41.   But many scientists and biotechnology executives say they doubt the drug strategy will work.

42.   But most of the time, my strategy worked.

43.   But on Monday night, neither strategy worked.

44.   But Palmer said such a strategy no longer worked.

45.   But that strategy has rarely worked smoothly.

46.   But that strategy works both ways, and Democrats are playing too.

47.   But surely the West, especially the United States, can only hope that the procrastination strategy will work again.

48.   But the strategy did not work, at first.

49.   But the strategy may have worked too well.

50.   But the strategy did not work.