11.   Still, skeptics remained.

12.   The skeptics remained skeptical.

13.   The skeptics remain.

14.   The skeptics remained.

15.   To be sure, some skeptics remain.

16.   But six years after the idea last sparked passionate criticism, many skeptics remain -- indicating a United States of Europe still has a way to go.

17.   Despite much research and success, skeptics remain.

18.   Some skeptics abroad remained unconvinced that bin Laden did anything more than express pleasure at the result of the attacks.

19.   Some skeptics remain.