1. It is uncertain whether the increase is due to more incidents or an increase in reporting.

2. Whether they will ever get approval to move to the United States is even more uncertain now.

3. It is uncertain if the high court will choose to hear the case.

4. At this point we are uncertain of the scope of the problem, he wrote.

5. It said it was uncertain if the shorter delay would also trigger such a review.

6. It remained uncertain where all of this water came from.

7. Police initially seemed uncertain about whether there was a live shooter in the school.

8. The outlook for any action in that chamber is uncertain at best.

9. Local businesses are now uncertain about their future, said local businessmen.

10. Economists are uncertain whether this is just a temporary slowdown or a new normal for the economy.

11. After seeing the truck crash into the bus, they was uncertain if there would be survivors.

12. That might lead to an uncertain future for Dell PC owners in the hands of a company new owner.

13. Australia is also dealing with an uncertain outlook for its largest trading partner.

14. Final passage of that provision had been uncertain because of the money it would cost.

15. They said they found it relaxing to play in an uncertain moment.