I. Complete the passage with the words from the box.

surface /survive/ frozen/ universe/ explore/ missions/ down/ might

As we explore the (1) ___________, we naturally ask, “Is there life on other planets?”
In 1976, NASA’s twin Viking landers touched (2) ___________ on Mars in an attempt to
answer a weighty question: Is there life on the Red Planet? Since then, NASA and other
space agencies have sent many more (3) ___________ to Mars. However; the answer so far
is, “We don’t know, but we’ll keep searching.” All life on Earth needs liquid water to (4)
___________. Since spacecraft haven’t found any liquid water on Mars’ (5) ___________,
scientists think that there is no life there. But what about below the surface? Spacecraft have
discovered (6) ___________ water in Mars’ polar ice caps and in clouds of ice crystals. This
means that there (7) ___________ be liquid water below the surface where it’s warmer.
NASA plans to continue to (8) ___________ Mars every two years. In future missions, we’ll
explore below the surface and search for liquid water - and life!

XI. Fill in each blank with an appropriate preposition.
1. The children were excited___________ Star Wars: The Last Jedi.
2. Yuri Gagarin was the first person to fly___________ space.
3. NASA scientists are looking___________ habitable planets.
4. Mercury is the closest planet___________ the Sun.
5. He saw aliens coming___________ of the UFO.
6. Venus is very similar___________ Earth in terms of size and surface gravity.
7. Mars is named___________ the Roman God of war.
8. If intelligent aliens exist, how could we communicate___________ them?
9. Humans will be living___________ Mars far sooner than most people think.
10. Neil Armstrong took the first steps on the moon’s surface___________ July 20, 1969.

em xin giải thích với ạ

X. Supply the correct form of the words in brackets.
John Young, NASA most___________ astronaut, flown into space six times. (experience)
2. The high concentration of carbon dioxide in the atmosphere makes it___________ to
humans. (poison)
3. ___________ have just discovered a giant, Jupiter-like planet. (astronomy)
4. The planet Mars has been___________ remotely by spacecraft. (exploration)
5. Saturn’s moon Rhea may have a___________ atmosphere that is very similar to Earth’s.
(breathe)
6. The term UFO stands for “___________ flying object”. (identify)
7. A___________ is a native inhabitant of the planet Mars. (Mars)
8. How can someone fight hunger, ___________, and radiation on Mars? (lonely)
9. That film about aliens might___________ be classified a horror film. (appropriate)
10. What___________ could you propose for humans to live in a City on the moon?
(accommodate)

em xin giải thích với ạ