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As is known to us. the year 2016 has one extra day in it- February 29th. This is because it's...

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Had we known   We had known it    If we were known   If we know  
so well­known a       a so well­known    such well­known a    a such well­known  
so a well known    such a well known    a so well known    such well known a  
so a well-known  a so well-known   such well-known a  such a well-known  
for; as    to; for    as; for    to; as  
so well-known a    a so well-known    such well-known a    a such well-known  
that    what    which    when  
so well-known a    a so well-known    such well-known a    a such well-known  
As, what    As, as    what ,as    What ,what  
Great excitement will spread across the US.  Many Americans will be sent to madhouses.  About 20 million Americans will be put in prison.  A deadly epidemic will break out in the US.  
It is well known to us that    As is known to us that    As we know that    That is well known to us  
so a well-known    a so well-known    such well-known    such a well-known  
to have known    to be known    knowing    known  
is to hold; are    is to be held; was    are to hold; is    are to be held; is  
have ; known; have known    did; know; knew   did; know; have known    have; known; knew  
is to hold; is    is to be held; was    are to hold; is    are to be held; is  
so a well-known    a such well-known    so well-known a    such well-known a  
that   what   which   when  
so a well-known    a so well-known    such well-known a    such a well-known  
so a well-known    a so well-known    such well-known a    such a well-known  

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