When we _____ building the house, we'll plan the garden.
  A) have finished
  B) had finished
  C) finished
  D) have been finished

  We should limit our exposure to the sun _____ protect ourselves from skin cancer.
   A) so
   B) to
   C) in order that
   D) so to

  The people next door disappeared six months ago. They _____ since then.
  A) have not been seen
  B) had not been seen
  C) will not be seen
  D) have not seen

  "Where did you see Mehdi?"
  "I saw him_____ to the park."
  A) to walk
  B) to walking
  C) walked
  D) walking

  I saw a stranger _____ out of the house as soon as the door opened.
  A) going
  B) to go
  C) was going
  D) went

  Please turn down the radio _____ disturb anybody.
  A) for you not to
  B) so that not to
  C) in order to not
  D) so as not to

  You have to prepare yourself for the Interview in which you _____ a number of unexpected questions.
  A) must have asked
  B) might be asked
  C) have to be asked
  D) should have asked

  _____ they were waiting for a taxi, Rod offered to give them a lift.
   A) Since
   B) Whether
   C) As
   D) Or

  "What is he doing?"
  "I can't understand _____ doing."
  A) that what he is
  B) that what is he
  C) what he is
  D) what is he

  All the workers were against _____ the factory.
   A) to close
   B) closed
   C) closing
   D) close