21.   Facilities often buy replacement mattresses that are too small for the bed frames, leaving a gap where patients can become trapped and asphyxiated.

22.   Gone almost three years, he broke the circle and left a gap.

23.   Icosahedrons cannot be packed together to fill a solid space leaving no gaps.

24.   Improperly installed tile roofs and windows leave gaps, which let in water to erode walls and ceilings and sometimes spawn mold.

25.   In Congress, lawmakers acknowledged Friday that the ruling leaves a gap that could benefit criminals who seek out towns where background checks are not conducted.

26.   In the cases of schizencephaly, the gene shuts off prematurely, leaving large gaps in the cortex.

27.   It involved adult rats whose spinal cords were completely severed, leaving a gap of about one-fifth of an inch.

28.   It was typed by someone who used poor punctuation and a heavy thumb on the space bar, leaving long gaps between words.

29.   Justice Antonin Scalia apparently agreed, saying Carter and Johns might have forfeited their expectation of privacy when they left gaps in the blinds.

30.   Last spring, a committee appointed by the dean found that its proliferating e-business offerings were too haphazard and were leaving some gaps.