1. The building is thought to have been built by some excellent workers.
2. Mary is said to have been seriously ill.
3. Peter is said to perform on the stage.  
4. Many people are said to be homeless after the floods.
5. The prisoner is thought to have escaped by climbing over the wall.
6. He is believed to have driven through the town at 90km an hour.
7. Two people are reported to have been seriously injured in the accident.
8. Three men are said to have been arrested after the explosion.
9. The strike is expected to begin tomorrow.
``
1. A
2. D
3. D
4. B

``

S1 + believe/think/say/report/.... + that S2 + V 
`->` S2 + is/are/am + believed/though/said/... + `[(text(to-V (believe = V)),(text(to have V3/ed (believe ≠ V)):}`