Mr. Smith is always on time for everything. How it be that he was late for the flight?
A. can
B. must
C. may
D. need
网友回答
(答案→)A. can
B. must
C. may
D. need
解析：考查情态动词辨析。本题是强调句型的一个变式：It 情态动词 be…that/who…其它成分；本句是其特殊疑问句的形式。是对具体的发生进行的强调。句意：斯密斯先生总是很准时，怎么可能会乘坐飞机迟到呢？can可能；must一定，必须；may也许；need需要；根据句意说明A正确。