阅读理解。 What is the sky? Where is it? How high is it? What lies above the sky? I am sure you have often asked these questions. They are very difficult to-初中英语-魔方格

◎ 题干

阅读理解。

     What is the sky? Where is it? How high is it? What lies above the sky? I am sure you have often asked
these questions. They are very difficult to answer, aren't they?
     If someone asks you:"What color is the sky?" I think maybe you will answer"Blue". I am afraid you are
wrong. The sky has no colors. When we see blue, it is the sunlight that is shining on little bits of dust in the
air.
     Is the sky full of air? I am sure you have asked this question, too. We know that there is air all around the
earth. Planes can't fly without air. They need air to lift their wings. Planes can't fly very high because as they
go higher, the air gets thinner. If we go too high up in the sky, we find there is no air.
     Perhaps you can answer some of the questions now. What is the sky? Nothing. Where is it? It is all around
the earth. The sky is a part of space.

1. What color is the sky according to the writer?

A. Blue.
B. White.
C. Black.
D. Colorless.

2. What is in the sky?

A. It's empty.
B. It's full of air.
C. It has clouds.
D. It has rains.

3. What is the meaning of the underlined word "dust"?

A. 灰尘
B. 乌云
C. 空气
D. 雨滴

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◎ 知识点

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