1: The town hall was badly damaged by the fire

2: Their garage has to be repaired 

3: A documentary about 7 floors is going to be shown us the the teacher

4: The flood victims haven't found by the police yet

5: Many people are said to be homeless after the floods

1/ The fire badly damaged the town hall.
=> The town hall was badly damaged by the fire.

2.They have to repair their garage

=> Their garage has to be repaired by them

3.The teacher is going to show us a documentary about severe floors

=> A documentary about severe floors is going to be shown by the teacher

4.The police haven't found the flood victims yet
=> The flood victims haven't been found by the police yet.

5.It is sad that many people are homeless after the floor

=> Many people are said to be homeless after the floods