11.   What is disturbing is that it is typical of a new intolerance against whistle-blowers that raises serious questions about free speech.

12.   While popular, such bills raise serious questions about the proper role of government, Kyl said.

13.   There are serious questions about the credibility of these reports.

14.   The story raises serious questions about our system of justice.

15.   He made a flippant response to a serious question.

16.   These are the only places with regular air movements, though this raises serious questions about how the trees of the gymnosperm forests of the past were pollinated.

17.   Police say the episode raises serious questions about home leave for prisoners.

18.   Already there are serious questions within the organization about whether outfielder Robert Stratton, the first-round pick from last year, will develop his talent.

19.   Although many people believe that life exists on other planets, this over-the-top movie is worlds away from that serious question.

20.   Amnesty says politely that the authorities have not answered serious questions about their failure to protect civilians at the time.