Образуйте множественное число следующих существительных. 1) radio, lesson, court, thief, potato, house, eye, fish, tooth-brush,

1) radios, lessons, courts, thieves, potatoes, houses, eyes, fish, tooth-brushes, roses, stories, truths, keys, mice; 2) children, paths, heroes, days, book-cases, oaks, manners, lice, studies, geese, wolves, yards, brushes, sofas; 3) men, horses, ideas, kilos, teeth, brothers, cousins, glasses, daisies, oxen, swine, grass, lions, writing-tables; 4) sons-in-law, youths, pianos, halves, dreams, feet, deer, children, materials, mice, servants, potatoes, cow-boys; 5) women, hooves, branches, mosquitoes, oxen, frogs, mouths, hills, roots, photos, feet, countries, joints, nouns.