Change from the active into the passive. 1.The guide met the tourists at the station. 2. I have just read his letter.

1.The tourists were met at the station by the guide. 2. His letter has been just read. 3. An interesting subject is being discussed by our students. 4. Their work will be finished in time. 5. The article had been already translated when they were given my dictionary. 6. Will the trees have been planted by the beginning of the year? 9. A letter was being written when I came in. 10. Many wonderful discoveries have been made by Russian scientists. 11. Who the phone was answered by? 12. Whom was the prize given? 13. We were asked at the examination last year. 14. His is being questioned by the police now. 15. The work has been already done. 16. Who was America discovered by?