2. 外语
  3. According to the regulation, inspections ______to ensure that the systems are in good condition.

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

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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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