Match each of these 3rd declension nouns with its correct gender. A brightly colored line will appear if you are correct. Since there are three choices for each, you may have to move the nouns around to see the line. Masculine Gender
mercātor
lapis
pōns
Feminine Gender
ars
mōlēs
lībertās
Neuter Gender
onus
pulvis
nōmen
Common (Masc. or Fem.)
bōs
coniūnx
hospes