【题目】 What is the sky? How high is it? What color is it? What birds can live above it? These questions are difficult to answer, aren' t they? In fact, the sky has no color. Then why does the sky look blue?

We know that there is air around the world. When planes fly, they need air to lift their wings. Planes can't fly very high. That is because the air gets thinner when they go higher. The same will happen to us if we go high enough. If we go up about 1.200 kilometers from the earth, we'll find no air there. Some birds can fly into the sky as high as a plane, but they cannot fly or live without air.

Looking up above us, you will see the blue sky with white clouds. It is usually light blue. The color would be bluer when you see on the top of a high mountain. And you will see fewer clouds in the sky between you and the sun. Sometimes the sky doesn't look blue. When the sun rises and falls, you will see red, orange, and other colors in the sky. Such are the most beautiful moments of the day.

Who can see the colors of the sky high above the earth? The astronauts! They can see those beautiful colors of the sky from the outer space. However, before flying into the outer space, they sit in a spaceship high above the earth, and there is no air at all. The sky would be that dark and its color would be black.

Now you may understand that we see colors because the air scatters(使散射) the sunlight. Light travels through the air. Without air, there would be no colors.

1Planes can't fly as high as possible because .

A. the sky is blue

B. the wings are heavier

C. the air becomes thinner

D. the sky has no air

2When you stand on the top of a high mountain you will see .

A. more air

B. fewer clouds

C. more colors

D. redder skies

3In Sunning we might see many colors in the sky at about during the day in summer.

A. 700 pm

B. 11 00 pm

C. 100 am

D. 3 00 am

4The sky changes colors because .

A. the sunlight has colors

B. the air scatters the sunlight

C. it's colorful itself

D. the world Is colorful

5Which is the best title(标题)?

A. Why does the sky look blue?

B. Why can't planes fly very high?

C. Why does the sky change colors?

D. Why can the astronauts see the colors of the sky?

【题目】 John Brown, an office worker, lives in Washington. He inherited $1000000 after his parents died. He didn't feel happy at all. His college friends were looking for their first jobs, but he didn't have to. John decided to keep living a simple life like everyone else. He didn't tell any of his friends and gave $100000 of his money to a charity that helped poor children. Today he is 36 and he still wears cheap clothes and drives a small car only, but he is much happier.

So far, John has helped 15 children from poor countries all over the world, $200 a month for each. The child does not receive the money in cash(现金). The money is paid for the child's education, food, medical care and clothing. John receives a report each year on the child's progress, They can write to each other, but usually the children do not speak English.

Once John went to meet a little girl he was helping in Africa. He said that the meeting was exciting. “When I met her, I felt very happy.” he said. “ I saw that the money was used for a very good plan. It brought me closer to the child in a way that only giving money cannot. I want to do everything I can. I will go on helping those children in need.” he added.

1John is living a life.

A. poor

B. simple

C. hard

D. rich

2What does the underlined word "inherited "mean in Chinese?

A. 继承

B. 捡拾

C. 馈赠

D. 赚取

3According to the passage, which of the following is TRUE?

A. The child can receive the money in cash.

B. John only helps the poor children in Africa.

C. John has never seen the children he is helping.

D. John has helped 15 children from different countries.

4Why did John think the meeting with the little girl was very exciting?

A. Because the girl came from Africa.

B. Because the girl could speak English.

C. Because he saw the money was well used.

D. Because he thought he had given money to the girl.

5Where can you probably read this passage?

A. In a newspaper.

B. In a science report.

C. In a novel.

D. In an ad.

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