Mr. Smith is always on time for everything. How ________ it be that he was late for the flight?
A．canB．mustC．mayD．need
A

試題分析：考查情態(tài)動詞辨析。本題是強調(diào)句型的一個變式：It 情態(tài)動詞 be…that/who…其它成分；本句是其特殊疑問句的形式。是對具體的發(fā)生進行的強調(diào)。句意：斯密斯先生總是很準(zhǔn)時，怎么可能會乘坐飛機遲到呢？can可能；must一定，必須；may也許；need需要；根據(jù)句意說明A正確。
點評：情態(tài)動詞就是表示說話者對事情的一種看法，也就是一種語氣。情態(tài)動詞的用法一直是命題者常設(shè)置的考點和重點，平時要加強記憶。值的注意的是，中學(xué)階段的情態(tài)動詞�？碱~有13個，can-could may-might should-ought to had better will-would   need  have to .考生應(yīng)注意對這13個情態(tài)動詞的用法多總結(jié)，多運用。
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