—Miss Gao has ____________ free time than Mr Green.—I think so. She is busy every day.
A:much
B:less
C:more
D:fewer
在一个不透明的袋子中装有若干个除颜色外形状大小完全相同的球,如果其中有20个红球,且摸出白球的概率是15,则估计袋子中大概有球的个数 ____