We each have a memory(记忆力). That’s why we can still remember things after a long time. Some people have very good memories and they can easily learn many things by heart(心), but some people can only remember things when they say or do them again and again. Many of the great men of the world have got surprising memories.

A good memory is a great help in learning a language（语言）. Everybody learns his mother language when he is a small child. He hears the sounds, remembers them and then he learns to speak. Some children are living with their parents in foreign（外国的）countries. They can learn two languages as easily as one because they hear, remember and speak two languages every day. In school it is not so easy to learn a foreign language because the pupils（学生）have so little time for it, and they are busy with other subjects, too.

But your memory will become better and better when you do more and more exercises.

The giant panda

Population    in the wild: about 1,600

Appearance   Weigh at birth: about 100—200 grams

             Adult weight: about 100—150 kilograms

             Colour: black and white

   A giant panda is a kind of bear. It has a white face with black patches around its eyes. It also has black ears, shoulders and legs. The rest of its body is white.

   Pandas live high up in the mountains of Central and Western China. They live in the bamboo. In zoos, their menu includes bamboo, apples and carrots. A giant panda can eat as much as 30 kilograms of bamboo a day.

   Pandas like to live on their own. They need to eat a lot stay healthy, so they spend more than 12 hours a day eating. Although they are big and heavy, it is not difficult for them to climb trees. They are strong enough to protect themselves.

   Pandas live for about 20 years in the wild, but in zoos they can live for up to 35 years.

   People are cutting down forests, so the pandas are losing their homes. Some people are killing them for their fur. It is cruel of them to do so. There are not many pandas in the world now. It is important for us to protect them.

①Pandas are killed by some cruel people.

②pandas can’t protect themselves

③Some people damage the forests.

④pandas only live for about 20 years

These days the kids' health is more important for their parents．Parents want to get more advice about it．

Being fit means a person eats well, gets a lot of exercise, and has a healthy weight(体重)．If you're fit, your body works well and you often feel well．Of course, parents may help their kids do something, such as cooking healthy meals for their kids or taking a trip to the countryside with their kids．But the kids themselves can also do something to keep healthy．

Here are some rules for kids to keep fit:

◆Some food is delicious, but you can't eat too much．

◆Eat different kinds of food, especially(尤其)fruit．

◆Drink water and milk often．

◆Listen to your body．When you're eating, notice how your body feels and when your stomach feels full．

◆Dont' watch TV too much．

◆Go to bed early．

①To drink a lot of juice  ②To eat different kinds of food   ③To drink plenty of water 

  　　   ④To go to bed early

A lot of people play sports．but very few people become sports professionals．If sports aren’t going to be your future，then why should you play them? Why should you train every day? Why should you work hard and feel sore the next day? Wouldn’t it be better to forget sports and only pay attention to your lessons?

There are actually a lot of good reasons to play sports．First of all, sports are a great way to exercise．Exercising keeps you healthy and strong．It also helps you stay in a good state．When you exercise，your body produces endorphins(内啡肽)．Endorphins give you more energy and make you feel happier．

Sports are important for everyone，but they are especially important for young people．They teach young people about winning and losing.Also,they teach young people how to communicate and work as a team．For example，when you play football，you must learn how to communicate with your teammates and work together.Sports teach young people to respect their coaches，teammates，and people they fight against as well．

 Many reports say that sports help young people stay out of trouble．If a young person plays sports，he or she is less likely to have problems．This is because sports teach people about rules．They also teach people that if they work hard，they might succeed．

 Another good way of sports is that they make people leave their houses．These days，a lot of people spend too much time watching television and playing video games. When you play sports,you go outside and exercise in the sun．You take in fresh air．All of these things are important．

 You’re probably not going to become a sports professional，but that doesn’t matter．Sports will help you become a better and happier person.Sports will help you make friends and stay healthy．Here is another good reason to play sports：Sports are fun．

How could we tell time if there were no watches or clocks anywhere in the world?

The sun was probably the world’s first “clock”, except(除了) in the far north, where the Eskimos(爱斯基摩人) live. There, it’s dark most of the winter, and light most of the summer. But in most of the world, people have used the sun. Even today, if you don’t have a clock, you still know that when the sun shines, it’s day, and when it’s dark, it’s night. The sun can also tell you whether it’s morning, noon, or afternoon.

People who live near the sea can tell time from the tides. In the day time, for about six hours, the water rises higher and higher on the beach. And then it goes down and down for about six hours. The same thing happens again at night. There are two high tides and two low tides every 24 hours.

Seaman on a ship learn how to tell time by looking at the moon and the stars. The whole sky is their clock.

In some places in the world the wind comes up at about the same time every day or changes direction or stops blowing. In these places the wind can be the clock.

A sand clock is an even better clock. If you had fine dry sand in a glass shaped like the one in the picture, you would have what is called an hour glass. The sand in the hourglass goes from the top part to the bottom part in exactly an hour. When the hourglass is turned over, the sand will take another hour to go back again.

A healthy eating habit along with enough exercise can help you keep healthy. When you are young, it is important to give your body what it needs. If you skip meals, you can’t get enough calories (卡路里). And then you may feel tired. By the way, the calorie is just another word for energy. About 50% of your calories should come from rice, bread, vegetables and fruit. You also need to drink a lot of water, 6 to 8 glasses a day. Drinking enough water can make your body work better and make you healthy.

    Exercise can help to make you look good, feel good and be healthy. Scientists say that kids should spend at least 30 minutes exercising a day, five times a week. It is easy to do! You can walk or ride your bike to school, and play sports at school. However, kids often give up sports, saying they have no time left after finishing their homework. In fact, doing exercise can help them sleep better and do better in their lessons.

    If you follow the advice above, you will look and feel much better and become healthy.

The earth moves round the sun, and the moon moves round the earth. When our part of the earth turns to the moon, it is night.

   The sun is much bigger than the moon. But sometimes the moon looks bigger than the sun, because it’s much nearer to the earth.

  The sun is very bright. It gives a very strong light. The moon looks quite bright, too. But it doesn’t give any light at all.

    The moon looks much bigger and brighter than the stars. But actually the stars are much bigger and brighter than the moon. They look smaller than the moon because they’re much farther away from us.

Have you ever heard of e-waste(电子垃圾), which can be produced every day? How do you deal with your computers, MP4 players and mobile phones when they’re broken or you want a new one?

Most people just throw them away. With the development of electronic industry(电子产业), e-waste pollution has become a serious problem. According to the United Nations, in2014, people around the world produced 41.8million tons(吨) of e-waste and only recycled 6.5 millions tons. The US the biggest waster, producing 7.1 million tons. China came second, with 6 million tons.

   It’s important to pay attention to e-waste. It can either be valuable or harmful, depending on how we deal with it. E-waste is a valuable urban mine(城市矿藏). The value of the metals, like gold and silver in the waste around the world, is surprising. And the metals can be reused. But if people throw them away, the toxic chemicals（有毒化学物质）can get into the earth or air, affecting  the environment and people’s health.

Apple, for example, now recycle people’s used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce e-waste, we can buy longer lasting electronic products. If you have unwanted electronics, find a new home for them. You can also take computers and phones to see if companies offer recycling programs.