Question

1. Copper is__useful metal.

Answer 1

Answer:

1. a, 2. an, 3. The, 4. A, 5. the, 6. a 7. the, 8. a, 9. a, 10. a, 11. an, 12. The, 13. The, 14. a, 15. a

Explanation:

When the next word starts with a vowel sound, it will be an. If not, it is a. When referring to a direct object, you use the.

I'm assuming this is about articles.

15 is a bit of a tricky one, but it starts with a "your" or "yer" type of sound.