语法与词汇
If the whole operation _____ beforehand, a great deal of time and money would have been lost.
A、
was not planned
B、
has not been planned
C、
had not been planned
D、
were not planned
【正确答案】
C
【答案解析】
句意：如果我们没有提前计划整个手术，我们早就损失大量时间和金钱了。根据主句，我们可以肯定这里考查的是虚拟条件句的时态问题，这是一个对过去的虚拟，从句要用过去完成时，
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