问题
选择题
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
答案
答案：A
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。
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