If law and order______not maintained, neither the citizens nor their properties are safe.

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问题 If law and order______not maintained, neither the citizens nor their properties are safe.

选项 A、were
B、are
C、is
D、was

答案D

解析 主谓一致和虚拟语气。law and order意为“法制”。根据主谓一致,排除A和B项;又因为此句应用虚拟语气。故答案为D。
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