Inserta cuál es el plural de las siguientes palabras

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. How many (person) study English as a second language?
2. Five (woman) opened a computer service company.
3. Even (child) enjoy learning on the Internet.
4. Most basketball players are 6 (foot) tall or more.
5. Which breed of (sheep) produces the finest wool?
6. My (tooth) are sensitive to the cold.
7. At daylight savings time, we have to change our (watch) .
8. The boys went fishing and caught 10 (fish) .
9. There are 10 (man) in the Maintenance Department.
10. The (wife) keep their (knife) on the (shelf) .