问题补充:
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
答案:
(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。