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:如果没有提前计划好整个手术,就会浪费大量的时间和金钱。由后半句可知是对过去的虚拟,结构为“从句:if+过去完成时;主句:情态动词的过去分词+完成时”。故选C。
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