Many young people in the west are expected to leave        could be life's most important decision

-marriage- almost entirely to luck.    [ ]

A. as          

B. that          

C. which            

D. what

如果算符函数调用格式的表达式：x.operator-(operator++(y，0)中的“-”是作为成员函数重载的，“++”是作为友元函数重载的，那么该表达式还可以表示为：()

A．x-y++

B．x-(++

C．(x++)-y

D．++x-y