The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements

They ________________for a year. [ ]

_______ you said at the meeting describes a brightfuture for the company

I think it is necessary for everybody to take action _______ the Earth.–I agree. Turn off the lights before we leave the classroom.

He had a wonderful childhood, _____with his mother to all corners of the world.[ ]