Put in the or a/an if necessary.

1)Would you like to travel in …. space? – Yes, I’d love to go to …. Moon.
2)I lay down on the ground and looked up at …. sky.
3)Peru is … country in South America.
4)How many stars are there in … sky?
5)Where is the centre of … earth?
6)There are millions of stars in … space.
7)… sun is … star.
8)Tim lives in a small village in … country.
9)… moon goes round … earth every 27 days.
10)What is the highest mountain in … world.