According to the regulations of the company，you mustn’t ask for leave       you have a   doctor’s diagnosed note．

A．unless                B．now that      

C．even though       D．on condition that

（2010·湖南株洲二中高三上第三次月考）    31.According to the regulations of the company，you mustn’t ask for leave       you have a   doctor’s diagnosed note．

A．unless                B．now that      

C．even though       D．on condition that