ОЧЕНЬ СРОЧНО! Трансформируйте: Active Voice ⇒ Passive Voice. Сделайте то что в [...] подлежащим.

Somebody helped [the blind man] across the road.
Children keep [cats and dogs] as pets.
Harry has just put [a stamp] on the envelope.
I was writing [a letter] the whole morning.
He will do [this work] next week.

1) The blind man was helped across the road by somebody.2) Cats and dogs are kept as pets by children.3) A stamp has just been put on the envelope by Harry.4) A letter was being written the whole morning by me.5) This work will be done next week by him.