11.   But as Jolly has discovered, there remains great uncertainty about which other students, if any, a school can test.

12.   But some analysts warned that uncertainties remained as to whether the sale would bring more heating oil to consumers soon, because refineries were already running at capacity.

13.   But they said that uncertainties remained regarding the supply of chip sets and motherboards, the main boards of personal computers, because of the earthquake in Taiwan.

14.   But they said uncertainties remain.

15.   But the report also noted that some uncertainty remains about how natural cyclical factors influence climate change.

16.   But uncertainties remain, analysts say.

17.   But uncertainties remain, like the degree to which atmospheric turmoil created by the hot beam would weaken its punch.

18.   But the uncertainty remained, measured by wilder and wilder swings in tech stocks during the past year.

19.   But there remains some uncertainty about how the nation will react to the prospect of a Jew being a heartbeat away from the presidency.

20.   Chances are that large uncertainties will remain.