поставить глагол в подходящей форме

1)Flew
2)Switched on
3)ran, was studying
4)began, were playing
5)walked, set
6)started, was walking
7)was listening, rang
8)gone
9)founded, was cleaning
10)were eating
11)was doing, had
12)bite, screamed
13)were eating, drunk
14)saw, was waiting
15)were playing, started