choose the correct answer
Take computers as an example. For many of us, they still (56)________ a threat to our freedom and give us a frightening (57)________ of a future in which all decisions will be (58)________ by machines. This may be because they seem (59)________, and difficult to understand

56.       A. show                       B. meet                       C. face                         D. represent

57.       A. possibility              B. sense                       C. idea                         D. prospect

58.       A. invented                 B. changed                  C. taken                       D. done

59.       A. unsteady                 B. unsure                     C. mysterious             D. obvious
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