-----His letter arrived a month ago. ______ to Peter?  

----- Yes. You know, I have been busy in preparing for the final exam all the time.   [ ]

A. Didn’t you write              

B. Don’t you write  

C. Hadn’t you written            

D. Haven’t you written

下列关于i的输出值，正确的是( )。

A．#include＜iostream＞using namespace std;void main(){ for(int i=0;i＜=3;i++) i++; cout＜＜i;{ 则输出值为5。

B．A程序的输出值为6

C．#include＜iostream＞using namespace std;void main(){ for(int i=0;i＜=3;i++) { i++; cout＜＜i; }} 则输出值为13。

D．C程序的输出值为5