All living things on the earth need other living things to live with. Nothing lives 46 . Sometimes one living thing kills 47 . Each kind of life eats another kind of life 48 live, and together they fo 题目和参考答案——青夏教育精英家教网—

题目内容

All living things on the earth need other living things to live with. Nothing lives 46 . Sometimes one living thing kills 47 . Each kind of life eats another kind of life 48 live, and together they form a food chain(食物链). Some food chains are simple, while others are not. But 49 food chains begin with the sun, and all food chains become 50 if one of the links disappears.

All life needs sunlight to live on. But only plants can use 51 directly(直接地). They make food from sunlight, water, air and so on. Animals can only use the sun’s energy 52 it has been changed into food by plants. Some animals feed directly on plants. Others eat smaller animals. Meat-eating animals are only 53 plants indirectly.

What about human beings? We are members of many food chains. We eat wheat, rice, vegetables, fruits and so on. We also eat meat and drink milk. But 54 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 55 be eaten. If people eat the fish, they will get strange diseases.

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

( ) 46. A. alone B. lonely C. together D. happily

( ) 47. A. other B. the other C. another D. the others

( ) 48. A. for B. so that C. and D. in order to

( ) 49. A. any B. all C. some D. most

( ) 50. A. better B. broken C. stronger D. nicer

( ) 51. A. moonlight B. laser light C. sunlight D. bright light

( ) 52. A. after B. before C. until D. by the time

( ) 53. A. making B. catching C. eating D. feeding

( ) 54. A. sunlight B. animals C. plants D. people

( ) 55. A. can B. cannot C. must D. needn’t

46-50:ACDBB 51-55:CACDB

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Air is all round us．It is around us___31____we walk and play．From the time we are born，air is around us on every side．When we sit down，it is around us．When we go to bed．air is 32 around us．We live 33 air．
All living things 34 air．Living things cannot live 35 air．We can live without any water for 36 days，but we cannot live for more 37 a few minutes without air．When we are working 38 running，we need more air．When we are asleep，we need less air
We live in air but we cannot see it．We can only feel it．We can feel it when it is 39 ． Moving air 40 wind．

【小题5】A．have B．have no C，with D．without

Air is all around us.It is around us as we talk and play, From the moment we were born , we are surrounded(围绕) by air. When we sit down ,air is also around us ,we live in air .
All living things need air:living things cann’t live without air.
We can go without food or water for a few days ,but we can not live for more than a few minutes without air. When we are working or running ,we need some air. So we breathe faster than usual. When we are asleep, we need less air.
【小题1】From the text ,we know that on the earth _____

A．there is air everywhere	B．some animals don’t need air
C．plants need more air	D．for a long time people don’t need air.

【小题2】The writer tells us that _____.

A．there is less air on the earth than on the moon.

B．the earth is covered with water

C．the earth is covered with air

D．there is no air on the earth.

【小题3】Which of the following things need air ?

【小题4】Which of the flooowing is the first important thing for people’s lives ?

【小题5】A man needs more air when he _____.

Animals, including insects, don’t have a ‘language’ like ours. They do not ‘talk’ to each other in words and sentences. But if we watch them, we can see that they do have their ways of communicating (交流) with each other.

Can you see the rabbit’s tail? When rabbits see this white tail moving up and down, they run away. They know that they are in danger. The rabbit has told them something without making a sound. It has given them a signal.

Many other animals use this kind of ‘language’. When a cobra（眼镜蛇）is angry, it raises its head and makes itself look powerful（有力的）. This warns other animals. When a bee（蜜蜂）has found food, it goes back to its home. It cannot ‘tell’ the other bees where the food is by speaking to them, but it does a little dance. This tells the bees where the food is.

Some animals ‘say’ things by making sounds. A dog barks, for example, when a stranger comes near. A cat purrs when it is pleased. Some birds make several different sounds, each with its own meaning. Sometimes we human beings speak in the same way. We make sounds like “Oh” or “Ah” when we are frightened or pleased or when we drop something on our toes.

1.Which one is TRUE according to the passage?

A．Animals have languages like human beings.

B．Bees communicate with each other by dancing.

C．Animals can use words. D．Animals are brave.

2.A rabbit uses its tail to ___________.

A．warn other rabbits when they are in danger B．tell other rabbits where food is

C．make itself look powerful D．help it to run fast

3.When a cobra is angry, it __________.

A．makes a loud noise B．raises its head

C．moves up and down D．does a little dance

4.Several different sounds can be made by a __________.

A．rabbit B．bee C．bird D．fish

5.From the passage, we know that ________ use words and sentences to express ideas and thoughts.

A．all living things B．all animals C．some birds D．human beings

综合填空根据短文大意选择方框内的单词,并用其正确的形式填入空白处,使补全后的短文意思通顺, 语法正确, 结构完整。(5分)

air, pollution, easily, good, dirty

How about modern life? Life today is much 1. . However, there are new problems. One of the biggest ones is 2. . Water pollution has made rivers 3. . It kills fish and pollutes our drinking water. Noise pollution makes us speak louder and become angry more 4. . But 5. pollution is the most serious kind of pollution. It’s bad for all living things in the world.

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