When and where to build the new factory yet.
A. is not decided
B. are not decided
C. has not decided
D. have not decided
网友回答
(答案→)A. is not decided
B. are not decided
C. has not decided
D. have not decided
解析：句意：何时何地建新工厂还没有决定呢？何时何地为一个概念，所以谓语动词用单数，工厂是被建造，所以选A。