Here are the completed sentences with the correct prepositions:
1. Please, turn the lights off before leaving.
2. I usually get up around nine o'clock every morning.
3. Our plane had taken off by the time we arrived at the airport!
4. The meeting was put off because the chairman had suddenly got sick the day before.
5. I’m strongly determined. I never give up things I planned to do.
6. We share the housework; I cook and my brother washes up the dishes.
7. We ran out of petrol on the highway and had to walk our motorbike home.
8. His parents worked abroad many years, so he was brought up by a nanny.
9. Why don’t you carry on with your work? You have finished almost half of it!
10. We will need to find someone to look after the baby while we are out tonight.
Let me know if you need any further assistance!