Read the passage and answer the questions. (根据短文内容回答下列问题)
From a plane you can see the fields, cities, mountains or rivers below. If we go into space, we will see much more of the Earth. People and man-made satellites(人造卫星) are sent up into space to look at the Earth, the stars and other planets to learn more about them.
The moon is our nearest neighbour in space. Men have visited it already. It is smaller than the Earth. Plants can't grow on the moon because there's no air or water on it. The moon hasn't its own light. It shines back 
the light of the sun. When the sun is shining on the side of the moon that faces us, it looks like a great round ball. We can't see the moon when the sun is shining on the side of the moon that doesn't face us.
In fact, the moon isn't as near as it looks. It is three hundred and eighty thousand kilometres away from the Earth. Of course we can fly to the moon in a spaceship. A spaceship flies very fast, and it flies at about eleven kilometres a second. So it only takes more than three days to get there by spaceship.
1. What can you see in space?
We can see the Earth ,_________________________
2. There are some plants on the moon, aren’t there?
____________________________________________
3. What happens when the sun is shining on the side of the moon that doesn't face us?
_______________________________________________
4. Why does the moon look bright sometimes?
Because it shines back ________________________________
5. How far is the moon away from the Earth?
It is ___________________ kilometers away from the Earth.