Many an airplane and many a big gun( )in the exhibition.

Many an airplane and many a big gun( )in the exhibition.
A.are shown B.has been shiwn C,have been D.show them
【选 B】has been shown 展出了许多飞机和大炮.
【解析】many a +单数可数名词,谓语动词用单数
当 and 连接的并列名词词组带有 each,every,many a 或 more than one 等限定词 时,随后的动词通常用单数.
例如：
Every boy and every girl in this room is entitled to a copy.
Many a man and (many a )woman in this community finds himself or herself in need.
More than one college student wishes to return to the easy days of high school.