Образуйте множественное числосуществительных.

a pen — pens, a class — classes, a story — stories, a road — road, a day — days, a cat — cats, a bush — bushes, a desk — desks, a table — tables, a plate — plates, a fox — foxes, a room- rooms, a lady — ladies, a knife — knives, a chair — chairs, a bus — buses, a hero -heroes, a match — matches, a way — ways,a house — houses,a family — families, a flag- flags, a town- towns, a wolf — wolves, a country- countries, a lion — lions, a park — parks, a play- plays, a dictionary — dictionaries, a thief — thieves, a key — keys.