You can never be ________ when crossing the street．

     A．very careful               B．too careful     

              C．carefully enough           D．enough careful

 You can never be ________ when crossing the street．

     A．very careful                                     B．too careful         

       C．carefully enough                                D．enough careful

 You can never be ________ when crossing the street．

     A．very careful                                     B．too careful     

       C．carefully enough                                D．enough careful

You can never be ________ when crossing the street.