单选题
______ for your help, we'd never have been able to get over the difficulties.
A、
Had it not
B、
If it were not
C、
Had it not been
D、
If we had not been
【正确答案】
C
【答案解析】
虚拟语气。在if引导的虚拟条件从句中，如果if省略则条件从句倒装，从句中的助动词或系动词调到句首。本句大意为：要不是你的帮助，我们不可能克服这么多困难。
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