Переделайте предложение в страдательный залог. 1. the gangsters killed him yesterday morning 2. she hasn't made the dinner yet 3. we should buy a new stove 4. i water the flowers every day 5. a postman has delivered an insured letter

1. He was killed by the gangsters yesterday morning.
2. The dinner has not been made yet.
3. A new stove should be bought.
4. The flowers are watered every day. 
5. An insured letter has been delivered by a postman.