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4 Written questions

3 Multiple choice questions

  1. Otis's invention could be used to ________ people safely to the upper floors of very tall buildings.
  2. These fitted into slots running the length of the elevator ______, keeping the cage from falling any further.
  3. If a cable broke and the cage began to fall, a spring caused two steel ________ to shoot out of the side of the cage.

3 True/False questions

  1. methodIf a cable broke and the cage began to fall, a spring caused two steel ________ to shoot out of the side of the cage.

          

  2. structureA set of steel girders fastened together and supported the _________ of the tall buildings.

          

  3. cathedralsThis is the way the great __________ of Europe were built hundreds of years ago.

          

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