21.   Minuscule and devoid of electric charge, though, they pass unnoticed.

22.   Not a quiet dying that might pass unnoticed in the hallways of the Galaxy.

23.   Often it passes unnoticed.

24.   Oxygen levels in the cabin may have dipped so gradually, Miller speculated, the change could have passed unnoticed by the pilots and passengers until they lost consciousness.

25.   Such humdrum events would ordinarily pass unnoticed in the hurly-burly of New York.

26.   The difference in their ages, she feels, would have passed unnoticed had their genders been reversed.

27.   The event did not pass unnoticed.

28.   The fortunes being made in Japan did not pass unnoticed at Disney headquarters.

29.   The moment passed unnoticed.

30.   The murder of Heather Rich passed completely unnoticed in the big city.