Question

All living things on the earth need other living things to live. Nothing lives alone. Most animals must live in a group, and even a plant grows close together with others of the same kind. Sometimes one living thing kills another, one eats and the other is eaten. Each kind of life eats another kind of life in order to live, and together they create a food chain (链条). Some food chains are simple, while others are not. But all food chains begin with the sun, and all food chains become broken up if one of the links (链接) disappears.

All life needs sunlight to live on. But only plants can use sunlight directly. Plants are ‘factories’. They make food from sunlight, water and things in the soil (土壤) and air. Plants feed all other living things. Animals can only use the sun’s energy after it has been changed into food by plants. Some animals feed directly on plants, others eat smaller animals. Meat-eating animals are only eating plants indirectly.

What about humans? We are members of many food chains. We eat rice, vegetables, and fruits and so on. We also eat meat and drink milk. But we often break up the food chains. We kill wild animals and also make rivers, lakes and seas polluted. When these rivers, lakes and seas are polluted, the fish in them can not be eaten. If we eat the fish, we will get strange illnesses.

Each form of life is linked (关联的) to all others. Breaking the links puts all life in danger.

1.Which living things can use the sun’s energy directly?

A．Animals.	B．Plants.
C．Animals and plants.	D．All living things.

2.Who often destroy the food chains?

A．Humans.	B．Animals.
C．Plants and animals.	D．Humans and wild animals.

3.Which of the following would be the best title for this passage?

A．The Sun’s Energy	B．Plants
C．Food Chains	D．Living Things

 

Answer 1

【答案】

1.B

2.A

3.C

【解析】

试题分析：

1.本文的第二段第一行有一句But only plants can use sunlight directly.意思为只有植物直接使用阳光，故本题选B。

2.本文的第三段第二行提到人类有一句we often break up the food chains，意思为我们经常破会食物链，故本题选A。

3.本文谈论了动物，植物和人类以及它们之间的食物关系，主要谈论的是食物链，故本题选C。

考点：本文是一篇介绍食物链的说明文。

点评：本文主要介绍了地球上的生命体都需要食物来维持生存，不同种类的生物是以食物为基点而相互联系，相互依存，但人类通常破坏这种平衡，从而导致自身的问题，每个生命体是相互依存的，破坏这种平衡会使所有的生命面临着危险，阅读本文时，应以这种食物关系而通读全篇，理解本文的主要内容，达到问题的解决。