A smile will tell people around you that you are a kind and friendly person. However,many people don't smile because they think they ugly teeth. For example, one of my classmates, Mile, doesn't have very nice teeth,so thatis why he seldom opens his mouth.he even says that he has lost cofidence because of his teeth.So it is very important for us to look after our teeth. In fact, a lot of people have this problem. Some people inherit teeth problems from their parents,while others'teeth are damaged because of bad habits,like heavy smoking,eating too much sugar or not brush-ing teeth often.If your teeth are in bad shape, you should see a dentist and ask for help. They can help improve your teeth and tell you how to take care of then.
   Smiling can help you to feel more confident and make other people think of you as a more friendly person. If you want to keephealthy, you should not only smile but also laugh. An Indian doctor called Kataria said that young children should laugh about 300 times a day, wile adults should laugh between 7 and 15 times a day. So please take this chance to smile and laugh now!

                                                                                      Have Your Heart in Your Mouth.

This expression means that you're really afraid or anxious about something. When your heart starts beating so much that you can feel a thumping(怦怦跳) in your throat, it may feel like you "have your heart in your mouth."
Have Butterflies in the Stomach
How did butterflies get in your stomach? Well, those really aren't butterflies in there. It is a way of describing those nervous feelings you might get before a test or a very important decision.These stomach flutters (跳动) are normal and happen to many people. Some people believe having a few butterflies might even help you perform better.
Sick as a Dog
If you've ever been very sick, you may have used this expression. Because dogs eat just about anything they find, they often get sick. So it's all right to describe someone who's not feeling well as being "sick as a dog".
Under the Weather
When it's rainy all day outside, how would you feel? This expression comes from the idea that bad weather might hurt a person's health and mood(心情).

A

      There are too many cities around the world. And each city needs water in many ways. Water on Earth falls mainly as rain. So the rainfall (降雨量) is important to each part of the world. And it is different from one city to another. The following chart shows the average (平均的) rain fall in four different cities in July and January.

No. 4 Middle School

Kunming, Yunnan

April 2nd, 2014

Dear Editor,

I live in a beautiful city. Many visitors come to my city. There are so many colorful peacocks (孔雀)here.

    The peacocks mostly (主要）live on the grassland of Dongfeng Square. Visitors can give them food freely. They usually throw food to them, and don't think about at all whether the food is right or not. Some of the peacocks became ill. Some even died after eating the bad food.

    I'm sure most of the visitors who throw food to the peacocks really like the birds, but they don't realize that they may be doing any harm.

    We should tell the visitors that what they have done is very harmful to the birds, and we also must stop this kind of thing from happening.

    Perhaps we can build some small shops beside Dongfeng Square to sell peacock food. For every one of us, it's our duty to give more love to these beautiful birds and to look after them carefully.

Yours,

Sun Yan

    Zhalong is a nature reserve in Heilongjiang in northeast China. It is one of the world's most important wetlands. The reserve offers food and places to live in for wildlife. It is an ideal home for different kinds of plants, fish and birds.

    Many birds live comfortably in Zhalong Nature Reserve all year round, but some only stay there for a short time. There are many fish in the wetlands, and the birds can easily catch them for food. Zhalong Nature Reserve is an important living area for red-crowned cranes. There are not many red-crowned cranes in the world. Some of them live in Zhalong.

    Some people want to change the wetlands to make more space for farms and buildings. This means there will be less and less space for wildlife.

    More and more birds are in danger because they do not have enough living space. Many of them died. The Chinese government wants to protect these endangered* birds, and they can be safe in Zhalong.

    Every year, a lot of visitors go to Zhalong to watch birds. This year, members of our Birdwatching Club are going to study the different kinds of birds in Zhalong and the changes in their numbers.

    We do a bird count once a year. We are now inviting middle school students to help. We need more people to help us count and do something to help the birds. Many people do not understand the importance of the wetlands. We hope this information will help them understand and make them do something to protect wildlife. 

    As we know, all living things have to eat food. For a man, a tiger, a fish, a bird, or even a worm, food is needed. We know all living things are sure to die without food. In every part of the world, different kinds of animals share living places and live in communities (群落) together. They are connected(联系) in a food chain.

    In a food chain, some living things are producers and some are consumers. Plants are producers because they use sunlight, soil and other things to make their own food. Animals are consumers because they have to eat other animals or plants.

    There are four different kinds of consumers in the animal world. A carnivore is an animal that only eats other animals. An herbivore is an animal that only eats plants. An omnivore is an animal that eats plants and animals. A scavenger is an animal that eats dead animal.

    Here is a picture of a food chain. The food chain shows how animal eat each other in a community. In the picture, you can see what animal or plant is food for another animal. See? The grass is food for a rabbit(兔子), which then becomes food for a hungry tiger. In this way, all of these animals are connected.