Переделайте следующие предложения в Passive Voice.
1. The speaker stressed the importance of the Congress.
2. This actor will play the part of Hamlet.
3. The director himself answered the phone.
5. Somebody recommended me to see that doctor.
6. They had eaten all the dinner before they finished the conversation.
7. Somebody has locked the box and I can not open it.
8. Our friends are making special preparations.