31.  To take the class, you have to be able to use a computer.

32.  Traditionally, one powerful computer is used as a dedicated server using all its power and memory to run the network.

33.  Whether the class moved to a special room in order to use the computer.

34.  Before learned how to use a computer, would fumble about hying to work out which buttons to push.

35.  I mostly use my computer for word processing.

36.  Anyone can use a computer.

37.  No-one could use the computer unless they had a password.

38.  They used a computer to plot the movements of everyone in the building.

39.  He wanted to use computers to automate the process.

40.  They use the computer to catalog books.