31.   Already there is some uncertainty about whether this new technology will produce a wider selection or simply digital slush.

32.   Although the drug cocktails are helping tens of thousands of infected people live longer and better, there is uncertainty about their long-term safety.

33.   American officials were furious at what they saw as a breach of promise, and negotiations have stagnated, in part because of uncertainty about the political outlook.

34.   Although the House and Senate passed similar budget resolutions last month, uncertainty about the budget afflicts both Washingtons.

35.   Among the many uncertainties about abortion and breast cancer is whether any increased risk is transient.

36.   Among them is continued uncertainty about the progress of the battles in Yugoslavia, including the possibility of a ground war involving American troops.

37.   Amid the uncertainty about when anything will be built, the MTA has been trying since January to fill the Coliseum with conventions and exhibitions.

38.   And he noted that in the long term there is uncertainty about the availability of adequate subsidies to maintain affordability.

39.   And for those individuals, uncertainty about their choices can be frustrating.

40.   And he admits to some uncertainty about what the airline might be like five years from now.