1.Many astronauts said that it was to see the Earth from space. WONDER
2.Oxygen is essential for the of all plants and animals, whether they live on the land or in the water. SURVIVE
3.Astronauts who are orbiting the Earth often experience sensation of . WEIGHT
4.John Harrison is a space who wants to destroy Earth. TERROR
5.WWF is committed to saving animals such as black rhino, leatherback turtle and saola. DANGER
6.UFO, which means flying saucer, is the abbreviation for Flying Object. IDENTIFY
7.95% of the atmosphere on Mars is carbon dioxide, which is to breathe. POISON
8.NASA has found out that Kepler-62e has some to Earth. SIMILAR
9.Do you think astronauts feel a great sense of when they travel alone in space? LONELY
10.NASA scientists believe the of alien life is not that far away from Earth. EXIST