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The scientist has failed in the test many times,______he never gives up. r

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he has failed;live up to    he failed not;come up with   has he failed;live up to   did he failed; come up with  
has failed  fails  failed  failing  
has been died    has dead    has died    has been dead  
have  has  have been  has been  
a; the   the; \   the; a   \; the  
respected   honoured   cared for   admired  
Having failed    Having been failed    Failed    To fail  
have failed    had been failed    has failed    will be failed  
where lives an old scientist    where does an old scientist live    lives an old scientist    does an old scientist live  
respected   honoured   cared for   admired  
he has failed; live up to   he failed not; come up with   has he failed; live up to   did he failed; come up with  
was    has been    have been    has  
failed; got down to  have failed ;set about   have failed ;should set out  has failed; set off  
he has failed; live up to    he failed; come up with    has he failed; live up to    did he fail; come up with  
have  has  have been  has been  
failed    had failed    have failed    has failed  
had he failed         he failed not    has he failed    did he fail  
has gone to/comes    has been to/will come    has gone to/will come    has been to/comes  

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