Question

we worked/had been working in the city for ten years before we moved to the village​

Answer 1

We had been working in the city for ten years before we moved to the village.

Hope it helps  : )

Answer 2

Answer:

we had been working in the city for ten years before we moved to the village .

probably this can be the answer but I dont know .

Explanation:

because we are talking the past but we are using pas perfect continuous tense in it . but I am confused that there is no since or for . as the rule of past perfect continuous is .

S+ HAD BEEN + V¹ + SINCE /FOR + O