If the whole operation ______ beforehand, a great deal of time and money would h

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问题 If the whole operation ______ beforehand, a great deal of time and money would have been lost.

选项 A、was not planned
B、has not been planned
C、had not been planned
D、were not planned

答案 C

解析句意：如果不是所有的操作都提前计划好了，我们会遭受巨大损失。这里，条件状语从句所要求的是过去完成时态，同时应采用被动语态，故C项正确。

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