Использовать the past simple or present perfect чтоб заполнить пропуски.A: How

Использовать the past simple or present perfect чтоб заполнить пропуски.
A: How long (1)______ (your offices/ be) in this area?
B: Since April 2007.
A: Where (2) ________ (you/ be) before that?
B: In the city centre. But the rent (3) _______ (be) outrageously expensive, so we (4) _________ (decide) to relocate to the suburbs.
A: And (5) ___________ (you/ever/ regret )your decision?
B: Frankly, we (6) _________ (be) slightly worried about all the changes in the first couple of months, but we (7) _________ (soon/ realise) that it was the right move. This part of town is extremely attractive, and in fact, it (8) _________ (develop) enormously over the last two or three years.