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As a middle school teacher, you have to be     with your students all the time.

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a;an  an;a   a;a  an;an  
has taught    has been teaching    taught    had taught  
after that    from then on    from then    since then  
thousand    thousand of    thousands of    two thousand of  
teaches; working    teaches; work    teach; to work    teach; working  
a    the    an    /  
worked  has worked  works  had worked  
teaches; working    teaches; work     teach; to work    teach; working  
would teach    has taught    is teaching    taught  
who    that    whom    whose  
teach; to work    teaches; working    teaches; to work    teach; working  
a;an    an;an    an;a    a;a  
teaches; working    teaches; work      teach; to work    teach; working  

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