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We all do more speaking _____, even when we have a break after class .          

   A. now and then        B．by and by C. step by step        D．more or less

We all do more speaking          , even when we have a break after class .          

   A. now and then         B．by and by           C. step by step          D．more or less

We all do more speaking ___________, even when we have a break after class .

         A．now and then   B．by and by C．step by step      D．more or less

We all do more speaking          , even when we have a break after class .

       A．now and then B．by and by        C．step by step     D．more or less

We all do more speaking ___________, even when we have a break after class .

       A．now and then B．by and by        C．step by step     D．more or less