1.How can we get to the bus station?
They'd like to know how to get to the bus station.
2.What do you do with the old books
Can you tell me what you did with the old books
3.Does Tom work hard at school
Tom's father asked whether Tom worked hard at school
4.Who can work out the math problem?
Mrs Li asked who could work out the math problem
5.When did he buy this computer?
Do you know when he bought this computer?