Complete the sentences with the words or phrases in the box. uncontrollably universe astronaut habitable Solar System gravity flying saucer space buggies aliens humans 1. NASA stopped sending _____________ to the Moon in 1972. 2. Mars is the most habitable planet in our _______________ besides Earth. 3. He was so drunk that he drove his car________________. 4. Astronauts float around in space because there is no _____________in space. 5. A UFO is sometimes called a _________________. 6. An ______________ is a person who is trained for travelling and working in space. 7. Earth is the only planet known to be ____________ to life. 8. If intelligent ____________ exist, how would we communicate with them? 9. Some people believe that the ______________ was created by a big explosion. 10. American spacemen used ______________ to explore on the surface of the Moon. mng giúp mik vs ạ, mik cần gấp ạ