fat but keep people thin. So you can enjoy them if you like.
1. ________ is the hometown of potatoes.| A．Asia (亚洲) | B．Europe (欧洲) | C．America | D．Africa |
| A．400 | B．300 | C．200 | D．100 |
| A．Potatoes were first grown in Asia. | B．Potatoes can make people fat. |
| C．Potatoes can make people sad. | D．First people ate potatoes uncooked. |
【推荐3】Most of the delicious fruits we eat today might not look or taste like their wild ancestors (祖先) at all. They are popular after going through many rounds of development over a long period of time in different parts of the world.
Tomatoes were first grown in the western parts of South America. Though the Spanish and Italians began eating tomatoes in the 18th century, the British and Americans continue to avoid them because people believed that tomatoes are poisonous. After that, it took until the 19th century for Americans to begin using it in cooking. Tomatoes were only used as decorative plants in gardens in China until the early 1900s. Since then it has quickly become a popular kitchen main stay in China.
Peaches are a very old plant. Surprisingly they have the same outer skin as fossils (化石) from over 2.5 million years ago. Ancient peach stones discovered in China prove that peaches were in China at least 7000 years ago. People have worked for centuries to create the modern peach. Peaches became what we eat today as a result of efforts to change the fruit into a larger and sweeter fruit with a much smaller stone.
Watermelon is one of the most common fruits during the hot summer. The pink juicy and delicious part covered by a hard skin is also the result of centuries of continuous development. In the 7th century Indians had already begun to plant watermelons which made their way to China in the 10th century. Watermelons reproduced quickly because they had a large number of seeds (种子). They were, however, smaller and less sweet than moden melons. Fruits with fewer seeds and more juice were developed in the 17th century as a result of European farmers experiments. That is how we ended up with the delicious watermelon today.
根据材料内容选择最佳答案。1. Why is the first paragraph written?
| A．To lead in the topic. | B．To present the numbers. |
| C．To shock the readers | D．To show the latest results. |
| A．有益的 | B．有毒的 | C．健康的 | D．美味的 |
| A．Da Vinci (1452-1519) the Italian painter could eat tomatoes |
| B．Newton (1641-1727) the English physicist could enioy tomatoes. |
| C．Zheng He (1371-1433) the Ming explorer could eat peaches. |
| D．LiBai (701-762) theromantic poet might enjoy watermelons |
A． | B． | C． | D． |
| A．The delicious fruits. | B．The wild plants |
| C．The development of tomatoes. | D．From wild plants to pleasing fruits |
I was amazed as the climber managed to describe every inch of the six-day climb he’d finished a year before. I couldn’t believe what an amazing memory he had. Later, I learned that I could remember every inch of my scariest climbs, too. That’s because emotion has a very strong effect on memory.
What is memory? Memory is connecting experiences together so that they can be recalled at a later time. In our brains, neurons play an important role in forming memories.
Memory is the process of connecting certain neurons together to make a connection. We have long-term and short-term memories. ____________ Just imagine how cluttered your mind would become if you remembered every single thing. Most of the stuff that’s stored is useless information.
Short-term memories are formed by connecting two neurons for a while, through chemical changes in the points between neurons, called synapses. The connections soon disappear, because the chemical reactions slowly die out. Long-term memories need turning on genes in the nucleus of the neuron to make new proteins. These new proteins strengthen the connection between the two neurons through the process of cell growth, making the neurons better connected.
To move a memory from short-term to long-term storage usually takes much repetition and practice. In an experiment,animals could complete an action after they were trained for many times. Afterward, they were given medicine that stopped their genes making new proteins. By the next morning, they'd forgotten how to complete the action.
However, events that have a powerful emotional influence don’t need repetitions to be remembered for a lifetime. When an event causes a strong feeling, your brain will find that no matter what happens, it must be particularly important and worth remembering. If you have ever had a near-death experience, you will never forget it. This is because hormones that are produced in near-death situations send signals to neurons to move whatever short-term memories they are holding into long-term memory. This strong emotion is why a climber can remember the process of a climb in detail.
1. How did the writer start the passage?| A．By giving advice. |
| B．By asking questions. |
| C．By giving examples. |
| D．By listing numbers. |
| A．What can be stored in our brains? |
| B．When do we form short-term memories? |
| C．Where can we store our memories? |
| D．Why do we have two types of memories? |
| A．it usually takes less time to form short-term memories |
| B．short-term memories just last for a short period of time |
| C．making new proteins is the key to forming long-term memories |
| D．the medicine that the animals took helped them form memories |
| A．Being happy can’t help us remember things better. |
| B．Being scared helps people form long-term memories. |
| C．Repeating something is the only way to remember it. |
| D．A powerful emotion is necessary in forming memories. |
【推荐2】Recently, the Ministry of Education has issued (发布) five documents on strengthening (加强) the management for primary and middle school students, among which sleep management is required. It’s time to change our way of life and study.
You may think the best way to solve a difficult problem is to keep working on it, even overnight. But the truth is just the opposite: Your best chance to solve a problem is actually to sleep on it.
A team of researchers at Northwestern University, US, found that sleeping is useful in both making memory stronger and re-organizing it. This can help you solve problems.
The researchers did an experiment (实验) with 57 students. They asked them to solve 42 difficult problems on the first day. The students worked on each problem while listening to different music. The research encouraged students to remember the music they heard while solving the problems. In the end, there were six problems that the students still hadn’t solved.
The students then went back home to sleep. They were given special sleep-monitoring (睡眠监测) and music players. The players played music connected with the unsolved problems while the students were in the slow-wave sleep (慢波睡眠) stage. This stage is when people are likely to dream and reorganize their memories.
The next morning, the students tried the unsolved problems again. Researchers found they were 55 percent more likely to solve them. The music activated (激活) the memories they had of the problems while they were sleeping. It allowed them to “work” on the problems in their sleep.
Earlier studies of both people and animals have shown that sleep can not only make memory stronger, but also help us organize information in our brains. This study seems to support that understanding. So, the next time you face a difficult problem, sleep on it. Then play some music to remind yourself of the problem.
1. What did the researcher at Northwestern University find?| A．Sleeping can help people solve problems. |
| B．Listening to music can improve memory. |
| C．Music can help people solve problems faster. |
| D．People can solve difficult problems in their dreams. |
| A．the team | B．the university | C．sleeping | D．memory |
| A．This study supports earlier studies. |
| B．The research is of little practical value. |
| C．This study should have had animals included. |
| D．No research has been done in this field before. |
| A．①②③④-⑤⑥-⑦ | B．①②-③④⑤⑥-⑦ |
| C．①②-③-④⑤⑥⑦ | D．①②-③④⑤-⑥⑦ |
【推荐3】Artificial intelligence (人工智能), or AI in short, is the science of giving computers and machines ability to think and work like humans. AI scientists and engineers have made a lot of cool technologies.
AI is rapidly catching up with the human ability to read faces. As a result, facial recognition (识别) is used a lot in the world. Chinese police use this technology to identify criminals (罪犯). Once they caught a criminal when he attended a concert. It also checks the ID of ride-hailing (网约车) drivers and lets people pay for things with a smile.
AI is also used in self-driving cars, which are believed to be the future of driving. Most drivers may wave or nod at passers﹣by to let them cross the street, but self-driving cars don’t have this ability. Carmakers are testing a light signal system to help them “speak” to humans. The system can show what self-driving cars will do. For example, if a driverless car is yielding (让路), it will lash two white lights side to side. A rapidly flashing light tells passers-by that the car is about to speed up.
Service Robots also show you how powerful AI is. Imagine this—you come back home from school and your robot housekeeper is waiting for you at the door. After dinner he teaches you to play the piano, just like a real music teacher. Such thoughts will soon happen in the real world. In the future, more and more service robots will become good home helpers.
AI is so powerful that it can help human beings and even replace us in many jobs
1. What does the underlined word identify mean in the passage?| A．To let somebody know his mistakes. | B．To come to realize and tell who is who. |
| C．To take somebody to the police station. | D．To inform somebody of something important. |
| A．Driving cars. | B．Making people smile. |
| C．Calling the police. | D．Checking people’s information. |
| A．Service Robots at school. | B．Robots as ride-hailing drivers. |
| C．Facial recognition for payment. | D．Light signals for self-driving cars. |
| A．People use AI in many different ways. |
| B．AI will take the place of human beings in all jobs. |
| C．Self-driving cars will be able to talk like humans. |
| D．A criminal was caught for inventing facial recognition. |
If you meet a British person in the street, it is very likely that he or she will apologize (道歉) whether it is his or her fault (过错) or not.
It seems that Britain is becoming a nation where everyone is saying sorry. Almost each person says sorry about eight times each day — and one in eight people apologize as many as 20 times a day.
As you may have seen, the British apologize more often than members of other cultures. A research shows that in many cases, people’s love of saying sorry in Britain goes a little further than it does for Americans. For example, about 15 British people would say “sorry” while only 10 from the US would do this if they answered the phone, if they corrected someone’s mistake or if someone knocked into them.
In the old days, “sorry” was used to express sadness for having done something wrong. But now British people use the expression as a way of showing politeness. For example, they might say “sorry” instead of “excuse me”, “pardon”, “what” or “whatever”.
People in British also use sorry when they share the same feeling with others — so they might say “sorry about the rain”.
However, British people’s use of “sorry” may make things very confusing (迷惑不清) and difficult for foreigners who are not familiar with their ways. But actually, people in British pay much attention to the feelings of others. This is the reason why they apologize every day.
1. What does the underlined word “this” refer to?| A．say “sorry” | B．correct the mistakes |
| C．knock into people | D．show politeness |
| A．Americans say sorry more than British people. |
| B．Even British people get confused when they say sorry. |
| C．Almost every person in Britain says sorry 20 times a day. |
| D．The British also say sorry to share the same feeling with others. |
| A．like to talk about the weather | B．love to correct mistakes |
| C．are difficult to get along with | D．care a lot about others |
| A．What daily expressions British people often use. |
| B．How people in British communicate with foreigners. |
| C．The different meanings of sorry in and out of British. |
| D．Why British people say sorry many times every day. |
【推荐2】Are you tired of looking at the world in the same old way? Have people told you that you never see more than one side of the story? If so, then it’s time to become more open-minded so that you can live a better life. Open-minded people live an exciting and happy life. You can be one of them after a little hard work.
If you’re open-minded, you are willing to consider ideas and opinions that are different from your own. There are many things you can do to become more open-minded. For example, educating yourself is a good idea, and you can achieve this by taking some night classes and watching online classes, or just reading widely.
If you’re close-minded, you may think that you don’t have anything to learn from other people. So the next time you meet a new person or talk to an old friend, ask him more questions than before. Ask the person what he’s been up to that week or if he has read anything good lately. You will be astonished by how much you will learn. If you’re close-minded, you may love to argue about a topic because you think you’re completely right. Well, the next time you find yourself in the middle of a debate, you should take a friendlier way. Don’t tell the person why he is wrong. Instead, ask him to tell exactly why you should believe his points of view. You won’t change your own mind, but you’ll certainly like something new.
In a word, you should always learn something new. The world is changing. Don’t die with the old times but live with the new one.
1. Why should we become more open-minded?| A．To believe ourselves. | B．To live a better life. |
| C．To tell the person why he is wrong. | D．To ask others more questions. |
| A．Argue about a topic with others. |
| B．Change our own mind to believe what other people say. |
| C．Always learn something new. |
| D．You don’t need to learn from others. |
| A．Open-minded people see more than one side of the story. |
| B．Open-minded people live an exciting and enjoyable life. |
| C．Open-minded people look at the world in the same old way. |
| D．Open-minded people don’t die with the old times but live with the new one. |
| A．surprised |
| B．meaningful |
| C．surprising |
| D．successful |
A． | B． | C． | D． |
【推荐3】“Don’t ask what the world needs. Ask what makes you come alive, and go to do it. Because what the world needs is people who have come alive,” said Howard Thurman. Yes, one of the best ways to learn about other people and other places is visiting, connecting and experiencing them yourself. Traveling around the world opens your mind.
I remember when I was traveling, I began to know the world better. The world is not just about me, my small town and home. Although you will meet different people from all over the world, you will realize that people are similar in their dreams, hopes and feelings. Enjoy exploring the different cultures, and you will also find that people are different in some of the things they do and how they live. Once you understand their ways, it will not be strange or scary. Often you read stories about other cultures in books. Only when you visit their areas do you find that those stories are sometimes wrong.
One thing you may find out is that there are problems all over the world. You cannot just get money to be sent to these areas and hope that will work them out. The world should get involved and help wherever there are problems. People everywhere should be given a chance. It is so easy to ignore (忽视) this if one does not travel or explore. One can look around and see that so many people have many challenges bigger than ours. One can realize that sometimes our biggest problems are not that big after all.
On your journey you will meet a lot of new friends. Talking to strangers and finding about their lives is a great way to spend your time. You will certainly be more confident after having to deal with problems and make many decisions along the way.
When you travel, you have to be on your own in some situations. You will surprise yourself by how well you can do that. All your special experiences could make an interesting book to read. It would be filled with all your adventures (冒险) and special memories.
Traveling around and seeing so much happening in the world around us is a wonderful experience. If we could all just travel a little more and share our experiences, we would all be better people and the world would be a better place.
1. What’s Paragraph 2 mainly about?| A．We can realize our dreams by traveling. |
| B．We can better understand the world by traveling. |
| C．We can find stories in books are sometimes wrong by traveling. |
| D．We can know people all over the world are different by traveling. |
| A．Find out their problems. | B．Send them money. |
| C．Give them challenges. | D．Offer them chances. |
| A．Traveling makes one a better person. |
| B．Traveling makes cultures more colorful. |
| C．Traveling helps people solve problems. |
| D．Traveling helps people make more friends. |
| A．To show how traveling can change the world. |
| B．To tell people how to travel around the world. |
| C．To encourage more people to travel around the world. |
| D．To share the writer’s travel experiences with other people. |
【推荐1】Fast walking is the exercise between walking and race walking. A study shows that fast walking has become the most popular exercise in China and many people walk more than 5,000 steps a day. The results of the study are from QQ users. About 37% of the people choose fast walking as their favorite exercise; over 23% choose running and more than 14% choose riding bikes.
Fast walking and running are easy, cost little and work well, so they are popular. And many people would rather do exercise in nature than go to gyms. It’s best to walk fast for at least 10 minutes at one time and walk up to 6,000 steps every day.
The study also shows that people in Guiyang, Guizhou love sports most. On average(平均), everyone there walks 5,941 steps every day. It seems that people in places with better environment and air are more willing to(更愿意) do sports.
1. Many people in China walk more than________steps a day.| A．6,000 | B．5, 941 | C．5,000 | D．10000 |
| A．at home | B．in nature | C．in the gym | D．in the playground |
| A．people live in big cities are more willing to do sports |
| B．fast walking is not difficult, costs little and works well |
| C．it’s bad for people to walk fast for more than 10 minutes at one time |
| D．over 14% choose running and more than 23% choose riding bikes. |
| A．Mum’s Kitchen | B．Music Today |
| C．Story Time | D．Health & Sports |
On Christmas Day people get up very early. They often their presents and then ask all family members to have a nice breakfast. They also say “Merry Christmas” to each other.
1. Where do people get a tree.
| A．From the shop. | B．From the farm |
| C．From the hill. | D．From the neighbour (邻居) |
| A．Fruits | B．Lights | C．Lights and a star. | D．Stockings |
| A．An old man. | B．An old woman. |
| C．A beautiful girl. | D．A handsome (潇洒的) boy |
| A．Because they like to do that. |
| B．Because the stockings are beautiful. |
| C．Because the stocking are not theirs |
| D．Because Father Christmas will put presents into the stockings. |
| A．23rd, December. | B．24th, December |
| C．25th, December. | D．25th, November |
【推荐3】“A young woman was driving through the lonely countryside. It was dark and rainy. Suddenly she saw an old woman by the side of the road, holding up her hand as if she wanted a lift.
“I can’t leave her out in this weather.” the young woman said to herself. She stopped the car and opened the door.
“Do you want a lift(搭便车)?” she asked. The old woman nodded and climbed into the car. After a while, she said to the old woman, “Have you been waiting for a long time?” The old woman shook her head. “Strange.” thought the woman. She tried again. “Bad weather for the time of the year.” She said. The old woman nodded.
Then the young woman noticed that the old woman’s hands, which were large and hairy(多毛的). Suddenly she realized that “she” was a man! She stopped the car. “I can’t see out of the rear screen(后挡风玻璃).” She said. “Would you mind cleaning it for me?”
“The old woman” nodded and opened the door. As soon as “she” was out of the door, the frightened young woman drove off as fast as she could.
When she got to the next village, she stopped. She noticed “the old woman” had left “her” handbag behind. She picked it up and opened it. Inside was a gun(枪).
1. When the young woman talked with “her”, “the old woman” only nodded or shook “her” head because “she” ____________.| A．didn’t want the young woman to hear her voice. |
| B．didn’t want to trouble the young woman any more. |
| C．was so tired that “she” didn’t want to talk with her. |
| A．drove away as fast as possible. |
| B．thought of an idea. |
| C．drove her car to a village. |
| A．make “her” speak. |
| B．see more clearly. ‘ |
| C．throw “her” out. |
| A．kind and clever. |
| B．beautiful and bright. |
| C．strong and helpful |
| A．A policeman. |
| B．A. poor villager. |
| C．A. robber(强盗). |
