Do you like watching TV or playing games? How many hours do you use your phone a day? We call the time we spend on TV, computers and phones “screen (屏幕) time”.
In a study (研究), scientists (科学家) ask 577, 000 children how much time they spend on screens, schoolwork and sports every day. They find about 68% of them spend more than 2 hours on screens.
Two hours of screen time a day is bad for children’s health. The study shows harm (伤害) starts after 75 minutes of screen time for girls and 105 minutes for boys. Why is that? “Just because ▲ . In our study, 24% of boys spend an hour a day doing sports, but only 14% of girls do that,” Dr. Khan says.
So it is important for students to do sports and balance (平衡) their screen time. Tom has a “three-time system(系统) for his son Patrick—a “go time” for schoolwork, a “slow time” to play games or talk with friends on the Internet and a “green time” for sports. “We need to get children out and move. They can walk, ride a bike and play football,” he says.
1. From the passage, we know 68% of the 577, 000 children spend ___________ on screens.| A．more than 2 hours | B．an hour | C．75 minutes | D．105 minutes |
| A．girls can do sports well | B．boys do not like sports |
| C．boys take more exercise | D．girls do more schoolwork |
| A．actors | B．students | C．doctors | D．workers |
| A．girls shouldn’t spend time on screens |
| B．two hours of screen time is good for boys |
| C．it is important for students to do their schoolwork |
| D．children should do sports to balance their screen time |
相似题推荐
I am not happy these days. Please help me.
I want to be a member of the class volleyball team. I think I am good at volleyball. But our PE teacher says I can’t get into the team. He says I am too fat (胖的).
I really want to be a good volleyball player. This is my dream. Can you help me?
Jane
Dear Jane,
I’m sorry to know that you’re not happy.
You play volleyball well. But your PE teacher doesn’t like fat girls. If (如果) you want to be a good volleyball player, you must be slim. Why not go running with Mary every morning? Mary is the best volleyball player in our class. You can be like her if you try!
Allan Green
1. Why is Jane not happy?
| A．Because volleyball is not easy to play. |
| B．Because she can’t join the class volleyball team. |
| C．Because her PE teacher likes her very much. |
| D．Because she doesn’t have time for volleyball. |
| A．Allan Green’s classmate. |
| B．Jane’s classmate. |
| C．Jane’s PE teacher. |
| D．A good basketball player. |
| A．stop playing volleyball |
| B．eat much meat |
| C．talk with her PE teacher |
| D．go running every day |
| A．放弃 | B．努力 | C．想象 | D．希望 |
| A．Jane doesn’t play volleyball well. |
| B．Jane is really slim. |
| C．Jane’s PE teacher doesn’t like fat girls. |
| D．Jane wants to play for the school team. |
【推荐2】Susan is very fat! She wants to be thin. These days, she only has some bread and fruit juice for breakfast. For lunch, she often eats some fruit like an apple, a peach or an orange, she often doesn't have dinner. If she feels very hungry, she eats an egg. Then after several days, she becomes thin but very weak(虚弱). Then one day she gets very sick at a PE lesson and has to see a doctor. The doctor is very surprised at her food. He says, ‘’It’s important to be beautiful, but it is more important to be healthy. You must eat enough food. Eat more vegetables, Chicken and fish are good for your health but will not make you fat.’’
Then Susan eats enough food enough food every day and does much exercise, She becomes both thin and healthy
1. Susan has in the morning at first.
| A．some bread | B．some fruit juice only |
| C．some bread with fruit juice | D．some chicken |
| A．fat and weak | B．thin but weak |
| C．thin and health | D．fat but healthy |
| A．P. E. | B．Chinese | C．math | D．music |
【推荐3】Early to bed and early to rise makes a man healthy, wealthy(有钱的) and wise.
This is an old English saying(谚语). Do you know it before? It says that we must go to bed early and get up early in the morning. Then we should be healthy. We should also be rich (wealthy) and clever (wise).
This is true. The body must have enough（足够的）sleep to be healthy. Children of a young age should have ten hours' sleep every night. Children who don't have enough sleep can't do their work very well. They will not be wise and they may not become wealthy!
The body also needs exercise. Walking, running, jumping, swimming and playing games are all exercise. Exercise keeps the body strong.
Exercise also keeps the blood(血液)moving around inside the body. This is very important. Our blood takes food to all parts of our body. The head also needs blood. Exercise helps us to think better!
1. If (如果)we get up early and go to bed early, we'll _____.| A．have enough exercise | B．be healthy |
| C．think better | D．have strong blood |
| A．becomes wise | B．goes to school in time |
| C．won't do well in his work | D．has enough sleep |
| A．it makes him healthy | B．he has a lot of homework to do |
| C．he is strong enough | D．he does exercise |
| A．body | B．blood | C．children | D．head |
| A．Exercise does good to a person's head. |
| B．A student should have 10 hours' sleep. |
| C．It's good for you to get up early and go to bed early. |
| D．If you have enough blood, you'll be wise. |
【推荐1】When you think of robots, what is the first thing that comes to mind? Do you think of science fiction movies like Star Wars, where robots of all shapes and sizes are part of daily life? The word “robot” itself comes from a play written in 1920 by Karel Capek. In the play, people create robots to do some everyday tasks.
Today, most robots don’t look like human. Modern robots take many forms and are good at many things, from sweeping the floors in your home to working in factories. They are even exploring the surface of the moon. They bring many benefits (益处) to people. But there is an interesting irony (讽刺) in the world of robots which describes a surprising problem: What humans find easy is extremely complicated for a robot. However, what humans find difficult is pretty easy for a robot. For example, picking up clothes in a messy room is simple for people. But that kind of chore is very hard for a robot. Another example is the game of chess. People might find it difficult to win the game of chess all the time. But robots like Alpha-Go can be programmed to play it very well.
This is because robots are very good at doing things in controlled environments. However, moving through a room filled with random (随机的) objects is hard for robots, along with picking up objects of different shapes and sizes without damaging them. In short, it is very difficult for them to deal with certain types of variables (变量).
It turns out that one of the most difficult things to improve in robots is their ability to control objects. Luckily, great progress is being made in the development of robots. On the one hand, exciting developments in making human-like hands and legs are underway. On the other hand, the biggest progress might result from using virtual learning (虚拟学习) to “teach” robots through computer simulations (模拟).
In this way, robots can “guess” what to do without an order when they meet unfamiliar things in the real world.
Soon, robots may be able to do those things that humans find simple. That means big changes in what robots can do and how they can help us with daily tasks. Robots might make movies a reality.
1. What’s the purpose of the first paragraph?| A．To give an example. | B．To lead in the topic. |
| C．To explain what robots are. | D．To show how robots develop. |
| A．Picking up things in a mess. | B．Making cars in factories. |
| C．Washing the dishes. | D．Playing chess. |
| A．They can benefit people more by making improvements. |
| B．They can hardly develop until they look like human. |
| C．They will deal with new things depend on orders. |
| D．They will cause further problems for people. |
【推荐2】Babies don’t learn to talk just from hearing sounds. They are lip (唇) -readers too. It happens during the stage when a baby’s babbling (咿呀声) gradually changes from unclear voices into that first “mama” or “dada”. The baby in order to do like you has to find out how to shape their lips to make that particular (特别的) sound they are hearing, according to developmental psychologist David Lewkowicz of Florida Atlantic University, who led the study.
Apparently it doesn’t take them too long to understand the movements that match basic sounds. By their first birthdays, babies start changing back to look you in the eye again. It offers more evidence (证据) that quality (高质量的) face time with babies is very important for speech development more than turning on the latest baby DVD. But Lewkowicz went a step further. He and his student Amy Hansen Tift tested nearly 180 babies, groups of them at ages 4, 6, 8, 10 and 12 months.
How? They showed videos of a woman speaking in English or Spanish to babies of English speakers. They found that when the speaker used English, the 4-month-olds gazed (凝视) mostly into her eyes. The 6-month-olds spent equal amounts of time looking at the eyes and the mouth. The 8 and 10-month-olds studied mostly the mouth. At 12 months, attention started changing back toward the speaker’s eyes.
But what happened when these babies who were used to English heard Spanish? The 12-month-olds studied the mouth longer, just like younger babies. They needed the extra information to recognize the unfamiliar sounds. That fits with research into bilingualism (双语) that shows babies’ brains adjust themselves to distinguishing (区别) the sounds of their native language over other languages in the first year of life. The continued lip-reading shows the 1-year-olds clearly still are fit for learning. Babies are so hard to study that this is “a fairly heroic data set”, says Duke University cognitive neuroscientist (神经学家) Greg Appelbaum, who found the research so attractive that he wants to know more.
1. According to the first paragraph, babies ________.| A．like to figure out how to shape their lips | B．learn to talk just from hearing the sounds |
| C．might get its voice “mama” by lip reading | D．communicate with parents through gestures |
| A．Playing baby DVD nearby. | B．Teaching babies to read English. |
| C．Speaking with babies face to face. | D．Speaking different languages in front of babies. |
A． | B． |
C． | D． |
| A．carry on further research in baby learning |
| B．learn more about adults’ language learning |
| C．develop popular baby DVDS to earn more money |
| D．teach parents how to improve babies’ language skills |
| A．Babies Have Different Ways to Talk |
| B．Babies Try Lip-reading in Learning to Talk |
| C．Babies Are Suitable to Learn Two Languages |
| D．Babies Can Easily Accept Foreign Language |
【推荐3】It’s Saturday afternoon. You and your friends are planning to go to the cinema and have dinner together. Just as you start to go, your dad reminds you it’s your aunt’s birthday and the whole family are going out to dinner to celebrate. How can this end with a quarrel?
The tension between teenagers and their family mainly comes from the struggle to balance what they want with family hopes. You once spent most of your free time with your parents. When you want to spend more and more time with your friends, your parents may be upset. They feel you may be out of control. And you might feel angry that so many family requirements are placed on you. Here are a few things you can try to ease the tension between you and your family.
●Tell your plan to your parents in advance and ask them whether they have anything else to add to your plan.
●When your buddy activities interfere with a family event, try to find a way to do both. You can spend a little time with each group. You can go to the family event and ask to be with your friends next time. You can also invite your friends to the family event.
●Suggest doing something with your family. When your parents know you want to spend time with them, they will feel better.
The results cannot always make both satisfied. Anyway, the tension can be eased if you consider the feelings of your family as well as those of yourself and your friends.
1. What can be put in the blank according to the text?The Tension Between Teenagers and Their Family
| A．Problem | B．Reason | C．Way | D．Trouble |
| A．Because you don’t tell them your plan. | B．Because they feel your anger at them. |
| C．Because they feel you don’t love them. | D．Because they feel you may be out of control. |
| A．Your parents love you most. | B．Family should always come first. |
| C．Friends are important in teenagers’ life. | D．Family and friends are both important. |
