Помогите, пожалуйста!!! Поставить глагол в Past Simple либо в Past Continuous

Помогите, пожалуйста!!!
Поставить глагол в Past Simple или в Past Continuous
1. I................ (lock) the frond door when the phone................(ring)
2.................William................ (talk) to anyone while he................? (walt)
3.We................(work) for the same company when we................(meet)
4.The speaker ................(say) something important while you................(not listen)
5. Liz................(lose) her glasses as she ................(run) in the park
6................. they................(go) home when you................(see) them?
7. John................(play) the quitare when I................(walk) into the room
8. When I................(leave), the boys................(listen) to music