We know the earth is a planet．There are seven other planets，and they go 1 the sun together．The eight planets and the sun are2 the solar system．The first planet，3 the sun，is Mercury(水星)．It is 58 miIlion 4 from the sun．Venus(金星)is the second planetfrom the sun，and 5 planet，the earth，is the third．It is from the sun,and 55 planet,the earth,is the third.It is 2,650 million kilometres from the sun．
Jupiter(木星)，Saturn(土星)，Neptune(海王星)and Uranus(天王星)are all 6 than the earth，7 Venus，Mars and Mercury are smaller than the earth．
Animals，trees and humans can only 8 on the earth，because the other planets in our solar system don't 9 air or water．Do any 10planets in solar systems have life?We don't know about it．
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A. I'd like to travel into space some day. B. Have you heard the latest news? C. How did they go there? D. You're interested in space travel, right? E. I don't agree with you. F. I think that's impossible. G. That's really the news to me. |
A: Hey, Nick!
B: Not yet. Anything special?
A: The astronauts have just come back from the moon.
B: Wow! How long did they stay on the moon?
A: For five days. They will stay longer next time.
B: Have they found life on the moon?
A: No, they haven't. I don't think there is life on the moon.
B: I think there're aliens living on the moon.
A: Maybe. But people have never seen them.
B: I think that's because they live too far from us. They don't know how to drive a spaceship.
A: Haha, that's interesting.
B: Yes, I think that is really exciting.
A: I'm sure your dream will come true.
he been back from work ?
He finished his work .
— Yes, .
— No, .
He studied hard pass the exam.
How does a rocket fly? There is gas(气体) in the rocket. When the gas inside the rocket got hot enough, it will rush out of the end of the rocket. So it can make the rocket fly up into the sky.
Rockets can fly far out into space. Rockets with men have been to the moon. Several rockets with men have flown to another planet much farther away than the moon. One day rockets may be able to go to any place in space.
根据短文内容, 补全下文。(词数不限)
The moon is about 384, 000 kilometres away from us. It is so far that a plane it. Scientists wanted to reach the moon and about it. But how could they get there? They thought hard and at last they found a could get there.
A rocket can fly because of the in it. When the gas in it got , it will rush out of the end of the rocket and make the rocket . So it can get into space. Now rockets with men the moon. We believe that one day rockets may in space.
