Complete the sentences with the correct form of the verbs in brackets. Use the appropriate past tense or used to. Sometimes more than one answer is possible.

Last weekend, we 1____________ (organise) a party for our good friends who 2____________ (be) our neighbours.
They 3____________ (move) to live in a different city.
While we 4____________ (wait) for them to arrive, we 5____________ (notice) that we 6____________ (run out)
of milk. It was then when the bell rang ...