Exercise on past continuous

Exercise on Past Progressive

Put the verbs into the correct form (past progressive).

When I phoned my friends, they (play) monopoly.
Yesterday at six I (prepare) dinner.
The kids (play) in the garden when it suddenly began to rain.
I (practise) the guitar when he came home.
We (not / cycle) all day.
While Aaron (work) in his room, his friends (swim) in the pool.
I tried to tell them the truth but they (listen / not) .
What (you / do) yesterday?
Most of the time we (sit) in the park.

Source : http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises