"Used to" 2

I used to live in Madrid, and I was used to breathing in smoke from cars and hearing a lot of noise.

Now I live outside of Madrid, and I don’t understand how I could get have gotten used to that life?

Now my life is more quiet, but sometimes, I miss the life in the great big city.

Now I live out of Madrid and I don’t understand how I could get used to that life.?

Now I live out outside of Madrid and I don’t understand, how I could get used to that life? How could I have gotten used to that life?

I used to live in Madrid and where I was used to breathing smoke from cars and hearing a lot of noise.

Now I live outside of Madrid and I don’t understand how I could have gotten get used to that life.?

Now my life is more quiet, but, sometimes, I miss the life in the great city.

I used to live in Madrid and I was used to breathing the smoke from cars and hearing a lot of noise.

Now I live outside of Madrid and I don’t understand how I could get used have endured to that life?

This changes your meaning a little but is perhaps closer to what you wanted to say.