We’d better _________ when he is thinking, as he prefers to solve problems on his own.

A．wake him up

B．set him aside

C．leave him alone

D．ring him up

对于下述说明，不能使变量p-＞b的值增1的表达式是______。 struct exm { int a； int b； float c }*p；

A．++p-＞b

B．++(p++)-＞b

C．p-＞b++

D．(++-＞b++