1. 阅读理解

    Trees are an important part of the Earth.They provide wood for buildings and things for making paper. They provide homesfor all kinds of insects, birds and other animals. For example, many birds livein trees. Many kinds of fruits come from trees, such as apples, oranges, pearsand peaches.

    Trees also help keep our air clean and ourecosystemshealthy. We breathe in oxygen and breathe out harmful gases. However, treesbreathe in harmful gases and breathe out oxygen. And trees can help other plantsgrow because they can hold the soil. Trees keep the soil from being blown away,so plants can fight against strong winds.

    Trees do much for us, our environment,other plants and animals, but we don't just love trees for that. Treescan also be very beautiful—tall enough to touch the sky and so big around thatwe can't even hug them. So we should stop cutting down trees and enjoy thebeauty of them.

1. （1） What can't trees provide?

   A . Wood for buildings. B . Things for making paper. C . Fruits for eating. D . Bread for eating.
3. （2） How do trees keep our air clean?

   A . They breathe in harmful gases. B . They breathe in oxygen. C . They breathe out harmful gases. D . They help make some rain.
5. （3） The underlined word "ecosystems" in Paragraph 2 means____________ in Chinese.

   A . 生态系统 B . 软件系统 C . 生态环境 D . 软件工程
7. （4） How do trees help other plants grow?

   A . They fight against strong winds. B . They hold the soil. C . They clean the soil. D . They provide the soil.
9. （5） What does the underlined word "that" refer to?

   A . Trees keep the soil from being blown away. B . Trees can be very beautiful. C . Trees do much for us, our environment, other plants and animals. D . Trees are tall and big.