21.   She had a severe attack of asthma and it took an hour to recover her breath.

22.   The storage room had all been deranged by the earthquake, and it took hours to sort out things.

23.   The fight takes hours, because the system keeps crashing.

24.   A manually-drawn version of the same map would take many hours to produce.

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

26.   However fast the army was marching, the Forteviot men would take an hour to reach them, and another hour to come back.

27.   Equilibration in each mixture usually takes a few hours.

28.   With the old method it would take you hours looking through files, but with the computer you just push a button and it tells you right away.

29.   I knew several wrinklies who took hours to find their glasses when it came to signing a cheque but who could see a net curtain twitch three streets away.

30.   Since the Validation program may take several hours to run, it is recommended that it is run overnight in batch mode.