21.   For many people, Ostro said, drugs may be a more effective tool in fighting allergies.

22.   For parents, books can be effective tools for explaining morals and values.

23.   For niche brands, getting their message out is most important, and the Web is an effective tool, Ms. Schoenbart said.

24.   For the most part, the travel planners are effective tools.

25.   He considers shareware an effective marketing tool.

26.   He considers it an effective tool to distance Salon from online competitors.

27.   He threw more fastballs than usual, an effective tool once he got hitters off-balance waiting for the knuckler.

28.   He proved that an elegant jacket could be as effective a marketing tool as a garish one.

29.   Higher prices are an effective tool for matching demand and supply.

30.   His murder becomes an effective recruiting tool among disaffected Catholic youth.