At the moment, it may be difficult to imagine, but many people believe that, by the year 2100, we will live on the planet Mars. Our own planet, Earth, is becoming more and more crowded and polluted. Luckily, we can start again and build a better world on Mars.
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 suck 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 robots 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 his 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, so the journey to Mars will probably be very uncomfortable.
1. 根据短文内容完成句子填空（每空限填一个单词）。In the first paragraph, we can know, Earth is becoming more and more
2. 根据短文内容完成句子填空（每空限填一个单词）。
In order to live on Mars, people need faster
3. 简要回答问题。
How many examples are given in the passage about the disadvantages living on Mars?
4. 把短文中画线的句子译成汉语。
5. 用完整的句子回答问题。
What’s the passage mainly about?
Hey! The people of the earth. Can you hear this radio message? Do not be afraid! We come in peace from another planet— and why not? We are your cousins. We are men, as you are. We have been here before.
You will see a huge spaceship, a few hours from now. We are flying towards the solar system (太阳系) almost as fast as this radio message. Your sun is already in sight. Our ancestors (祖先) and yours shared the sun ten million years ago. I’m sure you have forgotten your history while we have remembered ours.
Our ancestors lived on the Earth when dinosaurs were dying. Sadly, they could hardly save the beasts. Your planet was very warm then. Our ancestors believed it would make a nice home for them.
They were wrong. Though we were masters of space, we knew so little about the Earth.
For millions of summers — there were no winters in those ancient days — the Earth had rapid (飞速的) development. It took about thirty years to fly from one planet to another, so our ancestors seldom travelled in space. But they never felt lonely. They kept in touch with their relatives and friends on other planets. Three or four times every century, starships would call and bring them space news.
But two million years ago, the Earth began to change. The temperatures fell quickly. The ground was covered with snow and ice. At that time, however, our ancestors knew little about that. Those who had called the Earth their home believed there was just a strange disease spreading on the earth. The disease wouldn’t cause death to them, but it would bring much pain and do harm to men’s health.
1. The message was from the people of the earth, wasn’t it?___________________________________________________________________
2. How soon will the people on the earth see a huge spaceship?
___________________________________________________________________
3. Why did the speaker’s ancestors seldom travel in space?
___________________________________________________________________
4. How did the speaker’s ancestors keep in touch with their relatives and friends?
___________________________________________________________________
5. What happened to the earth two million years ago?
___________________________________________________________________
6. How will you feel after you hear the radio message? Why?
___________________________________________________________________
3 . Men have always wondered about the earth they live on and about the ① ______ above them.
When early men looked at the night sky, they asked themselves a lot of questions. They looked at the moon, and wondered what this strange bright object in the sky was. They did not understand why it changed its shape from night to night. They looked at the stars and planets. They also wondered why some of them changed their positions, while others did not. ② 他们也思考地球的形状。Most early people believed the earth was flat.
③ In different parts of the world, there were different ideas about the universe. The ancient Greeks were the first people to study the universe more scientifically. In the sixth century BC Pythagoras put forward the idea that the world was round. However, he could not explain why people at the bottom of the world did not fall off.
It was not until the sixteenth and seventeenth centuries that scientists found the answers to some important questions. ④ With the help of Galileo’s telescope, people could see the sky more clearly, and find the positions of the stars and planets. Finally in 1665,Isaac Newton explained to the world what gravity (重力) was and people at last understood why they did not fall off the earth.
1. 在文中①处填写一个单词，使得句意完整、上下文通顺2. 根据文章内容回答问题。
What questions did early men ask themselves when they looked at the night sky? Write down one of them.
3. 将文中②句翻译成英语。
4. 将文中③句翻译成汉语。
5. 写出文中④句的同义句，每空限填一词。
Galileo’s telescope made
4 . Here are billions of stars and planets in space. What’s the difference ______ stars _______ ( 71 ) planets ? Stars can give out heat and light, but planets cannot.
The sun is one of the stars . Some planets are balls of rock and some are balls of gas. We live on the planet Earth. The earth spins(自转）around once every day to give us day and light.( 72 ) The earth goes around once every year to give us different seasons. There are eight planets ________ (move)（73) around the sun. We call the family of the sun and its planets the solar system. Mercury( 水星 ) is the nearest to the sun, so it is very hot. It is the smallest planet. Venus(金星)is very bright and hot. It is the nearest to the earth. Mars is covered with orange-red dust and rocks, so it looks like a red star in the sky. It has seasons like the earth. Jupiter(木星) has more than 16 moons( 卫星 ) and it is the biggest and heaviest planet. Saturn(土星)has more than(74) 22 moons. The other planets such as Uranus(天王星) and Neptune( 海王星), are all very far from the sun and very cold. We need a telescope( 望远镜 ) to see them.
1. 选择恰当的短语放入文中两个空中_____.| A．Among; and | B．Of; and | C．Between; and |
3. 用所给单词的适当形式填空。
There are eight planets
4. 写出文中划线短语的同义词：
5. Why does Mars look like a red star in the sky?
5 . When we talked about the space,we know the universe means the earth, the sun, the moon, the stars and so on in space. Many of the stars are so far away that we can’t see them.
Through our geography lessons, we know the earth (1)goes around the sun, and the moon goes around the earth.
We have day and night because the earth keeps moving all the time. Just because the moon is closer to the earth than the sun, it looks much bigger than the sun.(2)The sun is bright enough to give out very strong light. The moon can’t give any light at all, but it looks quite bright, too. Why? In fact, the light from the moon comes from the sun.(3)But in fact the stars are much bigger and brighter than the moon.
(4)在宇宙中仍然有许多其他的行星。But of all these planets, only on the earth there are living things. People on the earth have studied the space all the time. They’ve sent many spaceships into the space many times. On November 3 and 14, 2011, Chinese scientists let Shenzhou Ⅷ successfully dock with(对接) the Tiangong Ⅰ twice. This is one of the greatest events in the history of China’s space.
1. 画线(1)处的汉语意思是2. Why do we have day and night?
3. 写出画线(2)处的同义句。
4. 把画线(3)处的句子译成汉语。
5. 把画线(4)处的句子译成英语。
