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8. She was cleaning while he __________ (fix) their son’s bike.
9. They had left by the time she __________ (wake) up.
10. They were having fun while their friends __________ (watch) them.
11. He had already finished his homework when his friends __________ (call) him.
12. Tell Susan to be ready at 7.00 as soon as you __________ (see) her.
13. By the time dinner __________ (be) cooked, I felt really exhausted.
14. David quit his job after he __________ (find) a better one.
15. Peter waited until his parents __________ (go) out before he __________ (turn) up the volume of his CD player.
16. It makes me feel angry whenever I __________ (hear) about him.
17. The washing machine will continue making that noise until we __________ (get) someone to fix it.
18. They had carved the pumpkin by the time the guests __________ (arrive).
19. She will buy a bigger house as soon as the bank __________ (give) her the loan.
20. While she __________ (walk) down the street, a man attacked her.