The children are talking about their dreams. Sandy likes painting. She has some painting lessons every week. She wants to be an artist. Mary likes dancing. She can dance beautifully. She wants to be a dancer. Tom is good at sport. He likes playing football. He wants to be a football player. Danny wants to be a policeman. He thinks policemen are cool. He likes films about policemen.

【1】Fires can burn down trees. They can hurt people. They are very dangerous. We must be careful with fires. What must we do when there is a fire? We must go outside quickly and never take the lift. We must call 119. We have a fire drill at school every year.

【2】A fire drill is not a real (真实的）fire. It helps us prepare (准备) for a real fire. First, the fire alarm sounds. Next we all line up in the classroom. Then we leave the classroom quickly. We mustn't run. We must leave all our things in the classroom.

【3】Then we walk down the stairs and go outside. We line up in the playground. Our teacher checks on us. We wait for the firemen to come.

    Shanghai changes a lot in transportation(交通).

    In the past, there were few cars. Now there are many kinds of cars. There were not any bridges above the Huangpu River. Now there are some bridges on it. There were no tunnels(隧道)under it.

    There were no undergrounds. Now there are many undergrounds. There were no light rails(轻轨)and maglevs(磁悬浮). Now there are some lights and maglevs.

    The changes make our lives more convenient(方便). I like the changes.

    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.