11.   Commentators attributed his success to an unusual combination of a forceful intellect and personal magnetism.

12.   Computer graduates are benefiting from an unusual combination of supply and demand.

13.   Experts say that bear attacks are rare, and that fatal attacks are even more uncommon, but that this incident had an unusual combination of circumstances.

14.   Flashes of lightning caused the icy glaze on trees around Houston to sparkle early Monday as the unusual combination of a thunderstorm with freezing rain was observed.

15.   Getting up and running takes minutes, but mastering the subtleties of this unusual combination of graphic design, musical notation and computer programming can take hours or days.

16.   He has a very unusual combination of size, ability and power.

17.   He could also be fearless and light on his feet, an unusual combination in a downhiller.

18.   His chamber music included sonatas and two string quartets, as well as works for unusual combinations.

19.   His nonalcoholic entry, the Virgin Lea, is a truly unusual combination of yellow pepper, tomato juice, passion-fruit juice, honey and Worcestershire sauce.

20.   Her designs, inspired by her daughter, Gracie, are based on childhood fairy tales and are noted for unusual combinations of fabrics with trims and embroidered designs.