Sue: Hello, I want to buy some ping­pong balls. Can you help me?

Clerk: Sure. Do you like these balls or those balls?

Sue: I like these balls. How much are they?

Clerk: They're 2 dollars each.

Sue: I need three ping­pong balls.

Clerk: OK. Here they are.

Sue: Thank you.

Clerk: You're welcome.

    Different people have different feelings towards different things．Their mood is easily affected by some things around them．

    Peter is a cook．He has a big restaurant．He often cooks yummy Chinese food for people．In fact(事实上)he doesn't like cooking．If his mother asks him to cook after work，he will not be happy．Nothing but going hiking makes him happy．

    Mary is a businesswoman．She has a dictionary company． She often goes to other countries．She often feels ill, but she doesn't go to see a doctor．Then she joins a music club．She feels better soon．

    Ann is an artist．She often draws different kinds of pictures．If she can't find her pictures，she will be sad．So she treasures every picture．

    Betty is a housewife．She often does housework at home at day．She is very busy．In the evening，she often goes to the cinema．That's a happy time for her．

    Different people use different ways to deal with their feelings． If you're sad，what do you usually do? Listening to music，reading books，doing exercise…They may help you feel better．So if you're sad，please do some things to make yourself happy!

Chen Jie: I have a ruler.

Sarah: I have an eraser.

Mike: I have a pen.

John: I have a book and a bag.

    Hello, I'm Jack. This is my town. It's near the sea. The sea is big. There are some boats on the sea. You can see some mountains near the sea. You can see a river in my town. There's a lake near my school. It's a small but beautiful lake.

    Water is very important to living things. Without water there could be no life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves.

    Water is needed in offices, factories and schools. Water.is needed everywhere. There is water in seas, rivers and lakes.

    Water is found almost everywhere. Even in the desert of the world, there is some water in air. You can't see or feel it when it is part of air. The water in the seas, rivers and lakes is a liquid(液体). The water in air is a gas, and we call it water vapour (水蒸气).

    Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals(结晶体). Snow crystals are very small crystals of ice. Ice is frozen water. It is a solid (固体). There can be snow and ice everywhere in winter.

    Water may be a solid, a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is a liquid, you can drink it. When it is a gas, you can't see or feel it.

It's a rainy day. A woman with a dog gets on a bus. It's a big dog and its feet are not clean. The conductor doesn't want the dog to sit on the chair. But the woman says to the conductor, "Oh, I will pay for my dog. Can he sit here like the other people?" The conductor looks at the dog and says, "Yes, madam, but like the other people, he must not put his feet on the chair."