60.1 Write the plural.

1 flower - flowers 2 man - men 3 boat - boats 4 language - languages 5 watch - watches 6 country - countries 7 knife - knives 8 woman - women 9 address - addresses 10 sheep - sheep 11 tooth - teeth 12 leaf - leaves 13 child - children 14 foot - feet 15 umbrella - umbrellas 16 person - people 17 family - families 18 holiday - holidays 19 sandwich - sandwiches 20 city - cities 21 mouse - mice