He gave up the way of life he had got accustomed to ________ to be independent. [    ]

A. learning  

B. learn

C. to learn  

D. to learning

下列程序的输出结果是______。
#include ＜stdio.h＞
main()
int x=10,y=10,i；
for(i=0；x＞8；y=++i
printf("%d %d"，x--,y)；