Tommy (watch) ... a film when he (hear) ... the noise.
was watching, heard
When I (walk) ... into the room, everyone (work) ... .
walked, was working
I (eat) ... that sandwich when I(see) a hungry swan
was eating,
We (play) ... tennis when John (hurt) ... his ankle.
were playing, hurt
When I (leave) ... the house, the sun (shine) ... brightly.
left, was shining
I (sit) ... in a cafe when you (call) ... .
was sitting, called
My dog (nap) ... when I (come) ... home
was napping, came
I (study) ... for the test when the ligts (go)out
was studying, went
We (wait) ... on the platform when the train (get) ... to the station.
were waiting, got
Everyone at the cafe (enjoy) ... their coffee, then the stranger (appear) ... .
was enjoying, appeared