31.   Although nobody knows for certain yet that vouchers work, the first signs are positive.

32.   Although the first signs of a thaw are emerging, these bonds still trade at exceptionally high yields relative to Treasury bonds with comparable maturities.

33.   America needs to recognize the deep evolutionary imperative of slacking off at the first sign of spring.

34.   Among the first signs were the huge heaps of dead mussels on the marshland edges.

35.   And although the weather was not to blame, some travelers saw it as the first sign of the change in seasons.

36.   And at the first sign of a rally in April, investors piled back into growth funds, and tech stocks surged.

37.   And at the first sign of a rally in April, investors piled back into growth funds, and technology stocks surged despite continually gloomy earnings reports.

38.   And despite the obstacles, the first modest signs of renewal are starting to emerge.

39.   And the beams in their part of the pit are straight, not twisted, the first signs of order in a place that still looks like chaos.

40.   And in April, at the first sign of a rally, investors started reversing course.