1. It's Dan Brown's "Origin"
2. It's popular among people of all ages
3. Children enjoy playing active games at the age of three
4. No, because they're free to do that, it's normal
5. I can tell them if they are too noisy
6. I'm good at basketball
7. Yes, I am, because languages are my hobby
8. Your memory is not full of terabytes of information yet, so it's possible to put new words and grammar rules into your mind
9. I usually ask my friend to help me