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Practice Listening: Fill in the Blanks (Type In) ID: #36776 July Prediction Short Life on Mars
Instructions
* Fill in the missing words into the blank fields
The  thing  that  makes  it  difficult  is  because  even  if  life  had  evolved  on  Mars,  the  chances  of  being  preserved  are  very  small.  If  we  use  Earth  as  a    and  our  planet  is  teeming  with  life,  yet  it  rarely  preserves  evidence  of  life  of  the  fossil  record.  And  the  focus  now  is  on  exploring  for    environments.  If  you're  looking  for  water,  a    of  energy,  either  solar  energy  or  thermal  energy  or  chemical  energy,  and  then    carbon,  assuming  life  as  we  know  it  on  Earth  based  on  carbon.  So  those  are  sort  of  the  three  things  that  we're  looking  for  in  the  course  of  our  mission.

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