21.   Cokru acknowledged that much uncertainty remained as his country struggles through a calamitous economic downturn.

22.   Construction is to begin, however, while several uncertainties remain about costs and schedules.

23.   Despite nearly a year of detective work, many uncertainties remain.

24.   Eventually, laboratory work and observations should narrow that range, many climate experts say, but uncertainty will always remain.

25.   For the other families, the uncertainties remain.

26.   Important uncertainties also remain about about the other one, here in Iowa.

27.   Much uncertainty remains about the longterm ability to maintain or increase immunity levels.

28.   Moreover, uncertainties remain because of political obstacles in Europe and Japan to enacting fundamental change.

29.   So for many analysts, short-term uncertainty remains the key question.

30.   So many uncertainties remain that members of the Canadian exhibition have disciplined themselves not to look too far ahead.