Put the following nouns into the plural form: 19. sheep, mouse, house 20. potato, zoo, photo, 21. forget-me-not, woman driver, lady-bird, 22. life, gentleman, salmon, 23. lady, cowboy, grown-up.

19 sheep, mice, houses
20 potatoes, zoos, photos
21 forget-me - nots, women drivers, lady-birds.
22 lives, gentlemen, salmons
23 ladies, cowboys, grown-ups.

19. Sheep / Mice / Houses
20. Potatoes / Zoos / Photos
21. Forget-me-nots / Women drivers / Lady-birds
22. Lives / Gentlemen / Salmons
23. Ladies / Cowboys / Grown-ups