--- What’s wrong with your mobile phone? Every time I call, the only response is “Sorry, the number you dialed is out of service…”!

--- Really? Maybe it’s because my mobile isn’t______the signal well.

A．picking out

B．picking up

C．giving out

D．giving away

下列程序的运行结果是( )

#include＜stdio.h＞

main()

int x=5,a=1,b=2,c=5,d=0；

if(a＜b)

if(b!=3)

if(!c)

x=1;

else

if(d) x=l;

else x=-1;

printf("%d",x);

A．-1

B．0

C．1

D．不确定的值