Перевести в пассивный залог: 1. they will drink this coffee. 2. we have sent the parcel. 3. tom has made these mistakes. 4. she cooked a lot of dishes. 5. they have written these letters.

1. This coffee will be drunk by them.
2. The parcel has been sent by us.
3. These mistakes have been made by Tom.
4. A lot of dishes were cooked by her.
5. These letters have been written by them.