III. COMPLETE EACH SENTENCE WITH A SUITABLE WORD.
1. Trang asked......... people would live on Mars in the next 20 year.
2. ............ is named after the Roman God of the sea.
3. Earth is the only....... in the solar system that has life.
4. Astronaus used moon........... to travle on the surface of the moon.
5. NASA ......... for national Aeronautics and Space Administration.
6.Vostok 1 was the first.......... to carry a human, Yuri A. Gagarin, into space.
7. He wanted to know......... humans couldn't live on Mecury or Venus.
8. What ........... you do if we found aliens?
9. You won't be able to breathe on the moon......... oxygen tanks.
10. Asteroids, also knows as "minor planets" , are numerous in the........ space.