I ______________ (ride) my bike when I ______________ (fall) down.
was riding / fell
Lucy ______________ (arrive) while I ______________ (dance).
arrived / was dancing
My grandpa ______________ (read) the newspaper when someone ______________ (knock) on the door.
was reading / knocked
I ______________ (watch) when I ______________ (fall) asleep.
was watching / fell
