21.   A significant number of shops remained open and cars moved freely here, just south of the capital, Islamabad, as they did elsewhere.

22.   According to securities experts who spoke to the Bar Association of San Francisco on Tuesday, a number of issues remain unresolved.

23.   Advertisers are proceeding with caution when it comes to Slate because the audience numbers remain relatively low.

24.   BUt a number of Republicans remain sharply critical of the NATO operation.

25.   But a growing number of investors remain skittish.

26.   But even under that explanation, a number of questions remain.

27.   But Fox, whose analysis DiIulio has cited, says that a number of signs remain ominous.

28.   But that number remains dwarfed by the volume of potential candidates.

29.   But state officials cautioned that early estimates were just guesswork, and the correct number remains unknown.

30.   But the numbers remain small.