may can表猜测

Mr. Bush is on time for everything. How ___ it be that he was late for the opening ceremony?

A.can B.should C.may D.must

不能用may?

can能力,may请求,must命令,should建议,can't猜测,mustn't禁止.对吗？请各造一个句子 must may can 区别 can和may的区别 Can/May I 用法 can&may的区别(越详越好) Can与May的区别 must ,may,can 的用法 can与 may的不同之处 CAN BE可用于肯定猜测吗? 请问may与can的异同