Study

certainty in past

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  • The water in the area ________ disappeared . (might / disappear)
    might have
  • We know water _________ easy to find. (can’t / be)
    can't have been
  • The animal drawings _______ roads. (couldn’t / be)
    couldn't have been
  • The animals _________ in the region. (must / live)
    must have lived
  • The lines ________ something very special to the Nasca people. (must / mean)
    must have meant
  • People _______ the drawings for fun. (might / make)
    might have made