Mr. Bush is on time for everything. How it be that he was late for the important meeting?

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。