We had no sooner got to know our neighbors than they moved away.

A. Sooner after we got to know our new neighbors, we stopped having contact with them. 

B. If our new neighbors had stayed longer, we would have got to know them better. 

C. Once we had got used to our new neighbors, they moved somewhere else. 

D. Hardly had we become acquainted with our new neighbors when they went somewhere else to live.