My teacher asked us about the choices we must make in the second sentence of the paragraph below.And we must analyse it and give the reason about the choice made.this is an exercise about the past tense and the past continuous.thanks

When i was young i often(went, was going) to my aunt`s house.I(was playing,played)with my cousins from morning till night.every day we (climbed, were climbing)the hills around the house and(were walking,walked)down to the sea.At midday, we always(were returning,returned) home.