All living things on the earth need other living things to live with. Nothing lives  1 . Sometimes one living thing kills    2  . Each kind of life eats another kind of life     3   live, and together they form a food chain(食物链). Some food chains are simple, while others are not. But    4    food chains begin with the sun, and all food chains become    5   if one of the links disappears.

All life needs sunlight to live on. But only plants can use    6   directly(直接地). They make food from sunlight, water, air and so on. Animals can only use the sun’s energy    7    it has been changed into food by plants. Some animals feed directly on plants. Others eat smaller animals. Meat-eating animals are only   8 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   9     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    10   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.

1.                A．alone          B．lonely          C．together  D．happily

2.                A．other          B．the other       C．another  D．the others

3.                A．for            B．so that          C．and  D．in order to

4.                A．any            B．all             C．some D．most

5.                A．better          B．broken         C．stronger  D．nicer

6.                A．moonlight       B．laser light       C．sunlight   D．bright light

7.                A．after           B．before         C．until D．by the time

8.                A．making         B．catching        C．eating    D．feeding

9.                A．sunlight        B．animals         C．plants    D．people

10.               A．can            B．cannot         C．must  D．needn’t

根据短文内容，从A到F中选择相应的中心词。（方框中有一个选项是多余的）

A Day in Your Future Life

People used to know more or less how their children would live. Now things are always changing and we don’t even know what our own lives will be like in a few years. Let’s see what scientists tell us about the future.

1．You go to the kitchen when you get home. The foods are prepared and sent to you. You ordered them by computer an hour ago. You said for them through bank cards before they arrived. Nobody uses cash（现金） any more.

2．What’s for lunch? In the old days, you used to go to a fast food restaurant to get a hamburger and some coke. Now you use your special machine to find out which foods your body needs. Your food-machine makes you what you need.

3．After lunch, you go down the hall to your home office. Here you have everything you need to do your work, You never have to go out to work anymore.

4．Your information screen says that you’re received a message from a friend in America. Your computer can turn English into Chinese. Your friend’s face appears on the screen, and the Chinese words appear at the bottom.

5．You finish working and go back to your living room. You turn on the TV and look through the list of new movies. It’s a like having a video store in your home. How about a movie tonight?

How often one hears children wishing they were grown-ups, and old people wishing they were young again. Each age has its pleasures and its pains(痛苦), and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets(后悔).

Childhood is a time when there are few responsibilities(责任) to make life difficult. If a child has good parents, he is fed, looked after and loved, whatever he may do. It is impossible that he will ever again in his life be given so much without having to do anything in return. What’s more, life is always giving new things to the child--- things that have lost their interest for older people because they are too well-known. But a child has his pains: he is not so free to do what he wishes to do; he is repeatedly being told not do something or being punished for what he has wrongly done.

When a young man starts to earn his own living, he can no longer expect others to pay for his food, his clothes, and his room, but has to work if he wants to live comfortably. If he spends most of his time playing about in the way he used to as a child, he will go hungry. And if he breaks the laws of society(社会) as he used to break the laws of his parents, he may go to prison. If, however, he worked hard, keeps out of trouble and has good health, he can have the greatest happiness of building up for himself his own position(地位) in society.

1.What is the happiest person according to the passage?

A．A child who can do whatever he likes.

B．An old person who lives in a comfortable life.

C．A grown-up who no longer expects other to pay for him.

D．A person who never wastes his time in his whole life.

2.Which of the following is true, according to the second paragraph?

A．Life for a child is fairly easy.

B．A child is always loved whatever he does.

C．If much is given to a child, he must do something in return.

D．Only children are interested in life.

3.What is the main idea of the passage?

A．Life is not enjoyable since each age had some pains.

B．Young men can have the greatest happiness if they work hard.

C．Childhood is the most enjoyable time in one’s life.

D．One is the happiest if he can make good use of each age in his life.

4.What will the fourth paragraph most probably discuss following this passage?

A．Examples of successful young men.

B．How to build up one’s position in society.

C．Joys and pains of old people.

D．What to do when one has problems in life.