Использовать the past simple or present perfect чтобы 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.

1) have your offices been

2) were you

3) was

4) decided

5) have you ever regretted

6) were

7) have soon realised

8) has developed