It might be fun to use your smartphone. But be careful that too much screen time may be harmful to your health.
First, it is bad for your eyes. A researcher called Sarah Hinkley says the problem comes from the blue light that the screen gives out. Looking at a smartphone for a long time can cause eye strain, headaches and dry eyes. So it is a good idea to take a break every 15 minutes when you are working at a computer or using a smartphone.
Second, screen use can do harm to children’s brains. A new study shows that using screens too much can influence how children’s brains grow. If children use screens for more than one hour a day, they might have lower levels of white matter in their brains, which is a key to the development of language and reading skills. So it is wise to cut down the time of children using all kinds of screens.
Third, using screens too much will influence your sleep. According to a study, about 95% of the people between the ages of 13 and 64 use electronics before bed, especially the young people under 20. Doctors say that the light from those electronics at night may make you excited before you go to bed. Then it’s hard for you to get enough sleep. So you’d better turn off smartphones, TVs and all other screens an hour before your bedtime.
To keep healthy, doctors and researchers strongly advise that you shouldn’t use screens for long hours.
1. What can the blue light from your screen cause?2. How often should you take a break when working at a computer or using a smartphone?
3. How can parents prevent levels of white matter getting lower in their children’s brains?
4. Do you think smartphones are important? Why do you think so? Write 30 words or more.
相似题推荐
【推荐1】Beyond its influence on health, not getting enough sleep can lead to car accidents or other mistakes. Here are what sleep researchers have found about sleep.
How much sleep do we actually need?
It is known that all of us naturally need no less than eight hours of sleep per night. When we sleep below six hours per 24. We’re at an increased (增加的) risk of health problems. Some of us think we can make up any of those hours lost during the week on the weekends. Sadly there is no storage system (存储系统) for sleep in the brain.
Can we drink coffee instead of sleeping?
Coffee can keep us awake. Remember, too much coffee may throw off our sleep and energy cycles. So limit coffee and avoid caffeine for four to six hours before bedtime.
Does a sense of purpose connect to sleep quality?
A new research suggests a kind of strong connection between purpose in life and sleep. People who have a greater sense of purpose usually have better physical and mental health, which in turn explains their higher-quality sleep. Perhaps developing a sense of purpose in life could be as useful at improving sleep as the healthy habits above.
根据上面短文的内容填空。
1. Not getting enough sleep can
2. All of us need at least
3. We cannot
4. Don’t
5. Perhaps developing
【推荐2】Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing when you are happy.
Some scientists believe that birds sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.
Do you know what a “territory” is? A territory is an area that an animal, usually the male, considers as its own. Only he and his family are welcome there. No other families are welcome. Your house is your territory where only your family and friends are welcome. If a stranger enters your territory and threatens (吓到) you, you might shout. Probably this would be enough to frighten (使惊吓) him away.
If so, you have actually frightened the stranger away without having a fight with him, a bird does the same thing. But he expects an outsider almost any time, especially at nesting (筑巢) season. So he is screaming (尖叫) all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.
1. Why is a bird singing most of the time? (不超过15个词)2. What is a bird’s “territory”? (不超过15个词)
3. Why might people shout if a stranger enters their territory? (不超过10个词)
We all love food. But when you can’t finish your meal, how do you feel? You might think that wasting a little bit of food isn’t a big deal.
But when a whole school started to save food in their cafeteria (食堂), there was a big change. At Hengyang No. 1 Middle School in Hunan province, students are told to take no more food than they need. “There used to be 100 kg of food waste (浪费) every day. But now, the amount (数量) of waste is down (下降了) by 75 percent,” said the cafeteria’s manager.
In China, people waste 35 million (百万) tons of food each year. That is enough to feed the entire country of South Korea (韩国) for a year.
Food waste is a big problem around the world. According to the United Nations (UN, 联合国), there are 820 million people living in hunger today. But every year, the world wastes 1.3 billion (十亿) tons (吨) of food. That’s one-third of all the food we have.
1. Do people waste 35 million tons of food each year in China,?2. How much food do students waste in No. 1 Middle School in Hunan province every day now?
3. According to the United Nations, how many people are there living in hunger today?
4. Do you think it’s necessary for us to save food (节约粮食) ? Why or why not ?
Our lives are made up of our habits, the things that we do often and almost without thinking. They are often things that are hard to stop doing. Good habits make us happy and bad habits don’t. For example, we may think eating too much junk food makes us happy but, in the future, we will be sad. Developing good habits will help us love our lives.
To form a good habit, a goal is needed. There are many habits we may want to have, like doing more exercise. Make sure your goal is accurate, for example, to run a race in six months’ time. Start small. Don’t try and do too much immediately. You might give up. Remember that the journey of 1,000 miles begins with one single step! Start with an action so small that you can’t say no. For example, run for just three minutes every day. It seems silly, but the important thing is to repeat the action and not stop! Be patient and don’t expect success immediately.
There are three elements（要素）to form a habit. Use these to help you:
*The signal to do something
Leave your running shoes by the front door. This is the signal to run.
*Doing the thing
Run for three minutes. After a week, increase to five minutes, and so on.
*A reward for doing that thing
After the run, watch your favourite TV show.
| Developing good habits | |
| What is our habit? | *They are the things that we do often and almost without thinking. *They are often things that are not |
| *Set an accurate goal. *Don’t try and do too much immediately. *Start with a *The important thing is to | |
| What are the elements to make a habit? | The following elements may be *The signal to do something *Doing the thing *A reward for doing that thing |
What do you want to do when you are on holiday? Visiting an amusement park may be a good choice. It is a chance for family members to enjoy a day together. Before you go to an amusement park, you should have a plan to make your time more flexible（灵活的）.
1 Find out when is the busiest time of year and day of the week at the park. Try to choose a time when not so many people are visiting the amusement park.
2 Get a park map to organize your day. This can help you to visit the park in an organized way. Moving back and forth in the park too many times can waste a lot of time. Try to see all the attractions in one area before moving to another section of the park.
3 Set a budget（预算）. Amusement parks can be expensive. Decide how much you will spend on food and attractions, and any other possible costs. Setting a budget will help you to control your spending.
4 Decide what are the must-see attractions at the amusement park. If you don't have much time to visit the whole park, you can see the attractions that you most want to see first. This will help stop you from missing the things that you are most interested in.
1题判断正（T）误（F）；2题、3题根据短文内容补全句子；4题回答问题；5题把文中画线句子译成汉语。
1. It's a good idea to visit an amusement park when you are on holiday.
2. Don't try to visit the park at the
3. If you want to better organize your day, a park
4. What can we learn from the last paragraph?（不超过十个词）
5.
【推荐3】Do you always feel busy and tired but still there is lots of work waiting for you to do? You are too busy to have time for your hobbies. How could you find more time in you day? There are lots of ways to do that.
Get up earlier
Get up fifteen minutes earlier. Getting up just a little earlier can give you some free time. You don’t need to do all the things in a hurry (匆忙) or leave home without having breakfast. It’ll give you time to sit down and enjoy your breakfast. Maybe you can use that fifteen minutes a day to read through a book or a magazine.
Make a plan
At the start of your day, make a plan. Write down three important tasks (任务) you want to finish quickly that day. Put a big star next to the most important. Now, before you get into the busy work, start on the important task and finish them one by one.
Many people don’t spend any time in planning their day. They end up spending lots of time on unimportant tasks without really finishing anything big.
Finish Work on Time
Finally, one of the best ways to make more time in your life is to finish your work on time! If you’re students, you must finish your homework on time every day.
If you try these ways, you can have many more hours in a day. What do you want to do with these hours every week? It’s up to you. You can do anything you like to make your life happier and better.
1-2题完成句子；3题简略回答问题；4题在文中找出同义句；5题将文中划线句子译成汉语。
1. Getting up just
2. One of the best ways to make more time in your life is
3. When should you make a plan?
4. Many people spend no time in planning their day.
5.
