Longman Express Ch.5 Sentence making

1. What could  your parent (dad/ mum) do by himself/ herself when s/he was three years old?

2. What ________________ your parents do by themselves when they _________ five years old?

3. What couldn't your parent (dad/mum) do by himself/ herself when s/he ___________ ten years old?

4. What ________________ you do when you ___________ three years old?

5. What couldn't you do when you ___________ three years old?