My uncle wants to travel around the world because he enjoys ______ new places. [ ]

A. see

B. sees

C. saw

D. seeing

以下程序运行时,输出到屏幕的结果是___(7)___。

#include

void main()

{int a=0,b=1,d=10;

if(a)

if(b)

d=20;

else

d=30;

printf("%d\n",d);

}