Use of English PRO

At 7.30 on a weekday morning, Tokyo’s rush hour is at its peak. (0) COUNTLESS commuters pour into the world’s largest city, via an (1) ............ (EXTEND) network of bullet and overground trains, all of which operate with impeccable (2) ............ (RELY). As the trains pull into the station and the doors slide open, more and more workers force themselves on board. To do this, they need the (3) ............ (ASSIST) of the white-gloved ‘pushers’ who are employed to (4) ............ (SURE) that people get to work on time. This morning ritual is the downside of the rapid (5) ............ (GROW) in Tokyo’s population. Seats have been removed from trains in an attempt to find a (6) ............ (SOLVE) to solve the problem, but this has not been a popular move with some people, who complain about even more people being crammed into the same limited space, A new subway system, which takes a (7) ............ (CIRCLE) route around the city, has helped a little but, until more is done to ease (8) ............ (CROWD), it seems that commuters will just have to grin and bear it.