tự điền từ vào ô trống
The were green and they had huge heads and big eyes.
2.
The aliens came out of a , which looked like a disk.
3.
A is a vehicle used for travelling on the surface of the moon.
4.
A moon moves round a and a moves round a star.
5.
In a environment, everything floats uncontrollably.
6.
There are eight planets that move round the Sun in our .
7.
1 aliens
2 UFO
3 space buggy
4 planet/ planet
5 weightless
6 solar system
7 galaxy
8 spaceship