—How do you get to the city?—I _____ a plane to get there.[ ]

A. take    

B. by    

C. have

下列程序的执行结果是______。 #include＜lostream.h＞ int a; int sum_a(void) { a=a+5; return a; } void main(void) { a=a+sum_a( ); cout＜＜a＜＜endl; }