Напишите последующие сущ. во мн. чPlace, library, dress, fly, watch, clock,

a) Places, libraries, languages, dresses, flies, watches, clocks, countries, eyes, buses, bushes, parties, rays, thieves, companies, Negroes, masses, leaves, wolves, glasses, keys, boxes, halves, lives, days, plays, factories, cities, opportunities, colonies, roofs, months, journeys, shelves, heroes;

b) men, women, teeth, feet, geese, children, mice, oxen;

c) postmen, sons-in-law, editors-in-chief, fishermen, schoolgirls, sisters-in-law, text-books, pocket- knives, passers-by, statesmen.