предложения как-то некорректно составлены. вы уверены, что все правильно напечатали?
да это задание на complex subject
просто, серьезно, нельзя сказать he is tought, they were said или they were believed, и во многих предложених напрочь отсутствует смыл при переводе.
может, сможете отправить фото с источника? ну само задание
вот фото
1. He is thought (to have been) a very good singer. 2. They are expected (to send) a reply today. 3. They are said (to have mooved) to a new flat. 4. Who is supposed (to sign) the letter? 5. The doctor is supposed (to have prescribed) you something. 6. The results of the experiment are believed (to have been) very good. 7. The new instrument is expected (to help) scientists solve many important problems. 8. The members of the committee are understood (to have come) to an agreement. 9. He is said (to have offered) them his services. 10. In the 19th century the dark areas on the Mars were thought (to be) seas. 11. We were supposed (to spend) the day on board of the ship. 12. The seamen were not supposed (to get) ashore that day. 13. The expedition is said (to have made) a very important discovery. 14. They were expected (to walk) 300 miles that day. 15. She is known (to have been interested) in the subject. 16. They were heard (to have agreed) to do it. 17. The ship is expected (to arrive) here on Tuesday. 18. They are supposed (to have haunted) him. 19. They were believed (to know) the secret all the time.
Спасибо большое!!!