On sunny days we can see the sun in the sky. It looks like a hot and bright plate. But it is a ball. It is much bigger and hotter than any fire. And it is much brighter than all the lights in the world.

The sun is a star but it looks much bigger and brighter than any other star. Many stars are much bigger than the sun. The sun is much nearer to us, so it looks much bigger.

At night we can see the moon and many stars. The moon is a round ball. It is much smaller than the stars. The stars are much farther away from us; so thy look much smaller than the moon. The moon has no light of its own. When the sun shines on it, it looks bright. When the moon is full. It looks very beautiful.

1.Why does the sun look bigger than any other star?

A. Because it is bigger than any other star.

B. Because it is hotter than any other star.

C. Because it is brighter than any other star.

D. Because it is nearer to us.

2. Which is the nearest to us?

A. The moon. B. The sun. C. The stars.

3.Why do the stars look smaller than the moon?

A. Because the stars are smaller than the moon.

B. Because the stars are nearer to us.

C. Because the stars are farther away from us.

D. Because the stars are bigger than the moon.

4. Why does the moon look bright?

A. Because it is bright.

B. Because it has light of its own.

C. Because the stars shine on it.

D. Because the sun shines on it.

5.Which one is not right?

A. The sun looks like a bright plate.

B. Many stars are bigger than the sun.

C. The moon is smaller than the stars.

D. The moon has light of it’s own.

The moon is a ball, too, like the sun and the earth. Sometimes it looks as round as a plate, sometimes it looks like half a plate, or like a thin slice(片) of yellow melon(瓜).But whether you can see all of it or not, the moon is always round. Part of it is dark because it is always turned away from the sun. The moon has no light of its own. Moon light is only sunlight shining on the moon.

The moon is much smaller than the sun, even smaller than the stars. As the moon is nearer to us, it looks bigger. All day the stars are in the sky, but the light from the sun is so bright that you can not see them. Stars look as tiny(极小) as pinheads(针头), but some are even bigger than the sun. The sun looks big because it is closer than the other stars. The farther away a thing is, the smaller it looks, even if(即使) it is really very big.

1.No fire on earth 　　　　 .

A. can burn a thing

B. can be seen anywhere

C. is as red as the sun

D. is bigger and hotter than the sun’s flames

2. As everyone knows 　　　　 .

A. the moon turns around the sun just as the earth goes

B. the earth moves around the sun but the moon doesn’t

C. the sun moves around the earth just as the moon does

D. the sun is always turned away from the moon

3. Why has the moon no light of its own? Because 　　　　 .

A. part of it is always turned away from the sun

B. the sunlight is shining on the moon all day

C. it is always round, like a yellow gold(金) plate

D. the article(短文) doesn’t tell us the reason

4. Why can’t we see the stars all day? Because 　　　　 .

A. they are too small to see　　　　　　　　　　　　　　   

B. they are nearer to us

C. the sun light is too bright　　　　　　　　　　　　　　  

D. they look as tiny as pinheads

5.Which of the following is the topic(主题) sentence of the last paragraph(自然段)?

A. The farther away a thing is, the smaller it looks, even if it is very big.

B. The moon is much smaller than the sun, even smaller than the stars.

C. The sun looks big because it is closer than the other stars.

D. Stars look as tiny as pinheads, but some are even bigger than the sun.