Here are the best answers for each of the questions based on the passage provided:

54. It's a long time since he last returned to his home town.
- **B. He didn't come back to his home town for a long time.**

55. Sarah is responsible for watering the trees and flowers in the garden.
- **A. Sarah takes care of the trees and flowers in the garden.**

56. They haven't decided when they should organize the event.
- **D. They haven't decided when to organize the event.**

57. Skilled local artisans are teaching the craft to the young generation of the village.
- **B. Skilled local artisans are passing down the craft to the young generation of the village.**

58. After getting lost, Amanda asked a local person where to find a police officer.
- **A. After getting lost, Amanda asked a local person where she could find a police officer.**

If you have more questions or need further assistance, feel free to ask!