28. What was unexpected was that the disrespectable fellow ______ the old man.

A．could have robbed

B．should have helped

C．should rob

D．might have helped

软件设计包括软件的结构、数据接口和过程设计，其中软件的过程设计是指

A．模块间的关系

B．系统结构部件转换成软件的过程描述

C．软件层次结构

D．软件开发过程