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 form a food chains( 食物链) 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 disappears.

All life needs sunlight to live on. But only plants can use sun-light directly. Plants are “factories”. They make food from sun-light, water and things in the soil and air.

Plants feed all other living things. Animals can only use the sun’s energy (能量)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 human beings? We are members of many food chains. We eat wheat, rice, vegetable, fruits and so on. We also eat meat and drink milk, but men often break up the food chains. They kill wild animals. They also make rivers, lakes and seas dirty. When these rivers, lakes and seas are polluted, the fish in them can not be eaten. If men eat fish, they will get strange diseases.

Each form of life is liked to all others. Breaking the links puts all life in danger.

根据短文内容选择最佳答案。

1.How does every living thing on the earth live?

A. each plant can live alone

B. each animal can live alone

C. it living things want to live, they must kill each other

D. every living thing on the earth can not live without others

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

A. animals    B. plants    C. both animals and plants    D. all living things

3.What do plants make food from? They make food from______

A. sunlight, water and things in the soil and air    B. water, sunlight and things in the soil

C. water and things in the soil and air    D. water sunlight and things in the soil

4.Who often break up the food chains?

A. human beings    B. animals    C. plants and animals    D. men and wild animals

5.which of following do you think is the best title for this passage?

A. animals    B. plants    C. food chains    D. living things

Answer

1.D

2.B

3.A

4.A

5.C

【解析】本文主要介绍了地球上的食物链。植物制作食物，动物吃植物。我们人类也吃植物和动物，但是也会打断食物链。每种生物都需要依靠其他生物去生活，如果食物链断了，可能导致所有的生物处于危险中。

1.D

细节理解题。根据All living things on the earth need other living things to live.可知地球上的每个生物需要和其他生物一起生活，故选D。

2.B

细节理解题。根据But only plants can use sun-light directly.可知只有植物能直接使用阳光，故选B。

3.A

细节理解题。根据They make food from sun-light, water and things in the soil and air.可知植物用阳光，水，土壤里的物质以及空气来制作食物，故选A。

4.A

细节理解题。根据We also eat meat and drink milk, but men often break up the food chains.可知我们人类经常打断食物链，故选A。

5.C

标题归纳题。根据Each kind of life eats another kind of life in order to live, and together they form a food chains( 食物链)可知本文主要介绍了食物链，故选C。

点睛：根据题干要求，在文中寻找答案所在的语句或段落，进行分析理解，词义猜测，概括归纳和推理判断，选出正确的选项。例如小题2，根据But only plants can use sun-light directly.可知只有植物能直接使用阳光，故选B。