Fiona doesn't know how to spell the plural of these words. Can you help her?

1) a video --- 2) a zoo ---- 3) a tooth ---

4) a deer --- 5) a potato --- 6) a fish ---

7) a woman --- 8) mouse --- 9) a roof ---

10) a hero --- 11) a dodo --- 12) a leaf ---

13) a ski --- 14) a comedy--- 15)box