21.   As have many this summer who ply their trade through the friendly skies, Air Raider last night experienced its share of system glitches.

22.   A psychic plies her trade in a second-story office just a few yards from the district office of state Assemblyman Scott M. Stringer.

23.   Along the seaside promenade known as the Malecon, parading prostitutes ply their trade by day and night.

24.   Brian Stansky, manager of the T. Rowe Price Media and Telecommunications fund, plies his trade in the busiest of sectors for mergers.

25.   British executives plying their trade in this country have met with mixed results.

26.   But after six years of plying his trade as a computer consultant, the money had dried up and Carmona decided to take a gamble.

27.   But he is trying to make a living catching footballs, and, among those who ply that trade, he stands out.

28.   But pollsters, who have plied their trade only recently in Mexico, readily acknowledge it is difficult to accurately measure public opinion.

29.   But then another fellow, who plies his trade in an Italian place, nodded his head in silent assent.

30.   By then he was living in Houston and plying his trade in coffeehouses.