Do you feel like sleeping after lunch？What should you do about it？Don't drink coffee or tea! Instead，take a nap（打个盹）. A nap may make you more energetic（活力的）. You will remember things better and make fewer mistakes．Also，you can learn things more easily after taking a nap．It may even cheer you up． But there is some advice you should follow about taking a nap．

First，take a nap in the middle of the day，about eight hours after you wake up．

Next，a 20-minute nap is good．If you sleep longer，you may fall into a deep sleep．After a deep sleep，you will feel worse．

And you should set an alarm clock．Then you can fully relax during your nap．You won't have to keep looking at the clock

The next time you feel like sleeping after lunch，don't get worried．Put your head down，close your eyes and take a nap．

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There is an old English saying. It tells us that we must go to bed early and get up early in the morning. Then we shall be healthy. We shall also be rich and clever. This is true. The body must have enough sleep to be healthy. Children of young age should have ten hours’ sleep every night. Children who do not have enough sleep cannot do their work well and they may not be healthy.

The body also needs exercise. Walking, running, jumping and playing games are all exercise. Exercise keeps the body strong. Exercise also helps the blood to move around inside the body. It is very important. Our blood moves to all parts of our body. The head also needs blood. Exercise helps us to think better.

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There is an old saying: Early to bed, early to rise, makes a man healthy, wealthy(富有的) and wise. It means that we should go to bed early and get up early the next morning. By doing this, we will be in good health. And we’ll also be rich and clever.

   It’s true that our bodies need to have enough sleep to be healthy. Children should have a ten-hour sleep every night. Those who do not have enough sleep can’t do their work very well. They will not be clever and they may not get wealthy in the future.

   The body needs exercise as well. Walking, running, jumping, riding bikes and playing games are all exercises. Exercise helps to keep the body strong. It also helps the blood(血液) to move around inside the body. The blood takes food to all parts of the body. The head needs blood, too. So exercise helps people think better.

The computer is fast and hardly makes a mistake, while people are slow and make mistakes sometimes. That's what people often say when they talk about computers. For many years，scientists have been improving computers. Now a computer can do a lot of everyday jobs wonderfully. It is widely used in factories，hospitals，post offices and airports. A computer can report, decide and control in almost every field. With the help of a person，a computer can draw pictures，write music，talk with people, play chess, translate languages and so on. Many computer scientists are now thinking of making computers “think” like man. Perhaps computers will one day really think and feel. Some people are afraid that one day computers will be too clever to listen to them. But scientists tell us that such a thing will not happen.

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.

Everyone must have such experiences of setting off fireworks and firecrackers(烟花爆竹) during winter holidays. But this year, stricter regulations(规则) on fireworks and fireworks and firecrackers have been made by many cities and provinces. The reason why they take this action is that air pollution is getting worse and worse all over China since last year. Different cities have taken different measures(措施) to prevent that. For example, Beijing has told citizens that if there is anyone who breaks the rule again, setting off fireworks and firecrackers will be completely banned(禁止). Shanghai even asks people to write down their real names and addresses when they buy fireworks.

The more fireworks, the more serious the sir pollution will be. Although many people are quite sure of it, tradition still prevails(盛行) in some rural areas(乡村地区). People there believe that fireworks and firecrackers are useful to drive away evil spirits(恶魔) and pray(祈求) for the safety in the future. People who live and work in cities follow the tradition when they go back to their rural homes for the Spring Festival, which is also a strong symbol of family reunion(团聚). In big cities, however, citizens are ready to give up the pleasure of setting off fireworks to have some fresh air during the Spring Festival.

All in all, people should think twice before they make a choice between practicing customs and enjoying a healthy life.

A thousand years ago, Hong Kong was covered by a thick forest. As more and more people came to   (1)  in Hong Kong, these trees   (2)   down and burnt. Now there is no forest left,   (3)   there are still some small areas covered by trees. We call   (4)  woods. Elephants, tigers, and many   (5)   animals were living in the thick forest. When people came to live in Hong Kong, the animals began to die out. Early farmers grew rice and   (6)  pigs and chickens in the valleys. They cut down the trees and burnt them. They needed fire to keep themselves warm in winter,   (7)  their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. So did most of the wolves and tigers. Monkeys and many other animals soon   (8)  in the same way.

   You might think   (9)   there are no longer any animals in Hong Kong   (10)  in the zoos. There are still about 36 different animals   (11)   there. One of the most interesting of Hong Kong’s animals   (12)   the barking deer. These are beautiful little animals   (13)   a rich brown coat and a white patch under the tail. They are as     (14)  as deer but they are much like a dog barking. In Hong Kong the barking deer has only   (15)  real enemy--men. People hunt these little animals though it is illegal(违法的). There are now not many barking deer left. So it is important for people to protect wild animals.

The world is in great need of fresh water.About 97% of water on Earth is salt water.Man can only drink or use the rest which comes from rivers，lakes and the underground.The number of people in the world is becoming larger and larger，so we need more and more fresh water.Now water shortage (短缺) becomes a big problem.And people are trying their best to find more ways to get fresh water.

Then what can we do about it？Scientists have found some ways to turn salt water into fresh water.One important way is to boil (煮沸) sea water at a high temperature.In this way，we can make a lot of fresh water.But it often costs too much.And heating is not the only way to get fresh water.

People also have other ways，such as digging deep wells (井)，keeping rainwater and protecting rivers from being polluted.

Which way is better？I think to get the most fresh water with the least money is the best.And most importantly，everyone should take part in saving water.And itˈs not difficult.We should just try not to waste any water in our everyday life.

What time of day can you think most quickly? Are you a morning person? Or does it take you a few hours to get your brain(大脑)going? A lot of recent research suggests that we should pay attention to our body clock. It can tell us what time of day we can perform best at.

Many people work best later in the morning. This is because the body’s temperature rises quickly. But everyone’s body clock is different and some are special. Morning people will get up early and work better early in the day. Evening people will work later but work better towards the end of the day.

Research shows that we’re better at some activities at certain times of the day. Physical performance(体能)is at its best between 3 pm and 6 pm, so it’s better to exercise later in the day.

Between noon and 4 pm, people begin to pay less attention. This is because we think less quickly ager a big meal. Research also shows we become sleepy around 2 pm. This is why people in Spain take a short sleep in early afternoon.

Finally, it is better to eat when we’re active. This allows our body to burn calories(卡路里)better and stops our blood sugar levels（血糖）from getting too high.