11.   Both should be recorded at each checkup so the doctor can keep track.

12.   Acting Inspector General James G. Huse Jr., told the Ways and Means subcommittee on Social Security that the agency needs to keep better track of union activity.

13.   After that, you needed a calculator to keep track.

14.   But as the litany grew, it got too hard to keep track.

15.   But individuals must ask every firm that calls and keep track.

16.   But it may be the least bloody way to keep the tracks that helped NASCAR grow while adding the ones that will help it prosper.

17.   But she has kept close track of him as a pro.

18.   But the kids, who keep better track of their parental visitations than the adults do, have other ideas.

19.   But that day remains a long way off, even though manufacturers are releasing so many new models it is hard to keep track.

20.   But we who have kicked the habit have our own methods of keeping track.