1. A new book is going to be published by him.
2. The game haven't been started yet.
3. The window could have been broken (by them).
4. Have you been surprised (by them)?
5. Where were the taxis being taked?
6. All the documents have to be signed.
7. The stone can't be lifted by anyone.
8. Was the contract signed?
9. The board had been cleaned by the student before...
10. The books weren't returned.