Mars is ............... than Earth. (small / smaller / smallest)
smaller
Mars has a .......... . (violin / volcano / violet)
volcano
........ is the month named after Mars. (June / May / March)
March
Mars has the ............... mountain
in the solar system. (tall / taller / tallest)
tallest
Astronauts have never .......... on Mars. (landed / land / landing)
landed
Mars has two ........ . (moon / moons / noon)
moons
There are clouds ....... Mars. (on / in / at)
on
Mars is the ........... planet from the sun. (four / fourth / for)
fourth
It ........... on Mars. (snows / snow / snowy)
snows
The asteroid belt is ............ Mars and Jupiter. (middle / between / about)
between
