Select the correct article ("a" or "an") for each sentence.
1. I saw ___ apple on the table.
2. She has ___ orange in her lunchbox.
3. Tom bought ___ car last week.
4. She is reading ___ interesting book.
5. We stayed in ___ hotel near the beach.
6. They found ___ old map in the attic.
7. She needs ___ umbrella because it's raining.
8. He is wearing ___ uniform to school.
9. We saw ___ elephant at the zoo.
10. She ate ___ sandwich for lunch.