Нужно 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.

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