Put the verbs into the correct tenses (Past Simple or Past Perfect)

Ex 2. Put the verbs into the correct tenses (Past Simple or Past Perfect).
1. Henry (work) _____________as a rescue worker before he (be) ____________retired in 1990.
2. By 10 a.m. yesterday, rescue workers (free) _____________ten people trapped in the collapsed
building.
3. Mr. Jack was no longer there. He (leave) _____________the school six years before.
4. The light (go off) _____________because they (not/ pay) _____________the electricity bill.
5. She (not/ escape)_____________before the walls (collapse) _____________in the earthquake?
6. Her bicycle (not/ be) _____________there because a friend (take) _____________it without
asking her.
7. He (be) _____________tired because he (not/ eat) _____________anything since the morning.
8. People already (know) _____________about the storm before it (come)_____________.
9. By the time rescue workers (come)_____________ there, 5 people (die)._____________
10. After she (finish) _____________her work, she (come) _____________back home.