debundesliga1-4, Exercise 2: Clubs and national team

Model answer:

The national squads were drawn largely from Bayern and Gladbach, so players who worked together every week brought that understanding to the national team, which helped it win in 1972 and 1974. In turn, national success raised the league's profile, attendances and television interest, and made the clubs' stars well known.

Each supported the other: strong club football produced the players, and national success enlarged the audience. Details should be checked.