41.   But not all experienced teachers improved enough when offered the chance.

42.   But McCollum demurred when offered the chance to say that the president was out for revenge.

43.   But some parents on the trip said it might offer the chance for a dramatic shake-up of the district.

44.   But the larger picture, most arms control analysts agree, does not offer much chance of a significant deal.

45.   But this World Cup offers a chance for both sides to become better acquainted.

46.   But they also offer a chance to be generous, to excel and to rework the past into acceptable memories.

47.   But they also offer a chance to see the beach in a new way.

48.   But throughout the United States, only a few programs offer that chance, and they are mostly for pregnant inmates.

49.   But the Raiders are famous for offering second chances, third chances, last chances.

50.   By TOM NINKOVICH Family reunions offer a chance to strengthen family ties that have frayed in our increasingly fragmented and mobile society.