81.   The federal agency is looking at why problems persisted with the ground proximity warning system.

82.   The Lakers need his scoring and athleticism, but management has made clear the club will not hesitate to release Rider if problems persist.

83.   The microphone problem persists, so some actors are still singing without amplification.

84.   The official said an elaborate system of checks and balances is in place to assure proper treatment, though problems persist.

85.   The problem will persist.

86.   The problem will likely persist for years, Keith said.

87.   The problem persisted into the afternoon in many neighborhoods, raising the prospect that the election will have to be held again.

88.   The problem will persist until new cars are much more efficient, says van Wee.

89.   The problems persist despite a roaring economy.

90.   The problems persisted, and the documents suggest that the FAA tolerated actions that made Valujet a repeat offender.