Spaceships of the future will be ______.

A．There will be no place the same as our Earth.
B．There will be many places, better than our Earth.
C．There will be some planets which may be suitable for our human being to live.
D．There will be a planet for man to be used as home in the near futur

A．Recently, two American astronauts have landed on Mars.
B．The surface of Mars is very hot.
C．The journey to the moon started the future exploration in space.
D．There is life in Venus.