According to the regulation, inspections ______to ensure that the systems are in

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问题 According to the regulation, inspections ______to ensure that the systems are in good condition.

选项 A、demanded
B、have demanded
C、be demanded
D、are demanded

答案 D

解析空格处为主句的谓语部分，主语为：inspections(检查)，谓语部分应使用被动语态；并且，根据从句时态可以判断，主句时态为一般现在时。故选D。

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