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live on the planet Mars. Our own planet, Earth, is becoming more and more crowed and polluted. Luckily,
we can start again and build a better world on Mars. Here is what life could be like.
First of all, transport should be much better. At present, our spaceships are too slow to carry large
numbers of people to Mars-it takes months. However, by 2100, spaceship can travel at half the speed of
light. It might take us two or three days to get to Mars!
Secondly, humans need food, water and air to live. Scientists should be able to develop plants that can
be grown on Mars. These plants will produce the food and air that we need. However, can these plants
produce water for us? There is no answer now.
There is a problem for us to live on Mars. Mars pulls us much less than the Earth does. This will be
dangerous because we could easily jump too high and fly slowly away into space. To prevent this, humans
on Mars have to wear special shoes to make themselves heavier.
Life on Mars will be better than that on Earth in many ways, People will have more space. Living in a
large building with only 10 bedrooms is highly possible. Many people believe that robot will do most of our
work, so we have more time for our hobbies.
There will probably be no school on Mars. Every student will have a computer at home which is
connected to the internet. They can study, do their homework and take exams in online schools. Each student
will also have their own online teacher called "e-teacher".
However, in some ways, life on Mars may not be better than that on the earth today. Food will not be
the same-meals will probably be in the form of pills and will not be as delicious as they are today. Also,
space travel will make many people feel ill. The spaceship will travel fast but the journey to Mars will probably
be very uncomfortable.
B. on the moon
C. under the sea
D. in the sun
B. A few months
C. A few days
D. A few years
B. will study mainly in a classroom
C. will meet each other face to face every day
D. needn't study at all
B. there will be more space and less work to do
C. there will be much delicious food
D. all students don't need to do any homework
B. We need to develop a special plant which can produce water.
C. On Mars, we can jump higher than on the earth.
D. Food will be much more tasty.
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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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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. |
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 |
| 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 |
| 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 |
| 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. |