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It’s a good habit to wash your hands ________ you have meals.

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unless  while  when  before  
wash     washed    washing     to wash  
if  when  as soon as   the same as  
put away    put up    put out    put off  
in the way    in place    in hand    in case  
may    can    have to    must  
to check   checked   checking   Check  
Excuse me  All right   No  Good idea  
unless  while  when  before  
may    can    have to    must  
Use warm water.  Keep it clean.  Wash it twice a day.  Use soap.  

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