ПОМОГИТЕ ПО АНГЛ СРОЧНОООО!!! Rewrite sentences in the passive. Pay attention

ПОМОГИТЕ ПО АНГЛ СРОЧНОООО!!! Rewrite sentences in the passive. Pay attention to the use of modal verbs in passive structures. (Перепиши предложения в пассивном закладе. Обрати внимание на употребление модальных глаголов в пассивных конструкциях.)

Образец:
Children may take their toys to the class.
Childrens toys
to the class.

1. Somebody must call the police.
The police
.

2. Parents must keep medicine in a safe place.
Medicine
by parents in a safe place.

3. Mary must bring the letters today.
The letters
by Mary today.

4. We have to fix the roof as soon as possible.
The roof
as soon as possible.