11.   Perhaps he had had a bad day at the garage and had not sold enough crummy second-hand cars.

12.   She had gone through bad days.

13.   The tribe still experienced occasional bad days, though these no longer threatened its very survival.

14.   They had a bad day in the office.

15.   This was a process in which I had never engaged back in the bad old days when I toiled on a typewriter.

16.   People said I choked, but I just had a bad day on the golf course.

17.   He had a bad day at the office.

18.   Everyone has good days and bad days.

19.   Her syntax is sometimes a world unto itself.