1.The ancient Greeks _____ (call) the Sun Helios2.Look! 50 aliens _____ (come) out of the spaceship.3.Robots ______ (explore)Mars now to find information.4. William Herschel ____ (discover) Uranus in 1781.5. The astronauts _____ (leave) for the Moon tomorrow.6. The Moon ______ (travel) around the Earth almost once every month.7. It was 1969 when Neil Armstrong _____ (walk) on the Moon.8. People ______ (use) telescopes when they want to look at the planetsПожалуйста помогите!!!!​