11.  As tornadoes go, it was a tough one to catch.

12.  Because those averages include the vast majority who are confirmed quickly, the tough ones take much longer, leaving chunks of the government adrift and nominees embarrassed.

13.  Bassett is the tough one.

14.  Besides making all the routine plays, they made the tough ones.

15.  Both coaches tend to downplay the significance of the rivalry, stating that the game simply will be one of many tough ones on their schedule.

16.  A. Procter has some issues that are unique to Procter, but the environment is a tough one for household products.

17.  A tough one.

18.  A. This is a fairly tough one.

19.  Admittedly, the campaign-finance nut is a tough one to crack.

20.  All in all, the last ride will be a tough one.