As long as you stick to it,you’ll make progress ________.

A．in time

B．at a time

C．at one time

D．on time

有以下程序
#include＜stdio.h＞
main()

int sum,pad,pad;
sum=pad=5;
pAd=++sum,pAd++,++pad;
printf("%d\n",pad);

程序的输出结果是______。

A．6
B．5
C．7
D．8