The ________ cost of making a movie has risen by 20%.

The ________ cost of making a movie has risen by 20%.
A、regular
B、average
C、seldom
D、balance
【正确答案】：B
【题目解析】：regular 常规的；average 平均的；seldom 很少；balance 平衡；句意：制作一部电影的平均成本上升了20%。因此B 符合题意。