Write these nouns in the plural. In some cases two forms are possible.
A. 1 basic 2 curriculum
B. 1 ox 2 cuckoo 3 child 4 roof 5 fly 6 key 7 leaf 8 zero 9 piano 10 ski 11 woman 12 deer 13 sheep 14 mouse 16 house

A. 1. basics; 2. curriculums.B. 1. oxen; 2. cuckoos; 3. children; 4. roofs; 5. flies; 6. keys; 7. leaves; 8 zeros. 9. pianos; 10. skis; 11. women; 12. deer - не изменяется; 13. sheep - не изменяется; 14. mice; 16. houses.