[单选题]If the whole operation （） beforehand, a great deal of time and money would have been lost.

was not planned

has not been planned

had not been planned

were not planned

正确答案：C

题目解析

结合句意及后面的“would have been lost”可知，此处表示与过去事实相反的虚拟语气，从句中应使用“had +过去分词”的形式。结合句意可以确定此处应为had not been planned，故选C。

句意：如果不是事先计划好整个行动，将会损失大量的时间和金钱。

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[单选题]If the whole operation （ ） beforehand, a great deal of time and money would have been lost.