31.   But there are some shadows on that bright outlook, even the most optimistic business executives acknowledge.

32.   But trade restrictions and new competitors have made selling bananas a tough business, and company executives acknowledged that they can make improvements.

33.   But those executives now acknowledge that they can no longer afford to boast about futuristic services without delivering them first.

34.   Cable executives acknowledged that their reputation is somewhat tarnished.

35.   Cellular telephone industry executives acknowledged the flaw in GSM but said it actually reinforced their claims about the security of digital telephones.

36.   Cellular-industry executives acknowledge that digital phones are an evolving technology and say they are remedying the defects.

37.   Cable executives acknowledge customer animosity.

38.   Columbia executives acknowledged pushing to conclude the training quickly, but said this could be positive.

39.   Company executives acknowledge their buildings have intensive security systems, but they decline to discuss particulars.

40.   Company executives acknowledged Tuesday that politics may play a role in the current delay.