1. A meal has been prepared for you.
=> I have prepared a meal for you.
2. The book will be translated into English.
=> they will translate the book  into English.
-3. Coffee is grown in Brazil.
=> they grow coffee in Brazil
4. Those letters haven't been typed by the secretary.
=> The secretary hasn't typed those letters.
h 5. She was left a lot of money by her uncle.
=> her uncle left a lot of money for her.
6. The accident happened because the train had not been stopped in time.
=> The accident happened because they hadn't stoped the train in time.