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Practice Listening: Fill in the Blanks (Type In) ID: #34309 Short Iron and Steel
Instructions
* Fill in the missing words into the blank fields
The  advancement  in  the  art  of    iron  and  steel  is  considered  by  many  as  one  of  the  most  significant  happenings  in  the  history  of  civilization.  However,  iron  was  not  as    used  as  steel  until  the  creation  of  the  blast  furnace,  which  made    quantities  of  the  metal  accessible.  Afterward,  the  development  of  methods  for  refining  steel  on  a  larger  scale  was  created,    the  Bessemer  method  and  open-hearth  processes.  At  present,  the  yielding  of  iron  and  steel  is  roughly  15  times  that  of  all  other  metals  combined.  In  addition,  steel  can  be  produced  in    amounts  at  a  small  expense.

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