Question

【题目】 All living things on the earth need other living things to live. Nothing lives alone 【1】. Each kind of life eats another kind of life in order to live, and together they form a food chain. 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 them disappears.

【2】. But only plants can use sunlight directly. Plants are “factories”. They make food from sunlight, water and things in the soil 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. 【3】. Meat-eating animals are only eating plants indirectly.

What about our human beings? We are members of many food chains. We eat wheat, rice, vegetables, fruits and so on. We watched a display show. It was exciting. We also eat meat and drink milk. But men often break up the food chain, 【4】. They also make rivers, lakes and seas dirty. When these rivers, lakes and seas are polluted, the fish in them cannot be eaten. If men eat the fish, they will get strange diseases.

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

A. They burn forests and kill wild animals.

B. Food chains should not be broken up.

C. Sometimes one living thing kills another, one eats and the other is eaten.

D. All life needs sunlight to live on.

E. Some animals feed directly on plants and others eat smaller animals.

Answer 1

【答案】

【1】C

【2】D

【3】E

【4】A

【解析】

本文介绍了地球上所有的生物需要其他生物来存活，这样就形成了一个食物链。我们人类是许多食物链的成员。但是人类经常破坏食物链。因为每种生命形式与其他的生命形式都有联系，因此破坏食物链会让所有的生命处于危险中。

【1】根据Each kind of life eats another kind of life in order to live, and together they form a food chain.可知，此处介绍食物链，因此是一个生物吃掉另一个，故选C。

【2】根据But only plants can use sunlight directly.可知，此处表示所有的生命需要阳光来生存，故选D。

【3】根据Meat-eating animals are only eating plants indirectly.可知，此处表示有些动物吃植物，有些动物吃更小的动物。故选E。

【4】根据But men often break up the food chain,可知，人类经常破坏食物链，因此它们会烧毁森林，猎杀动物。故选A。