31.   Spent an hour on the phone prattling on about nothing in particular.

32.   She could discourse for hours on almost any subject.

33.   The holy monk spent many hours on his knees in prayer.

34.   Standing in high heels inevitably hurts after an hour on foot.This results in aches and pains.

35.   Nora said she could sometimes forget their predicament for an hour on end.

36.   Both geometric correction and image registration involve lengthy and time-consuming operations, taking several hours on a minicomputer.

37.   Another common form of torture at the Compound involves forcing the detainee to stand for hours on one leg, the other being tied to a door handle.

38.   Fifty miles an hour on a bike?

39.   But in fact most of the vehicles travel at fifty or sixty miles an hour on this crossing.

40.   The jewellery tycoon Gerald Ratner has been banned from driving for three weeks for doing more than a hundred miles an hour on the motorway.