Coffeehas been a part of people’s lives for thousands of years, and today it is still one of the favorite drinks in the world．Many people in the world begin their busy day by drinking a cup of coffee or several cups of coffee．They have always said that a cup of coffee in the morning helps them begin their day in the right way．So they say a cup of coffee is necessary for them in the morning．

Do you know what in the coffee makes our bodies and brains active? It is caffeine（咖啡因）．Caffeine may increase a person’s mental and physical abilities（精力和体力）．For example, two cups of coffee will make you breathe faster and augment body temperature．All this makes your heart beat faster, and doctors warn that this may be a little dangerous．

Caffeine is found in tea, coffee, chocolate and some other foods．A little caffeine is probably not harmful．But too much caffeine can make people nervous and sleepless．

We can’t remember clearly since when we started to take our mobiles to a dinner table. This happens a lot, especially when we eat out. Once a dish comes, instead of  lifting our chopsticks（筷子）, we take out our mobiles and click. Later, we         

post the photos onto Weibo or Wechat, waiting to be “liked.” Then we check our mobiles from time to time during the meal, to see whether we get “liked” or not. We just cannot leave our mobiles for simply a meal. Does that sound familiar（熟悉的） to you? Do you do that often? If not, how do you feel when others do that when having dinner with you?

A recent study suggests that what we are used to doing is not that good. Spending time taking photos of food makes the food less pleasant(令人愉快的). To test this, some researchers did an experiment. Some people were asked to take photos before they could enjoy food. It turned out that the more photos they took,     . So, why not stop taking photos and just enjoy the food ahead of you?

Besides（除…之外） the scientific result, there are also some other bad influences of taking photos of food before meals. After posting the photos onto the Internet, one will be unable to control himself and check his mobile many times. “Does everyone accept my photo? I hope a lot of people like it!” It seems like your mobile secretly calls your name all the time, even when you are with real people.

So, next time you go out to have dinner with your family or friends, how about not taking photos of food? Let the food be delicious as it is and share your life with people around you. Trust me, it will be a wonderful time.

Can you name some foods in the meat group? Can you tell where they come from?

Your body is made up of (组成) millions of cells (细胞). Cells are very small.

Your body has to make new cells in order to grow. It also has to make new cells to take the place of the old cells that have been worn out.

To grow, the cells need a thing called protein (蛋白质). The protein you need most comes from foods in the meat group.

Fruit and vegetables are plant foods. Foods in this group give your body vitamins and minerals(矿物质). Your body needs vitamins and minerals to grow and to stay well.

The third food group is made up of bread. These foods come from grain. Your body gets heat and energy (活动) from these foods. It needs a lot of energy to work and play.

Milk is one of the best foods your body can get. It has protein, vitamins and minerals. Milk is good between meals or with meals.

Some foods are not listed in the four main groups. This is because you do not have to think about eating these foods. You eat them if you eat foods from the four main foods.

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There is a famous English saying “You are what you eat”, and it means what you put in your mouth will become part of you. Many experts (专家) use it to tell people it's important to have a good eating habit. For example, too much sweet food makes a person overweight（超重）. To avoid（避免） being fat, kids are told to keep off sweet food. But, a team of American scientists have found something new about eating sweet food.

“When we say some people ‘sweet’, we mean they are kind and friendly to us. Perhaps(也许) this word can help us learn more about people's feelings and acts.” said Brian Meier, a scientist from the study team. “Taste is something we experience every day. What we have done is to find whether we can know someone's character(角色) and behavior(行为) depending on their taste.”

In one of their experiments(实验), students were asked questions about their character－whether, for example, they were soft-hearted or not. Then they were asked to make a list of their favorite food. According to their answers, the scientists found that the students who liked sweet food were nicer.

In their another experiment, the scientists found that people who preferred sweet food such as cookies(小甜饼)and chocolate were more willing to help other people in need, and those who ate non-sweet food such as chips weren’t. For example, people with a sweet tooth were more likely to volunteer to clean up their city, visit sick children in the hospital and so on.

The result(结果) of the experiments is that people’s helpfulness or being nice has something to do with their taste for sweet food. So eating sweet food is a useful way to make people nice and helpful. Next time, try some ice cream.

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    Many people can’t get good and enough sleep because they are busy working and studying. Do you often wake up in the night? Can you get up easily on time? Do you feel tired after getting up? Can you put your heart into the class? Do you feel sleepy during the daytime? If your answer is yes, that means you get a bad night’s sleep.

But how to get good and enough sleep?

First, never drink coffee before bedtime. Second, don’t eat too much. Third, you candrink some milk before going to bed. Fourth, go to bed and get up at the same time every day.

Another way is to count numbers (数数) in your heart. It can give you fast sleep. Less than eight hours is not enough. Let’s keep a good sleep habit.

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Teeth are important. Strong , healthy teeth help you chew(咀嚼) foods that help you grow. They help you speak clearly. And yes ,they help you look best. Here are some tips for you to take care of your teeth:

  1Brush your teeth the right way.

Brush your teeth at least twice a day – after breakfast and before bedtime. If you can, brush after lunch or after sweet snacks, too. Brush all of your teeth, not just the front ones. Spend time brushing teeth along the sides and back of your mouth. Spend at least three minutes each time you brush. Play a song you like to help pass the time. Get a new toothbrush every three months. When you buy toothbrush, be sure it has soft bristles(鬃毛).

2Learn how to floss(用牙线清洁牙齿)your teeth.

Flossing is a very important way to keep your teeth healthy. Food may hide between two teeth. Flossing can help get rid of it. You’ll need to floss your teeth at least once a day.

3Have good eating habits.

You need to be careful about what you eat and drink. Eating sugar is a major cause of tooth decay(蛀牙).Eat lots of fruits and vegetables and drink water instead of soda(苏打).

Many people can’t get good and enough sleep because of the stress of working and studying. Do you often wake up in the night? Can you get up easily on time? Do you feel tired after getting up? Can you put your heart into the class? Do you feel sleepy during the daytime? If your answer is yes, that means you get a bad night’s sleep.

But how to get good and enough sleep?

First, never drink coffee before bedtime. Second, don’t eat too much. Third, you’d better take a shower before going to bed. Fourth, go to bed and get up at the same time every day.

Another way is to count numbers (数数) in your heart. It can give you fast sleep. Lying on the bed for long doesn’t mean you will have good sleep. It’s important for us students to get good and enough sleep. Less than eight hours is not enough. Let’s keep a good sleep habit.

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There is a famous English saying “You are what you eat”, anditmeans what you put in your mouth will become part of you. Many experts (专家) use it to tell people it's important to have a good eating habit. For example, too much sweet food makes a person overweight. To avoid being fat, kids are told to keep off sweet food. But, a team of American scientists have found something new about eating sweet food.

“When we say some people ‘sweet’, we mean they are kind and friendly to us. Perhaps(也许) this word can help us learn more about people's feelings and acts.” said Brian Meier, a scientist from the study team. “Taste is something we experience every day. What we have done is to find whether we can know someone's character(角色) and behavior(行为) depending on their taste.”

In one of their experiments(实验), students were asked questions about their character－whether, for example, they were soft-hearted or not. Then they were asked to make a list of their favorite food. According to their answers, the scientists found that the students who liked sweet food were nicer.

In their another experiment, the scientists found that people who preferred sweet food such as cookies and chocolate were more willing to help other people in need, and those who ate non-sweet food such as chips weren’t. For example, people with a sweet tooth were more likely to volunteer to clean up their city, visit sick children in the hospital and so on.

The result of the experiments is that people’s helpfulness or being nice has something to do with their taste for sweet food. So eating sweet food is a useful way to make people nice and helpful. Next time, try some ice-cream.

根据短文内容，选择正确答案。

     It is no surprise that more and more people like bicycling. It is fun, healthy and good for the environment. Maybe that’s why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bike can take you almost anywhere, and there is no oil（油） cost!

Get on a bicycle and ride around your neighborhood. You may discover something new all around you. Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work and benefit from the enjoyable exercise without polluting the environment.

You don’t even have to ride all the way. Folding(折叠) bikes work well for people who take the train. Just fold the bike and take it with you. You can do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a common bike with you when you fly. But be sure to look for information by visiting airline websites. Not all airlines are bicycle friendly to travelers.

Health Benefits of Bicycling:

◇It helps to prevent heart diseases.

◇Bicycling helps to control your weight.

 A 15-minute bike ride to and from work three times a week burns off kilos of fat in a   

 year.

◇Bicycling can improve your mood

Exercise like bicycling has been shown to make people feel better. More relaxed and self-confident. In short, bicycling is healthier than driving.

Baseball is one of the favorite sports in the USA. Children play baseball in sports fields or parks.

At summer picnic, there is often an informal baseball game. Boys and girls, young and old take turns to bat. There are nine players on each team.

The baseball season goes from April to September. During this time, baseball matches are showed on TV and members of the important baseball teams become America’s heroes (英雄). At the end of the season, the two top teams play against each other. Many baseball fans go together to watch the game. Millions of others listen to the radio or watch the television. People seem to talk only about the game. Even long after it is over, they still talk about the result and the players.

American football is perhaps the most popular sport in the USA. The football season begins when the baseball season ends. More people are interested in football than baseball. When there is an important game, thousands of people sit beside radios or in front of television sets to get the result.