Образуйте множественное число существительных.
a pen a class
a story
a road
a day
a cat
a bush
a desk
a table
a plate
a fox
a room
a lady
a knife
a chair
a bus
a hero
a match
a way
a house
a family
a flag
a town
a wolf
a country
a lion
a park
a play
a dictionary
a thief
a key