51.  A significant feature is that for many of these companies their overseas activities are more important than their domestic ones.

52.  A single bulb hung from the ceiling and some one had adorned it with a preposterously frilly white shade.

53.  A slight change of angle and a full wing shape becomes distorted into a thin one.

54.  A sterile culture because a purely hypothetical one, he wrote.

55.  A subspecies comes from Hawaii, and is probably the one pictured.

56.  A takeover was under way by the grey men and the only ones who survived it were the grey people.

57.  A third is transput instructions, requiring a field to specify one from a range of peripheral devices.

58.  A threat to any one of these is therefore perceived as threatening the others.

59.  A tiny bit inhaled by some one would be lethal.