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 create a food chain (链条). 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 (链接) disappears.

All life needs sunlight to live on. But only plants can use sunlight directly. Plants are ‘factories’. They make food from sunlight, water and things in the soil (土壤) 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. Some animals feed directly on plants, others eat smaller animals. Meat-eating animals are only eating plants indirectly.

What about humans? We are members of many food chains. We eat rice, vegetables, and fruits and so on. We also eat meat and drink milk. But we often break up the food chains. We kill wild animals and also make rivers, lakes and seas polluted. When these rivers, lakes and seas are polluted, the fish in them can not be eaten. If we eat the fish, we will get strange illnesses.

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

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

2.Who often destroy the food chains?

3.Which of the following would be the best title for this passage?

It was the first day of biology class. The teacher wanted to give a good 1  to his class. He wanted to  2  his students’ eyes to the world of biology.
He knew that 3  young students was not easy, so he worked 4  and tried to find a good way to teach this class.5  thinking for a long time, he made a 6  at last. He decided to show the kids something 7  and teach them a lesson at the same time.
He asked his students to 8  carefully. Then he began. He put a worm(虫子) into a glass of water. The worm 9  around in the water. Then he put a second worm into a glass full of alcohol(酒精). It died at once. He asked the students if anyone knew about 10  they learned from it. A boy said, “You showed us that if we drink alcohol we won’t have worms.”

There are over 800 boarding (寄宿) schools in the UK with students from home and foreign countries. Boarding schools started hundreds of years ago in the country. But the earliest boarding schools were set up for white, rich boys only. Now both boys and girls can go to boarding schools from the age of 7 to 18.
What to do
In the UK, boarding schools have three terms in a school year, with about 13 weeks in each term. Students study and live together. They can’t go outside if they are not allowed to. In some schools, each student has his or her subject plan. Besides the usual classrooms and laboratories, the boarding schools have lots of other facilities for their students, including music rooms, boats, swimming pools, cinemas and theatres. Most boarding schools have a “light out” time. So when it’s time to go to bed, all the lights in the bedrooms are turned off. There are house-masters to take care of students all the time, especially after school hours.
What to wear                                                                            
Nearly all students at boarding schools wear a school uniform. Boys usually wear a shirt and a tie, and girls wear a white blouse, sometimes also a tie and a skirt. As students get older, the rules become less strict.
      ⑤      
In the UK, boarding schools provide students with delicious food. They can choose to have a full English breakfast or simply bread. They can also choose between a meal with no meat and another meal at lunch and dinner. And there is always self-service for salad (沙拉), other side dishes and a dessert. Students can also make themselves something to eat at any time in a kitchen, or drink tea or have a snack between meals.
【小题1】Which of the following is TRUE according to (根据) the passage?

It was a Saturday afternoon. Mr. Green was reading a newspaper. Suddenly he heard his wife 16    in the next room. He hurried to her and asked, "What happened to you. my dear?”

“Oh, dear!” his wife cried out, "My head hurts!   17    a doctor. Hurry up!” Their two children were both   18    at that moment and something was wrong with the telephone. Mr. Green 19    go to a hospital himself. Bad luck! All the hospitals in the town were  20  that day. Mr. Green didn't know    21   . Just then his friend, Mr. Brown, saw him and asked. "What is    22 ?"

Mr. Green told him everything. The man .said. "Why not turn to   23   ? He can help you."

Mr. Green remembered his friend, Mr. Black was a good doctor. He hurried to Mr. Black's.

When he got there, Mr. and Mr. Black were having their  24  meal . The doctor asked Mr. Green to drink with him. He was happy and sat  25 . After that they began to chat. And when Mrs. Black asked, “How is you wife?” “She is fine, thanks…” Mr. Green stopped at once — he remembered his wife was waiting for a doctor at home. ^

1.A. crying    B. laughing C. whispering      D. singing

2.A. Look for  B. Wait for C. Send for        D. Ask for

3.A. in        B. out      C. up              D. down

4.A. should    B. could    C. had to         D. was able lo

5.A. expensive B. open     C. free           D. closed

6.A. when to go  B. how to do C. where to go D. what to deal with

7.A. the matter  B. the wrong C. trouble D. problem

8.A. Mr. Brown  B. Mr. Black C. Mr. Green D. Mrs. Green

9.A. lunch      B. supper     C. morning  D. evening

10.A. in bed    B. on floor    C. at the table  D. at home