11.   He has also argued that the five or six Southwest executives who are candidates will work harder to prove their mettle because he has not named a successor.

12.   Having given birth twice, Wesson already had proven her mettle.

13.   He got his chance to prove his mettle when John Grahame broke an ankle.

14.   He proved his mettle at the park when the other dogs came over to sniff him where dogs tend to sniff each other.

15.   Hull has yet to prove her mettle.

16.   Idolizing her father, who was killed defending King Arthur, she now has opportunity to prove her mettle.

17.   If the growth factor proves its mettle in further tests and comes to market, it will be expensive, like other genetically engineered drugs, Stegmann said.

18.   In this frenzied atmosphere, before the numbing roar inside the Trans World Dome, the Giants unraveled as the Rams proved their mettle.

19.   Instead, he has favored can-do managers with low-key styles, many of whom have spent at least some time proving their mettle in the private sector.

20.   It was sweet revenge for Polonia, who has been eager to prove his mettle before a national audience.