题目内容
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 |
A
解析试题分析：考查情态动词。A可能；B一定；C也许；D需要。句意：史密斯先生任何事都很准时，怎么可能他会延误航班呢？ 故A正确。
考点：考查情态动词
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