1. Your parents' house is still in Nha Trang, isn't it?
Your parents still live in Nha Trang, don't they?
2. It takes my brother three hours to surf the net every night.
My brother spends three hours surfing the net every night.
3. You'd better put your money in the bank, Jack.
I advised Jack to put his money in the bank.
4. 'Do you like watching documentary?' he said to me.
He asked if I liked watching documentary.
5. Driving a big car was a new and difficult experience.
I wasn't used to driving a big car.
6. Do you find it difficult to understand him?
Do you have difficulty (in) understanding him?
7. I don't know how to design a website.
I wish I knew how to design a website.
8. 'Laura! Don't touch the electric wires!'
Mike warned Laura not to touch the electric wires.
9. My mother never allows me to go out alone at night.
My mother never lets me go out alone at night.
10. People should use bicycles for short journeys.
Bicycles should be used for short journeys.