21.   GOP leaders hope to attract enough support for the measure to prevent passage of legislation patterned after the bill pending in the Senate.

22.   Hurriyet said Turkey was also considering closing the Bosporus strait to prevent the passage of Russian ships carrying the missiles to Cyprus.

23.   House GOP leaders hope to attract enough support for the measure to prevent passage of legislation patterned after the pending Senate bill.

24.   Most GOP leaders oppose the measure, and have maneuvered to prevent its passage in recent years.

25.   She did not elaborate, but aid convoys often are caught in a bureaucratic tangle designed to prevent their passage.

26.   She did not elaborate, but aid convoys often are caught in a bureaucratic tangle deliberately designed to prevent their passage.

27.   The stalemate has blocked legislation and prevented passage of a budget for two consecutive years.

28.   The standoff has frozen legislation and prevented passage of a government budget for two consecutive years.

29.   The standoff has frozen legislation and prevented passage of a budget for two consecutive years.

30.   This time, unlike two years ago, the Senate already has passed the measure, and the House GOP leadership has redoubled its efforts to prevent passage.