Past Perfect or Past Simple - Open the Brackets

Open the brackets: Past Perfect or Past Simple

1. The game(already begin)
2. when we(turn) on the television
3. As soon as Leslie(pay) for her shopping,
4. she(leave)
5. After I(talk) to my teacher,
6. everything(seem) easier
7. It(not snow) at the ski resort
8. until they(arrive)
9. They(just wake up)
10. when you(call) them
11. By the time I(meet) him,
12. he(already make) three films
13. After the plane(take) off,
14. the young woman(relax)
15. We(just / begin) the lesson
16. when the alarm bell(ring)
17. Tania(just/mop) the floor
18. when her son(spill) milk all over it
19. When I(come) home from
20. work(realise)
21. that I(forget) to turn off the iron