1. Mark and Jane have been happily married for twenty years.
2. Most people argue with their parents during their adolescence.
3. He's only 15, but he expects to be treated like an adult.
4. What was the first word you said when you were an infant?
5. He retired and moved to his country house when he reached old age.
6. Bob went to the hospital to see his friend's newborn; she's just a few days old.
7. People of my generation are more familiar with computers than older people.