Переделайте предложения в passive voice

1 A sound of violin was heard in the hall

2 He was praised for hard work by his father

3 Bob was taken for his brother

4 I was woken up at 7 o’clock by my mother

5 The envelope was found on my desk

6 This book was bought a week ago

7 The picture was painted by a great artist

8 The window was broken the other day