11.   Some critics doubt that Kadyrov will be able to establish his authority in Chechnya.

12.   Suspicious critics doubt the brokers are smart enough to profit from risky trades year after year without ever going into the red.

13.   The ceremony, which many critics had doubted would ever take place, marks a milestone in opening up North Korea to the outside world.

14.   But critics doubt whether the law can be enforced, since as a rule such Web pages are stored on computers outside Germany.

15.   Critics doubt it will do much good.

16.   Critics doubt more flexible teaching methods would do any better at engaging students as long as exams hang over their heads.

17.   Critics doubt the Cambodian courts have the competence and independence to pursue the cases.

18.   Critics also doubt the multibillion-dollar project can succeed.

19.   Critics doubt his sincerity.

20.   However, critics doubt they will aggressively pursue the former president.