21.   And several downtown streets will be blocked off during some of the busiest shopping days of the year.

22.   And the new filter will still block off pornographic sites, Martucci said.

23.   As soldiers in armored trucks blocked off the street leading to the central mosque here to non-Muslims, thousands of faithful arrived for Friday prayers.

24.   At least a dozen ambulances blocked off Memorial Drive, and hundreds of onlookers lined the road to watch the frantic rescue effort.

25.   At one bash, in which a section of downtown Fort Lauderdale was blocked off, I waited in line for a serving of grilled alligator.

26.   At the same time, they try to isolate the back side of the defense to block off pursuit.

27.   Barricades hauled out in case streets needed to be blocked off sat unused on street corners.

28.   Authorities occasionally closed freeway off-ramps during the demonstrations and blocked off streets, but traffic resumed shortly after each wave of demonstrators cleared out.

29.   Beijing has also stepped up security at diplomatic compounds, running barbed wire along walls, blocking off streets and adding perimeter fences.

30.   Beginning this summer, volunteers will flag the correct route and block off false paths to keep erosion to a minimum.