Mr. Bush is on time for everything. How it be that he was late for the important meeting?
A. can
B. should
C. may
D. must
网友回答
(答案→)A. can
B. should
C. may
D. must
解析：句意：布什先生做什么事情都是准时的，这么重要的会议他怎么会迟到呢？A. can表示推测，用于疑问和否定句中，B. should 应该，C. may 可以，D. must必须，选A。