11.   First, and hardest, by making sure that as Poland and Hungary wriggle free from the East they do not find themselves blocked off from the West.

12.   One bewildered donkey was enough to block off a street -- and that was without any help from Owen.

13.   A knife-edge or other stop at this focus blocks off some of the light.

14.   Once again she wanted to block off the part of her mind that needed to question his past life with Maria Luisa.

15.   Block her off !

16.   Never mind trying to block me off!

17.   Although some of the key streets are blocked off around the San Dieg Convention Center, taxicab operators say demand is high.

18.   Although some of the key streets are blocked off around the San Diego Convention Center, taxicab operators say demand is high.

19.   Americans also joined the war effort by partly blocking off their car headlights and complying with citywide blackouts in fear of bombing raids.

20.   And Israeli troops have blocked off dozens of roads leading into Israel with concrete barricades.