Complete the sentences with the best option: A, B or C.

1) The ______ is bigger than a galaxy.
A. solar system
B. universe
C. globe
2) You cannot leave the spacecraft without a ______ on.
A. space suit
B. space junk
C. space probe
3) Astronauts experience ______ when they travel in space.
A. rocket fuel
B. weightlessness
C. aliens