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 It is necessary for us    (practice) spoken English every day.

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by that  at that  on that  in that  
are  was  is  will have been  
this, for    it, of    this, of    it, for  
It, of, to    This, of, of    It, for, to    This, for, to  
by that  at that  on that  in that  
vital, happy    important, healthy    necessary, health    vital, healthy  
to us to return   for us to return    to us returning   that we had returned  
interesting, to become    important, to      good, to    necessary, to be  
this    that    them    it  
is, in that    are, in that    is, in which    are, at that  
keep    keeping    to keep    kept  
this   that   it   them  
by that    at that    on that    in that  
this    that    it   what  
for     to     of     with
  

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