21.  Every day, those prop-makers head off to work while he knocks on doors that never open and waits in vain for the phone to ring.

22.  For weeks, fliers advertising the fairs had been put up at local apartment houses, and church volunteers had knocked on doors seeking out the uninsured.

23.  Frantic, she rushed up and down hallways, knocking on doors.

24.  Garza began knocking on doors, and his friendship with Bush soon followed.

25.  He also campaigned for Gore in New Hampshire, Iowa, and New York, speaking to newspaper editorial boards and knocking on doors.

26.  He caught on quickly to the investing world and soon secured his own brokerage sales by knocking on doors.

27.  He knocked on doors, not chimneys, catching folks by surprise.

28.  He knocked on doors.

29.  He visited with patrons at the River House Cafe in Milford, knocked on doors in Concord and answered questions from undecided voters in Lebanon.

30.  He walked the streets and knocked on doors in a working-class neighborhood of modest frame houses near a steel plant and a hospital.