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(1) I am using a computer __________ a lot of time.

  for saving.

  for to save

  to save

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(2) Everybody must ____ advantages of the new technology.

  take

  to take

  taking

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(3) Computers help people _____ their jobs properly.

  for to do

  for doing

  do

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(4) We cannot _______ computers because they are expensive..

  to buy

  bought

  buy

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(5) You needn't ______ the calculations yourself. The computer can do that for you.

  to do

  do

  doing

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