active into passive и passive into active

Question

Help! 
 
Active into Passive: 
l. The gardener waters the flowers once a week. 
2. We should punish him for his bad behavior. 
3. They stopped the work as they heard the signal. 
4. The cook is preparing exotic food with the help of the natives. 
5. I will have translated the report by Monday next week. 
Passive into Active: 
1. Our plane was delayed in London. 
2. The meeting must be finished by 6. 
3. She has been just chosen the best actress of the year by the UK Cinema Academy. 
4. The hall will be being decorated tomorrow from 8 till 12. 
5. Considerable damage has been caused by the fire. 
 
Помогите хотя бы с некоторыми.

Спасибо!!

Тимур Таланцев · Accepted Answer

the flowers are watered once a week(by the gardener) 
he should be punished for his bad behavior 
the work was stopped as they heard the signal 
exotic food is being prepared with the help of the natives (by the cook) 
the report will have been translated by Monday next week (by me) 
 
they delayed our plane in London 
we must finish the meeting by 6 
the UK cinema academy has just chosen her the best actress of the year 
they will be decorating the hall tomorrow from 8 till 12 
the fire has caused considerable damage