五、阅读短文,回答问题
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 own food, so they consume or eat the trees’ leaves. But sometimes hungry lions or other animals eat giraffes. When animals die, their bodies become part of the soil(土壤) and air to help the forest grow. So the ecosystem can keep on going.
Ecosystems come in lots of kinds and sizes. A backyard or even a big sea can be an ecosystem. The key thing is that an ecosystem has to be balanced. If there weren’t animals to 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 weather and natural disasters can change the ecosystems. Human activities like cutting down trees and hunting can also bring problems.
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.
前4题每题的答案不超过10个词,第5题的答案词数不限。
1. How many jobs are there in an ecosystem?
Three.
2. If the crane lives mainly on small animals, what is it in an ecosystem according to Paragraph 2?
It is the consumer.
3. What’s the most important thing in an ecosystem?
It has to be balanced./To keep it balanced.
4. What may cause an ecosystem to change?
Different weather, natural disasters and human activities.
5. What can we do to help protect the ecosystem?
We can stop people from cutting down trees.
