—The war is very likely to break out in the near future.

—I __________, if the situation goes as it is.

A．hope so

B．hope not

C．am afraid not

D．am afraid so

软件危机出现于20时纪60年代末，为了解决软件危机，人们提出了______的原理来设计软件，这就是软件工程诞生的基础。