My name is Lily．I'm 12 years old．I'm 1.45 metres tall．I'm 40 kilograms．I have a twin sister．Her name is Lucy．She is 1 cm shorter than me．I'm 3 kilograms heavier than her．Her hair is longer than mine．Last weekend we bought two pairs of shoes．I wear size 35 shoes．She wears size 36 shoes．

    Hello! I'm Dolly. ①I work at a hospital. ②I'm a nurse. My house is not far from the hospital. ③So I walk to work.④And my brother is a teacher.⑤He goes to work by car.

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        Today is Sunday. We don't have classes at school. Look! Zhang Peng and Mike are playing football. Sarah is drawing a picture. Chen Jie and Amy are reading books in the library. Wu Binbin is cleaning the blackboard in the classroom. What are Tom and John doing? They are playing computer games in the teachers' office. What am I doing? I am talking to you. We are all very happy.

    Hello, I'm Xiaoyong. I'm a clever (聪明的) boy. I'm ten. I like football and basketball. I don't like swimming or skipping. I like riding bikes. I have got (有) two toy cars. One is blue. The other one (另一个) is yellow. I like them very much (非常).

    The air is everywhere around us. Air has no colour. We can't see it. When it moves, we can feel the air. Air is very important to our lives. People and plants can't live without it. If there was no air, there would be no life.

    Aeroplanes can't fly without air. The air holds up the planes. We can't make fire (生火) without air. If you cover (盖住) a burning (燃烧的) candle with a glass. It will quickly go out (熄灭).

    Sound spread (传播) through the air. Without air, we can't hear.