一 How terrible it is!

一 I agree with you. It's our duty to protect them.

一 Please tell me if you need my help.

一 Sorry. I will never do it again.

一 Study harder, and we'll do better.

一 Sorry, Dad. I'll clean the house at once.

一 ______. They often use them to play games instead.

一 We must stop cutting down the trees.

一 I'm afraid you have to wear glasses to help see things ______.

    Once there was a boy named Jimmy. He started drawing when he was three years old, and when he was five he was already very     1 at it. He drew many beautiful and interesting pictures, and many people 2 his pictures. They thought this boy was going to be 3 when he was a little older, and then they were going to 4 these pictures for a lot of money.

    Jimmy's pictures were quite different from other 5, because he never drew on all of the paper. He drew on 6 of it, and the other half was always 7.

    “That's very 8,” everybody said. “No other people have ever done that before”.

    One day, somebody asked him, “Please 9 me, Jimmy. Why do you draw on the bottom (底部) half of your pictures, but not on the top half.”

    “Because I'm small,” Jimmy said, “and my brushes can't 10 very high.”

    Peter was a small boy. He lived with his parents in a small house near some hills. The people there were all poor.

    One night it was very dry and windy. When everybody was asleep, Peter suddenly heard some noise. It came out from the kitchen. He got up and walked to the kitchen. He found that the wood beside the stove was burning. There was no water tap (水龙头) in the house, so he could not put out the fire. He shouted loudly to wake up everyone in the house. Then he ran out of his house and knocked on the doors of many houses to wake the people up. They all left their houses quickly.

    At last the firemen put out the fire. Many people lost their homes. But luckily, all of them escaped the fire with a whole skin.

    In most parts of the world, many students help their schools make less pollution. They join “environment clubs”. In an environment club, people work together to make our environment clean.

    Here are some things students often do.

    ◆No—garbage (垃圾) lunches. How much do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used (被使用) again.

    ◆No—car day. On a no-car day, nobody comes to school in a car—not the students and not the teachers! Cars give pollution to our air, so remember: Walk, jump, cycle or run.

    Use your legs! It's lots of fun!

    ◆Turn off the water! Did you know that some toilets can waste (浪费) twenty to forty tons of water an hour? In a year, that would fill a small fiver! In environment clubs, students mend those broken toilets.

    We love our environment. Let's work together to make it clean.  

    Air is all around us. It is around us as we walk and play. From the time we were born air is around us on every side. When we sit down, it is around us. When we go to bed, air is also around us. We live in air. We can live        food or water for a few days, but we can't live for more than a few        (minute) without air. We take in air.

    When we are working        running, we need more air. When we are        (sleep), we need less air .We live in air,        we can't see it. We can only feel it when it        (move). Moving air is called        (windy). How can we make air move? Here        (be) one way. Hold        open book in front of your face, close it        (quick). What can you feel? What you feel is air.

提示：1. What animals do you like? Why?

2. Where are they from? 

3. What animals don't you like? Why not?