1. Local people were searching the area at midnight last night.
→  The area was being searched at midnight last night.

2. They’re cleaning the swimming pool just now.
→ The swimming pool is being cleaned just now.

3. They have interviewed ten people since Friday.
→ Ten people has been interviewed since Friday.

4. That restaurant serves the best food in town.
→ The best food in town is served by this restaurant.

5. They are providing information and help at the main desk.
→ Information and help are being provided at the main desk.