Помогите переделать предложения в Passive Voice.
1)We thought about our friend all time.2)The doctor will operate on him in a week.3)The teacher sent for the pupils parents.4)They looked for the newspaper everywhere.5)Nobody slept in the bed.6)The neighbour asked for the telegram.7)Everybody listened to the lecturer with great attention .8)The senior students laughed at the freshman.9)The group spoke to the headmistress yesterday.10)The young mothers looked after their babies with great care.11)Nobody lived in that old house.12)They sent for Jim and told him to prepare a report on that subject.