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Nearly all our food comes from the soil（土地）. Some of us eat meat, of course, but animals live on plants. If there were no plants, we would have no animals and no meat. So the soil is very necessary for life. The top of the ground is usually covered with grass or other plants. There may be dead leaves and dead plants on the grass. The waste matter（糞）from animals also falls on it.
All soil needs food. If we do not give it any, the plants will be weak. Farmers found that animals’ waste is the best food for the soil, but chemical fertilizers（化肥）are also very useful. The same crop（莊稼）should not be grown in the same place every year, it’s better to have a different crop. A change of crop and the use of a good fertilizer will keep the land good.
【小題1】Which of the following is true?

Nearly all our food comes from the soil（土地）. Some of us eat meat, of course, but animals live on plants. If there were no plants, we would have no animals and no meat. So the soil is very necessary for life. The top of the ground is usually covered with grass or other plants. There may be dead leaves and dead plants on the grass. The waste matter（糞）from animals also falls on it.

All soil needs food. If we do not give it any, the plants will be weak. Farmers found that animals’ waste is the best food for the soil, but chemical fertilizers（化肥）are also very useful. The same crop（莊稼）should not be grown in the same place every year, it’s better to have a different crop. A change of crop and the use of a good fertilizer will keep the land good.

1.Which of the following is true?

2.What does the writer tell us in the first paragraph?

3.Which is the best food for soil in the field?

4.Why do we often grow a different crop in the same place every year?

Air is all around us.It is around us as we talk and play, From the moment we were born , we are surrounded(圍繞) by air. When we sit down ,air is also around us ,we live in air .

All living things need air:living things cann’t live without air.

We can go without food or water for a few days ,but we can not live for more than a few minutes without air. When we are working or running ,we need some air. So we breathe faster than usual. When we are asleep, we need less air.

1.From the text ,we know that on the earth _____

2.The writer tells us that _____.

3.Which of the following things need air ?

4.Which of the flooowing is the first important thing for people’s lives ?

5.A man needs more air when he _____.