41.  A back injury effectively ended his career seven years ago.

42.  A back opening fastens with buttons and a wide sash ties at the waist.

43.  A back-up power system at the coach station did operate but only lasted three hours.

44.  A background check confirmed that he had a criminal record.

45.  A backhoe dug down to the damaged culvert in the bottom while a crew assembled another culvert up on top.

46.  A backlash to atonal techno-pop or angst-ridden thrash-rock?

47.  A bad burn could mean no usable clinker and hence no pay.

48.  A bad case of sibling rivalry, it seems.

49.  A bad experience like that can dent your confidence.

50.  A bad head cold can sometimes feel like flu.