Watch the video and choose the right answer.

1.   Today we can travel from continent to continent ... .
2.   South America and ... are less than a day away from each other.
3.   Military planes travel faster than the speed of ... .
4.   Every day ... flights take place overhead.

5.   In ... about 3.7 billion people travelled by plane.
6.   Right now, around the world, ... a million people are travelling in the air.