The city government is planning to build a factory to deal with the industry waste but whe

问题补充：

The city government is planning to build a factory to deal with the industry waste，but when and where to build it.

A. haven’t been decided

B. aren’t decided

C. hadn’t been decided

D. hasn’t been decided

答案：

A. haven’t been decided

B. aren’t decided

C. hadn’t been decided

(答案→)D. hasn’t been decided

解析：考察主谓一致和被动语态。本题句子的主语是when and where to build it这是一个不定式结构在句中作主语，表示的是一件事情，故使用单数形式。句意：市政府计划建一个工厂来处理工业污水，但是何时何地来建设这个工厂还没有被确定。根据句意说明使用被动语态。故D正确。