Hello!
1. Kate has been talking to THE customer who has just come into THE shop.
2. John uses THE Internet a lot.
3. You won't like that restaurant. THE food isn't very good there.
4. Well Mary, here's THE first question and it's AN easy one.
5. Jerry works in AN office in THE centre of London.
6. Jamaica is AN island in THE Caribbean Sea.
7. He chose THE school that has THE best teachers.
8. I saw AN interesting documentary on TV THE other day.
9. I like coffee but I don't like THE coffee they make at THE office.
10. She's looking for work but at THE moment she doesn't have any hope of getting A job.
Good luck!