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The man stopped from time to time ______ whether he was being followed.

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at that time    for a time    at a time    from time to time  
at the right time    for the first time    from time to time    all the time  
do    doing    does    will do  
as if    like    what    as  
stopped; from  prevented; from  A.,Band  D.kept; from  
as if found    as to find    as if to find    when found  
for fear of   for fear that   to fear for   in fear of  
advised    talked    stopped    prevent  

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