Matt ................ (use) the computer when the modem crashed.
was using
When I got up this morning, my father .................. (listen) to the radio in the kitchen
was listening
While he ..................... (prepare) dinner, he cut his finger.
was preparing
My friends ................ (relax) on the beach yesterday when it started to rain.
were relaxing
She ......... (break) her leg while she ..................... (ski) in the Alps.
broke / was skiing
I ......... (read) a book when you called me.
was reading
Bob ..................... (run) fast when he slipped and fell.
was running
