Everyone likes living in a clean and comfortable environment. If the environment(环境) are bad， it will affect our body， and make us not feel well. Sometimes we may be terribly ill. At that time we don't want to work， and we have to stay in bed and rest at home. So the environment is very important to us.

    It's germs(微生物) that makes us ill. There are germs everywhere. They are very small and you can't find them with your own eyes， but you can see them with a microscope（显微镜）They are very small and there may be hundreds of them on a very small thing， Germs can always be found in dirty water. When we look at dirty water under the microscope， we shall see them in it. Germs can also be found in air and dust（灰尘）. If you cut your finger， some of the dust from the floor may go into it， and you will have much pain in it. Sometimes the germs will go into all of your bodies， and you will have pain everywhere.

    To keep us healthy， we should try our best to make our environment cleaner and tidier. This needs us to work together.

    There are many festivals in China, and the Spring Festival is the most important in China. So before it comes, everyone has to prepare（准备） things. Usually it is in January or February. In 2018, it will be on February 16th.The people buy pork, beef, chicken, fruit and many other things, and they often make a special kind of food called "dumplings". It means "come together". On that day before the festival, parents buy new clothes for their children. On the Festival Eve, all the family members come back to their hometown. This is a happy moment. They sing, dance and play all kinds of games. Others get the dinner ready. ①When they enjoy the meal, they give each other the best wishes for the coming year. Children usually get some Lucky Money （压岁钱）or red packets. At night, people let off fireworks to welcome the coming of the Spring Festival. ②All the people, rich or poor, old or young, are the happiest at this time.

根据短文内容简要回答下列问题.

    Teeth are a very important part of our bodies. Good teeth help you eat things like apples. They also help you talk. The healthier your teeth are, the happier you will be.

    You can take care of your teeth by brushing and flossing（用牙线清理）them.

    But before that, you have to pick a good toothbrush. Be sure your toothbrush are soft enough Also, brushes with small heads are better. They can reach every corner of your mouth.

    Now it's time to brush. Brushing helps break down plaque（牙菌斑）Plaque is a kind of bad thing that can make small holes in your teeth. Brush your gums at a 45—degree angle（角度）This works well to clean both the teeth and gums.

    Learn how to floss your teeth. It gets rid of food in the spaces between your teeth. Your toothbrush can't get there. Move floss between each tooth gently back and forth once a day. It may feel a little difficult at first, but pretty soon. You'll be good at it!

    Henry is an English boy. He is 14 years old. He visited Beijing with his family last summer. Then he became interested in(对……感兴趣) Chinese culture. He wanted to learn Chinese, so he asked his aunt to teach him. His aunt is from China. He also wanted to learn to play the erhu. But he didn't know where to buy one in England. So he asked his pen pal(笔友) Li Gang for help. Li Gang is a Chinese boy. He lives in Shanghai. He bought a erhu and mailed(邮寄) it to Henry. Now Henry is waiting for his package(包裹). He can't wait to receive it.

   ①  Hi, I'm Mary Brown. Look at this photo. Two girls are in it. They are my sisters, Linda and Jane.

  ②   Hi, I'm Harper Seven Beckham. I'm an English girl. Harper is my first name. Seven is my middle name. Beckham is my last name. Here's my family photo. This is my father David Beckham. That is my mother Victoria Beckham. Those are my brothers Brooklyn, Romeo and Cruz.

  ③   My name is Kimi. I'm not English. I'm Chinese. My father is Lin Zhiying. His English name is Jimmy. My mother is Chen Ruoyi. Her English name is Kelly. Oh, Angela and Cindy are my good friends.

  ④   Who am I? I'm Cindy. My Chinese name is Tian Xinchen. Tian Liang is my father. Ye Yiqian is my mother. Tian Chenyu is my brother.

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    Lily is from New York, the U.S.A. She is twelve. She is in Shanghai NO.3 Junior High School. She is in Class Eight, Grade One. Her phone number is 66786019. Dongdong is from Kunming. His English name is Tom. He is eleven .He is in Class Seven, Grade One. His telephone number is 24524233. They are not in the same class. They are good friends.