1. She has a 10-year-old son.
2. What an expensive house!
3. How much does Minh weigh?
4. They would prefer to live in their old house rather than move into new block.
They would rather live in their old house than move into new block.
5. Why were you absent to school last week?
6. Nobody is so intelligent as Lan in my class. 
7. My father is a quick typer.
8. Would you like me to make a cake on your birthday?
9. Because the weather was bad, the Browns had to cancel the trip to Sa Pa. 
10. You don't need to take off your shoes before entering the room.