11.   After a weekend when tens of thousands of refugees poured out of Kosovo, the flow slowed to barely a trickle Monday, puzzling relief officials.

12.   G-Tec officials were puzzled by the decision.

13.   G-Tec officials were puzzled by the last-minute decision.

14.   Officials have been puzzled by a sudden surge in positive tests for nandrolone, which has been available for decades and is easily detectable in standard urine controls.

15.   Officials have been puzzled by the sudden surge in positive tests for nandrolone, which has been available for decades and is easily detectable in standard urine controls.

16.   The move by the army appeared to puzzle UN officials as several major difficulties had recently been overcome.