The sun is a huge, hot and bright star. It is important because without it there would be no life on the earth. The sun gives us light and heat.

All living things depend on the sun for their growth. Plants need light and heat to grow. They use the light from the sun to make food. But we human beings cannot make food by our own bodies from the sun. All the food we eat comes from plants in a food chain(链) . And the food chain starts with the sun . For example.

sun —→ potatoes —→ chips

sun —→ corn —→ hens —→ eggs

sun—→ wheat —→ bread

Animals need sunlight, too. Just like us, their food comes from plants in food chain, which begins with the sun. For example,

Sun → leaf → caterpilllar(毛虫) → bird

Sun → seaweed(海藻) → small fish → whale(鲸)

With the help of sunlight, we can see things during the day. Even when the sky is cloudy, the sunlight is very strong and it shines through the clouds. If there was no sun, it would be dark all the time.

1.The sun is a star.

A. huge, cold and bright B. huge, hot and bright C. small, warm and bright

2.What are the two main things the sun gives us?

A. Light and heat. B. Heat and eggs. C. Corn and light.

3.From the passage we learn that .

A. when the sky is cloudy, there is no sunlight at all

B. without the sun there will be no life on the earth

C. we human beings can make food by our own bodies

4.All the food we eat comes from in a food chain. And the food chain stars with the .

A. plants; earth B. plants; sun C. animals; star

5.Which is the best title (标题) for this passage?

A. Plants need heat and light to grow

B. All living things depend on the sun for their growth

C. The sun is very important

 

Having Fun “Growing” and “Stealing”?

Recently, an Internet game has become a new fashion among young office workers and students. People can “farm” on a piece of “land” and “grow”, “sell” or even “steal” “vegetables”,”flowers”, and “fruits” on the Net. They can earn some e-money and buy more “seeds” , “pets”, and even “houses”.

Joyce interviewed some young people. Here are their opinions.

Harold: I don’t quite understand why they are mad about the childish game. Maybe they are just not confident enough to face the real world.

Allan: I enjoy putting some “bugs” in my friends’ gardens and we’ve become closer because of the game. Having fun together is the most exciting thing about it.

Laura: You know, people in the city are longing for (渴望) the life in the countryside. It reduces my work pressure (压力) ; besides, it gives me the exciting experience of being a “thief ”.

Ivy: Well, it’s just a waste of time. Teenagers playing the game spend so many hours on it that they can not focus on (专注于) their study.

1.According to the passage, people can’t things in this game.

A. grow B. borrow C. steal

2.Among the people Joyce interviewed, likes the game while dislikes the game.

A. Laura; Allan B. Allan; Harold C. Ivy; Allan

3.From Laura’s words, we can guess that she is most probably .

A. a student B. a thief C. an office worker

4.Which is NOT the reason why people like the game?

A. They can have fun with friends.

B. The game can relax people and give them a new experience.

C. They are confident enough to face the real world.

5.Where can you find this passage?

A. In a newspaper.

B. In an advertisement.

C. In a science book..

 

Our factories and homes burn coal and oil. Every year we have forest fires somewhere. Many scientists believe that the climate is changing.

The earth will perhaps be warmer by about 7 degrees centigrade. At the South Pole and the North Pole, the ice will melt (融化). The sea level (海平面) will rise by about 7meters. As a result, water will cover cities like London, Tokyo and New York. Some ports and towns along the coasts will disappear under water.

Some other scientists think that the dust, smoke and pollution from coal, wood and oil fires will block out the sunrays(紫外线). Then the earth will become colder and great sheets of ice will cover Europe and North America.

When chemicals in the air mix with rain, we have acid (酸) rain. Acid rain can bring us great harm. It destroys forests and kills life in lakes and rivers.

People are beginning to see how serious the problem is. They find it important to work with nature instead of against it. They are trying to save the earth in many different ways. But one of the most important things to do is to make people understand that saving the earth is saving ourselves.

1.Some scientists believe that .

A. the earth is growing warmer

B. we can find oil in our forests

C. we have to burn down the forests every year

2.Ice at the poles will if the earth gets warmer.

A. cover cities like London and Tokyo

B. raise the sea level by 7 degrees

C. become water and make the sea level rise

3.Acid rain .

A. brings great changes in our climate

B. kills pests in lakes and forests

C. kills the fish in rivers and lakes

4.What can we learn from the third paragraph?

A. The dust together with pollution from coal, wood and oil fires will bring us more heat from the sun.

B. The sunrays will come more because of the dust and pollution from fires.

C. As a result of the dust and pollution from coal, wood and oil fires, the earth will become colder.

5.Which statement is TRUE?

A. People have come to know the importance of working with nature.

B. All the scientists agree that our earth is sure to become warmer and warmer.

C. The sea level will rise if the earth gets colder.

 

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