某事业单位2013年末结账前，"经营收入"科目贷方余额为432万元，"经营支出"科目借方余额为360万元，"销售税金"科目借方余额为63万元；当年"销售税金"科目的余额中为经营活动所发生的金额为52万元。则该单位2013年的经营结余为（）万元。

A.360

B.432

C.72

D.20

—Has Ham started out? He said he would join in the party.

—He ____. He is a man who always keeps his word.

A．must have left

B．need have left

C．should have left

D．could have left