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  • crane
    A large machine used to lift heavy objects
  • boulder
    A large rock
  • ache
    A continuous pain
  • have to
    Must do something
  • concrete
    A hard, strong building material made from cement, sand, and water
  • steeply
    At a sharp angle
  • lower
    To move something down
  • incredible
    something is so amazing or surprising that it's hard to believe
  • exhausted
    Very tired
  • exam
    A test to measure knowledge or ability.
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