— What did he _______ when he went out?

— An umbrella.

A．take along

B．take down

C．take on

D．take out

下列程序的输出结果是 ______。
main()
int i=3;
switch(i)
case 1:
casc 2: printf(("%d",i);
case 3:
case 4: break;
defanlt:printf("OK");

A) 0
B) 3
C) OK
D) 没有任何输出