A long time ago people thought the sun went around the earth. Now we know the earth goes round the sun. It takes the earth a year to go all the way round the sun. Today men even know how far it is for the earth to go round the sun. They tell us that the earth travels over one and a half thousand kilometers a minute on its way round the sun.

The sun is really a star. It’s much bigger than the earth and it is very hot. Some people have been to the moon, but we know no one can go to the sun. It’s too hot for people to live anywhere near it. The sun is three hundred thousand times heavier than the earth and more than a million times larger.

1.Long ago people thought_____.

A. the sun circled the earth

B.the earth circled the sun

C.the earth went round the sun

D.the moon went round the sun

2.It takes_____.

A. the sun one year to go all the way round the earth

B.the earth one year to go all the way round the sun

C.the earth one month to go round the sun

D.the sun one month to go round the earth

3.In fact the earth travels _____in the space.

A. a million kilometers an hour

B.half a thousand kilometers a minute

C.very fast

D.very slowly

4.People can never live anywhere near the sun because_____.

A. the sun is too hot

B.the sun is too far

C.the sun is too big

D.spaceships can’t reach the sun

5.The earth is_____.

A. as heavy as the sun

B.much heavier than the sun

C.as light as the sun

D.much lighter than the sun

 

A long time ago people thought the sun went around the earth. Now we know the earth goes round the sun. It takes the earth a year to go all the way round the sun. Today men even know how far it is for the earth to go round the sun. They tell us that the earth travels over one and a half thousand kilometers a minute on its way round—the sun.

The sun is really a star. It's much bigger than the earth and it is very hot. Some people have been to the moon，but we know no one can go to the sun. It’s too hot for people to live any where near it. The sun is three hundred thousand times heavier than the earth and more than amillion times larger.

l. Long ago people thought________ (　)

A. the sun circled the earth

B. the earth circled the sun

C. the earth Went round the sun

D. the moon Went round the sun

2. It takes _________ (　)

A. the sun one year to go all the way round the earth

B. the earth one year to go all  the way round the sun

C. the earth one month to go round the sun

D. the sun one month to go round the earth

3. In fact the earth travels __________ in the space.(　)

A. a million kilometers an hour

B. half a thousand kilometers a minute

C. Very fast

D. very slowly

4. People can never live anywhere near the sun because________ (　)

A. the sun is too hot

B. the sun is too far

C. the sun is too big

D. spaceships can’t reach the sun

5. The earth is___________.(　)

A. as heavy as the Sun

B. much heavier than the Sun

C. as light as the sun

D. much lighter than the sun

 

When you look at the sky at night, the moon looks bigger than the stars. Actually, the moon is much smaller than the stars and the sun. It's much smaller than the earth. But the moon is much closer to us than any star. That is why it looks so big. If you hold a coin close to your eye, it looks big. If you look at it across the moon, it looks small.
The moon moves around the earth. It makes one trip in about four weeks. The moon looks flat to us. But it is a round ball, like the earth.
People once thought the moon had fire on it. They thought the fire made it bright. Now we know the moon is like a mirror. It gets its light from the sun.
Our sunlight comes from the sun, too. What is the sun? The sun is a star. The stars we can see have their own light. There are many big stars we cannot see. Their light had burned out. Others are still bright, but they are so far away that we cannot see them. The sun looks bigger and much brighter than other stars because it is the nearest of all stars. The sun and the other stars we see are very hot, but the air around us saves us from the heat of the sun.
The sun gives us light and warmth. It makes plants grow and turns leaves green. It makes life possible on our earth. It is a life giving star.
【小题1】 It takes _______ for the moon to go around the earth.

A．more than a week

B．nearly a month

C．half a year

D．more than a year

【小题2】 The moon is bright because _______.

A．there is some fire on it	B．it is near the sun, too
C．there is a big mirror on it	D．it can get light from the sun

【小题3】 The passage tells us _______.

A．the sun is not the biggest star	B．the sun is bigger than any other star
C．only the sun can shine	D．the sun is one of the farthest stars to us

【小题4】 Why do we call the sun "a life giving star"?

A．Because it gives us warmth.

B．Because there are some living things on it.

C．Because plants and animals can't live without it.

D．Because people have to live in the dark without it.

When you look at the sky at night, the moon looks bigger than the stars. Actually, the moon is much smaller than the stars and the sun. It’s much smaller than the earth. But the moon is much closer to us than any star. That is why it looks so big. If you hold a coin close to your eye, it looks big. If you look at it across the moon, it looks small.
The moon moves around the earth. It makes one trip in about four weeks. The moon looks flat to us. But it is a round ball, like the earth.
People once thought the moon had fire on it. They thought the fire made it bright. Now we know the moon is like a mirror. It gets its light from the sun.
Our sunlight comes from the sun, too. What is the sun? The sun is a star. The stars we can see have their own light. There are many big stars we cannot see. Their light had burned out. Others are still bright, but they are so far away that we cannot see them. The sun looks bigger and much brighter than other stars because it is the nearest of all stars. The sun and the other stars we see are very hot, but the air around us saves us from the heat of the sun.
The sun gives us light and warmth. It makes plants grow and turns leaves green. It makes life possible on our earth. It is a life giving star.
【小题1】 It takes _______ for the moon to go around the earth.

A．more than a week

B．nearly a month

C．half a year

D．more than a year

【小题2】 The moon is bright because _______.

A．there is some fire on it	B．it is near the sun, too
C．there is a big mirror on it	D．it can get light from the sun

【小题3】 The passage tells us _______.

A．the sun is not the biggest star	B．the sun is bigger than any other star
C．only the sun can shine	D．the sun is one of the farthest stars to us

【小题4】 Why do we call the sun "a life giving star"?

A．Because it gives us warmth.

B．Because there are some living things on it.

C．Because plants and animals can’t live without it.

D．Because people have to live in the dark without it.

阅读理解

　　Light travels at a speed (速度) which is about a million times faster than that of sound. In one second, light travels about 300,000 kilometers, but sound travels only 340 meters. You can get some idea of this difference by watching the start of a running match. If you stand quite far away from the starter (发令员), you can see smoke come from his gun before the sound reaches your ears.

　　The fast speed of light produces some strange facts. Sunlight takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays (射线) left the moon 1. 3 seconds before they reached you. The nearest star is so far away that light which you can see from it tonight started to travel to you 4 years ago at a speed of nearly 2 million kilometers every minute. The light from some of tonight's started on its journey towards you even before you were born.

　　So, if we want to be honest (诚实的), we can not say, “The stars are shining brightly tonight.” We have to say. “The stars look nice. They were shining four years ago but their light has just reached our earth.”

1．The best title of this passage is ________.

[　　]

A．Light Travels Faster Than Sound

B．Stars Are Far Away From Us

C．The Speed of Light

D．How Light Rays Travel

2．If you stand 200 meters away from a man who is lifting a gun to 

start a running match, you will find out ________.

[　　]

A．light travels a million times faster than sound

B．the smoke of the gun gets into your sight after the sound of the gun-shot

C．sound travels less fast than light

D．the sound of the gun reached you at the same time with the light of the smoke

3．Sunlight obviously (明显的) ________ than the light of the moon.

[　　]

A．has to travel a greater distance (距离)

B．moves less quickly

C．travels much more quickly

D．is less powerful

4．The scientific way of saying ``The stars are shining brightly tonight" should be ________.

[　　]

A．the stars have been shining all the time

B．the stars seen tonight will be shining four years later

C．the stars which were shining long ago but are seen tonight

D．the starlight seen tonight could be seen four years ago

5．The light of the nearest star you see tonight has been ________ for years.

[　　]