Mum ______ my suggestion while Dad spoke ______ my idea．

A．turned off, in favour of

B．turned down, in favour of

C．turned down, in need of

D．turned on, in hope of

下列程序的输出结果是( )。 #include ＜stdio.h＞ main() { int a=O，i；for (i=1；i＜5；i++){ swich(i) { case 0： case 3：a+=1； case 1： case 2：a+=2； default:a+=3； }}printf ("%d", a); }

A．19

B．18

C．6

D．8