以下选项中循环结构合法的是( )。

A．while (int i＜7) (i++; systeouprintln("i is "+; }

B．int j=3; while( {systeouprintln("j is "+; }

C．int j=0; for(int k=0;j+k!=10;j++,k++) { systeouprintln("j is "+j+"k is "+;}

D．int j=0; do{ systeouprintln("j is "+j++); if(j==3) {continue loop;} }while(j<10);