《2025年通城学典课时作业本八年级英语上册译林版宿迁专版》

四、阅读理解。〔人与自然——生态系统〕
A forest is like a football group. It sounds unusual, but it's true. Each player does an important job, but they can't win by themselves, so they work together. The same is true of all plants and animals in a forest. They depend on each other to live. We call this an ecosystem.

There are three jobs in an ecosystem: producer, consumer and decomposer. The trees in the forest produce food by themselves. Giraffes themselves can't make their food, so they eat or consume the trees' leaves. But sometimes hungry lions or other animals eat them. When animals die, their bodies become part of the soil and air to help the forest grow. So the ecosystem can keep on going.
Ecosystems come in lots of kinds and sizes. A back garden or even a big sea can be an ecosystem. The key thing is that an ecosystem has to be balanced(平衡的). If there weren't animals that eat giraffes, giraffes would eat too many leaves. This wouldn't be good for the trees, and this would make it difficult for giraffes to find food. Different kinds of weather and natural disasters can also change the ecosystems. People can also bring problems by cutting down the trees and so on.
Ecosystems are everywhere. They play an important part in our life. It is necessary for us to do what we can to keep them working well.
( D ) 1. (创新考法·写作手法)How does the writer start this text?
A. By listing numbers.
B. By asking a question.
C. By telling a story.
D. By giving an example.
( C ) 2. What can we know from the third paragraph?
A. People plant many trees every year.
B. It's difficult for giraffes to find food now.
C. The terrible earthquake can change the ecosystems.
D. Ecosystems only come in a back garden or a big sea.
( A ) 3. Why did the writer write this text?
A. To ask people to protect the ecosystems.
B. To introduce different jobs in the ecosystems.
C. To teach us how to keep ecosystems balanced.
D. To show the writer's ideas of protecting animals.
( A ) 4. In which part of a newspaper can we read the text?
A. Nature.
B. Sports.
C. Food.
D. Arts.

答案： 1. D 2. C 3. A 4. A