11.   On a sunny autumn afternoon, the grassy park became a bazaar of causes.

12.   Since this neighborhood park became a national focal point, it has received visits from Vice President Al Gore, the duchess of York and Martin Luther King III.

13.   The McDowell park has become a favorite of winter visitors.

14.   The park became a potholed street full of ugly civic buildings and cheap hotels, bisected by busy railroad tracks.

15.   The park became a model for many subsequent efforts to draw university researchers into private businesses, thus spurring the growth of new technologies.

16.   The park has become a major destination for snowmobilers, who come by the thousands to take in the winter scenery.

17.   The park is now becoming even more popular with rock climbers.

18.   The sidewalks and the water system fell into disrepair and the park became a muted echo of laughter past.

19.   This expansion came just in time, because this park is becoming very popular, particularly with rock climbers.

20.   In recent decades, the park has become an ideological battleground.