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

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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：如果事先没有计划好整个运作，大量的时间和金钱将会流失。由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”。

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