21.   Many online students sit at computers for hours at a time during evenings and on weekends in order to complete their assignments.

22.   The consumption of luxuries required long hours at work.

23.   I am fifteen I have just come down here in my lunch hour at school but I am having a good time.

24.   The mission begins in the early hours at RAF Lyneham.

25.   Routine maintenance work is often carried out in the early hours at the centre when workmen can avoid causing disruption to shoppers.

26.   Typically the fisherman is a lone black smudge hunched on his bait-box for hours at a time.

27.   Previously he had to spend an hour at a transit warehouse near Lyons waiting for clearance.

28.   He decided to spend the last hour at the local pub.

29.   Also, Hans and Franz, work out all you want in the morning, but take it easy after putting in hard hours at the gym.

30.   An hour at the gym.