1.   It was true - walls were crumbling and she had better make sure that new ones were not built.

2.   Some had no floor tiles and their walls were crumbling.

3.   The castle walls were slowly crumbling away.

4.   The wall was crumbling where children had climbed over.

5.   The wall was crumbling and there were great gaps in it.

6.   After the wall crumbled, Coke set up joint ventures and built plants while Pepsi was mired in partnerships with stodgy state bureaucracies and crumbling facilities.

7.   But a brick wall will crumble when hit by a sledgehammer.

8.   But when the wall crumbles, look out below.

9.   His walls are crumbling, patched with plywood, decorated only with family pictures and a cigarette company calendar.