Recognise that a preposition placed in front of a noun group can show where, when, eg 'on the box' (where), 'before my birthday' (when)

1. Unsolved Mysteries- Identify adverb
2. Unsolved Mysteries- Identify adverb
3. Unsolved Mysteries- Identify adverb
4. Unsolved Mysteries- Identify adverb
5. Unsolved Mysteries- Identify adverb (1)
6. Unsolved Mysteries- Identify adverb (1)
7. Unsolved Mysteries- Identify adverb (1)
8. Unsolved Mysteries- Identify adverb (1)