whereas in the past the inhabitants of one street all knew each other, nowadays people on the same floor in tower blocks even say hello to each __4__other.
Cities can be frightened places. The majority of __1__the population live in noisy massive tower blocks.
The sense of belonging to a community tends to appear __2__when you live thirty floors up in a skyscraper.
Strange __3__enough, whereas in the past the inhabitants of one street all knew each other