I. Point out the articles in the following example. Tell which are definite and which are indefinite.

1. the hat
2. a book
3. a knife
4. a box
5. an heir
6. an ox
7. a plough
8. an industrious woman
9. an honest man
10. a good citizen
11. a huge round stone
12. the enemy
13. the union
14. the ewe
15. a university