Question

【題目】 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】

本文介紹了地球上所有的生物需要其他生物來存活，這樣就形成了一個食物鏈。我們?nèi)祟愂窃S多食物鏈的成員。但是人類經(jīng)常破壞食物鏈。因為每種生命形式與其他的生命形式都有聯(lián)系，因此破壞食物鏈會讓所有的生命處于危險中。

【1】根據(jù)Each kind of life eats another kind of life in order to live, and together they form a food chain.可知，此處介紹食物鏈，因此是一個生物吃掉另一個，故選C。

【2】根據(jù)But only plants can use sunlight directly.可知，此處表示所有的生命需要陽光來生存，故選D。

【3】根據(jù)Meat-eating animals are only eating plants indirectly.可知，此處表示有些動物吃植物，有些動物吃更小的動物。故選E。

【4】根據(jù)But men often break up the food chain,可知，人類經(jīng)常破壞食物鏈，因此它們會燒毀森林，獵殺動物。故選A。