1.The house is on fire.
2.What should you do to keep yourself safe?/ What should you do for your own safety?
3.He turned off the light and went to sleep.
4.He went to bed at ten every day.
5.It took the fire fighters six hours to put out the fire.
6.Put it out.
7.All of a sudden,he found that his diary book dropped on the floor.
8.It's important (necessary) for us to keep ourselves out of danger.