---What did you look for me for, Mary?

--- The boss wondered where you ___________ and how long you __________ there.

A．had been, had been

B．had gone, had gone

C．had been, had gone

D．had gone, had been

以下程序的输出结果是
#include＜iostream.h＞
void reverse(int a[ ] ，int n)
int i,t;
for(i＝0;i＜n/2;i＋＋)
t＝a[i] ;a[i] ＝a[n－1－i] ;a[n－1－i] ＝t;

void main( )
int b[10] ＝1,2,3,4,5,6,7,8,9,10;int i,s＝0;
reverse(b,8) ;
for(i＝6;i＜10;i＋＋) s＋＝b[i] ;
cout ＜ ＜ S;

Ａ) 22 Ｂ) 10 Ｃ) 34 Ｄ) 30