81.   Two carriers were more helpful, and some cell phones, I discovered, will keep track for you.

82.   We keep track.

83.   We kept track.

84.   When he was at Enron, Skilling had a reputation as a hands-on manager, a man who kept close track of most things that were going on.

85.   White House spokesman Mike McCurry said President Clinton, traveling in Texas, was keeping close track of the nomination.

86.   Who could keep track?

87.   While players are busy dodging and shooting, the display screen keeps track of time and scoring.

88.   Without these two and others like them, the Net threatens to become an unmanageable monster, growing by leaps and bounds with no one keeping track.

89.   Yet as you parcel time in smaller amounts, you start keeping track more closely.

90.   You can keep better track of what you sell store by store.