2 - was driving; remembered. Driving to work was the longer action.
3 - was cooking; came. Cooking dinner was the longer action.
4 - heard; was sitting. Sitting in the garden was the longer action.
5 - was typing; arrived. Typing a letter was the longer action.
6 - was digging; found. Digging in the garden was the longer action.
7 - was riding; noticed. Riding a bicycle was the longer action.
8 - was doing; rang. Doing homework was the longer action.