Taking away a city’s rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can’t eat or use. If we kept these things we would soon have a mountain of rubbish.

In some cities the rubbish is collected and taken outside of city to a dump (堆存處). Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used water from toilets, bathtubs and other places.

To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you’d never know that this had once been an old rubbish dump.

In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles (堆) where they slowly change into something called humus (腐殖質(zhì)), which looks like black earth. It is rich with kinds of things that feed plants and help them grow.

（ ）46.You can most probably read the passage on 　　　 .

A.an advertisement(廣告)　 B.a poster　 C.a science book　 D.a story book

（ ）47.The main idea of the passage is 　　　　 .

A. to let us know taking away rubbish is a big job

B. to explain the need for rubbish collection

C. to introduce different ways to treat rubbish

D. to tell us rubbish does great harm to human beings.

（ ）48.The underlined word “sewage” in the passage means 　　　 .

A.排污　 B.洗滌　 C.吸塵　　 D.過濾

（ ）49.According to the passage, the food parts of rubbish can be used again 　　 .

A.To feed animals　 B. to feed plants　 C. to build a house　 D. to make electricity

（ ）50.How should we deal with a used metal box according to the passage?

A. By burning it off. B. By throwing it off.

C. By reusing and recycling it. D. You can do with it at any way.

Put 2 February in your diary! It is World Wetlands Day! It marks the date that the

Convention(公約) on Wetlands was signed(簽署)in1971.This special day was first celebrated in 1997 and it is celebrated every year.

　 The celebration is a call for action. It is a way to show people how important and

useful the wetlands are for people. On World Wetlands Day, people around the world take

part in many wetlands activities. People take trips to the local wetlands. There are talks

about how important the wetlands are. People get together to clean up their local wetlands

Children draw pictures to advertise the day. People also compete(比賽)in boat races.

　 The World Wetlands Day is important! If there are no wetlands, there will be no water for anyone in the future. Wetlands help protect nature and resources(資源)like fresh water. Already, more than 10000 million people in the world do not have fresh water.

　 Many people do not know how important the wetlands are. They can understand why an

elephant or a tiger is important because they are big, beautiful animals. It is much harder for

them to understand how important the animals in the wetlands are. These small animals,

such as frogs and snails, play a very important part in keeping the balance of nature.

　 All plants and animals are part of the food chain(鏈).If the small wetlands animals

die, some animals in the food chain will have nothing to eat. They will also die. People

need the wetlands to keep the balance of nature in the world. If we do not protect nature

today，it will be gone tomorrow.

46. What should you put in your diary?

　 A. Some frogs.

　 B. The date of World Wetlands Day.

　 C. 1971

　 D. Any special day.

47. Where do people celebrate World Wetlands Day?

　 A. All over the world.　　　　　　　　　　　 B. In ships

　 C. At home.　　　　　　　　　　　　　　　 D. In their own way.

48. Which of the following sentences is NOT true?

　 A. People celebrate World Wetlands Day by taking part in competitions.

　 B. People celebrate World Wetlands Day by taking hips to local wetlands.

　 C. People celebrate World Wetlands Day by listening to talks about the wetlands.

　 D. People celebrate World Wetlands Day by talking about the weather.

49. Why are small animals important?

　 A. They are part of the balance of nature and the food chain.

　 B. They are beautiful.

　 C. Bigger animals are eaten by them

　 D. Without them, there may be no water.

50. Which of the following might be the best title of the article?

　 A. Wetlands Are Important

　 B. Small Animals Are Also Important

　 C. World Wetlands Day

　 D. Food Chain

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(食物鏈). 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

You may think there is only sand in the desert(沙漠) of the world, __41__ it is not true. In the desert, as we know, there is a little __42__, but it is not __43__ for most plants. Still we can see some plants __44__ in the desert.
    There is __45__ in some places in the desert. We __46__ these places oases(綠洲). In the oases, there are villages and towns. People grow __47__ kinds of crops in the fields there.
People __48__ live outside the oases. They have camels, sheep and other animals. These animals depend on(依靠) the desert plants __49__ their food and do not need __50__ water.
    The __51__ are useful to the desert people in many ways. They eat the meat and drink the milk of the animals. They use the camels for carrying water, food, tents and something else.
The people of the desert have to keep moving from place to place. They must always look __52__ grass or desert plants for their animals. When there is no more food for their animals, they move to __53__ place. The desert people are __54__. People in the desert would be willing __55__ the people in trouble and give them food and water.

41. A. and             B. but                   C. or                    D. so
42. A. rain            B. rains                 C. wind                D. winds
43. A. good           B. good enough     C. enough good     D. enough
44. A. live             B. to live               C. lives                 D. lived
45. A. stones         B. plants               C. wood                      D. water
46. A. say             B. tell                   C. call                  D. find
47. A. every          B. all                    C. a                      D. one
48. A. also            B. too                   C. either                      D. still
49. A. for             B. on                    C. by                    D. with

50. A. a little         B. few                  C. much                      D. any
51. A. water          B. plants               C. crops                      D. animals
52. A. at                      B. for                   C. up                    D. after
53. A. other          B. the other           C. the others         D. another
54. A. well            B. friend               C. friendly            D. carefully
55. A. help            B. helps                C. helping             D. to help