41.  But leaders have said the primary reason they cannot begin working on the health bill is that the Congressional Budget Office has not evaluated the various House proposals.

42.  But in these cases, we would not be combining them, and the cell matching would be the primary reason.

43.  But its expansion to a million students a year, and a larger proportion of minority students, is not the primary reason for lower scores.

44.  But South Carolinians who back his son, George W. Bush, more often than not cite his family as a primary reason.

45.  But the Board of Education, with all of its problems, is not the primary reason so many New York City schools are in such sorry shape.

46.  But the primary reason the fun had gone out of baseball for Zimmer could have been his role as dugout coach.

47.  But the primary reason for the switch had to do with Schoeneweis, who needed additional work between starts with pitching coach Bud Black.

48.  But the primary reason was that he needed more power to run the software he uses for work as a statistician.

49.  But while awards are always nice, the bottom line remains the primary reason why studios position some of their biggest films to open at Christmas.

50.  Camaraderie is the primary reason that skiers cite for joining a ski club.