题干
35. –Michael was late for Mr. Smith’s oral class this morning.
--_____? As far as I know, he never came late to class.
A：How come
B：So what
C：Why not
D：What for
答案(点此获取答案解析）
A
个白球，从中任意取一个球，恰为白球的机会为 
，则