It's surprising that your brother ________ Russian so quickly-he hasn't lived there very long.[ ]

A. picked up  

B. looked up

C. put up  

D. made up

有如下程序
main()
int y=3,x=3,z=1；
printf("%d%d\n",(++x,y++),z+2)；

运行该程序的输出结果是______。

A) 3 4
B) 4 2
C) 4 3
D) 3 3