form the plural of the following nouns.
day, postman, sky, zero, watch, ski, radio, key, dictionary, roof, kangaroo, ox, woman, goose, leaf, sportsman, kilo, bench, bush.

days, postmen,  skies, zeros, watches, skis, radios, keys, dictionaries, roofs, kangaroos, oxen, women, geese, leaves, sportmen, kilos, benches, bushes