11.  Prediction is an uncertain business, but a crucial one.

12.  Schofield said the next step she took was a crucial one.

13.  So Rotary indeed did play a role, and a crucial one, to bring an end to the deadly virus.

14.  The distinction is a crucial one.

15.  The issue of materiality is a crucial one.

16.  The real crucial one is at quarterback.

17.  The technique may be a crucial one.

18.  There was no sign of a leak, but there had to be one, a crucial one.

19.  This summer was the crucial one.

20.  Washington has joined the Devils as the strongest challenger to the Flyers for the Atlantic Division title, so the game is a crucial one.