When and where to build the new factory _____ yet.A.is not decided B.are not decided请回答者给出较细致的解释.

问题描述:

When and where to build the new factory _____ yet.A.is not decided B.are not decided
请回答者给出较细致的解释.

用and,both...and连接并列主语,位于用复数形式.
但是,当and连接的并列主语指的是同一概念,谓语就用单数形式.
本题中,when and where to build the new factory 是一个概念,所以用单数,又因为这里用的是被动语态,所以选A
(转贴别人的回答供您参考) ...个人也认为是A