Je viens tout juste de travailler ça en classe, il y a surement des erreurs dans mon travail :
Jenny was waiting [...] arrived
were driving [...] happened
took [...] wasn't looking
I was walking [..] heard [...] was following [...] started
Dropped [...] was doing [...] weren't breaking
Je n'ai pas cherché particulièrement de sens, j'ai mis les verbes en fonction du nombre de case.