1 When did Tom's dad buy a very interesting book in a bookshop?
2 Where did Tom's dad buy a very interesting book last week?
3 Who bought a very interesting book in a bookshop last week?
4 What did Tom's dad buy in a bookshop last week?
5 Why did Tom's dad buy a book in a bookshop last week?
6 How did he buy an interesting book last week?
7 How many books did Tom's dad buy in a bookshop last week?