1. /z/ : rooms , dogs, beds, tables, chairs, televisions, pictures, fridges, cookers, vases, windows, photos, attics, villas, walls, shelves.

2. /iz/ : houses, boxes, dishes, vases, wishes, sandwiches, classes

3. /s/ : lamps, toilets, apartments, books, baths, chopsticks, lights, parents, clothes, plants, tablecloths, tourists.

/z/:  apartments, books, chopticks, lights, parents, plants, tourists.

/s/: lamps, toilets, boxes, dishes, fridges, vases, photos, clothes, wishes, sandwiches, tablecloths, classes.

/iz/: rooms, dogs, houses, beds, tables, chairs, televisons, pictures, baths, cookers, windows, attics, villas, walls, shelves.