Fill in the blank with ONE suitable word to complete the following passage
explore - telescope - astronaut - Earth - Mars - spaceships - solar system - planets - gravity - astronomer
1, Some people believe that there might be alien life on ...
2, Last year, I got a ... as a birthday present. Now I look at the stars every night.
3, Our ... has eight planets.
4, I don't live on the moon. I live on ...
5, ... makes things fall down.
6, When I was a kid, I wanted to grow up and be an ... and travel in space.
7, Why do people want to ... space? Why do they want to find out what is out there?
8, Galileo Galilei was a famous ... who used a telescope to study the night sky 400 years ago.
9, Perhaps humans will travel in ... to other solar systems and planets in the future.
10, Astronomers have discovered hundreds of other ... that orbit other suns.
1. spaceships
2. telescope
3. solar system
4. Earth
5.gravity
6. astronaut
7. explore
8.astronomer
9. Mars
10. planets
