11. We __________________on the computer when the fire ___________out. ( work / break)

12. When it ____________to rain, they ______________through the forest. ( start / walk)

13. The thief ___________my purse while I _____________at the shop window.(steal, look) 14. While they ___________football, the lights in the stadium ____________out. (play / go)

15. While Tom ___________a bath, the bell ______________. ( take / ring)

16. He ___________while we ____________dinner. (come / have)

17. Tom ____________a serious accident while ______________at the bus stop. ( see / stand)

18. The teacher _________one of the main ideas while he ___________the lesson. ( forget / explain)

19. While George and John __________their room, she ____________the ironing. (clean / do)

20. She _________while we ____________dinner. (sing / cook)

help mình vs :<