本题程序首先给一个数组赋值，然后计算该数组中下标为奇数的元素的和。请将下述程序补充完整(注意：不得改动程序的结构，不得增行或删行)。
public class basic

public static void main (String args[])

int sum;
______;
int arrayList[] = new int[20];
for(int i = 0; i ＜= 19; i ++)
arrayList[i] = i + i;
int pos = 0;
while(pos ＜ 20)

if(______)
sum = sum + arrayList[pos];
______;

System.out.println("sum ="+ sum);

There ____________ some bread and some apples on the tables.[ ]

A. is

B. are

C. be