单选题
______ I"d have told you.
A、
If I would have known it
B、
If I had have known it
C、
Had I known it
D、
Should I known it
【正确答案】
C
【答案解析】
[解析] 本题考查虚拟语气用法。从主句推出此句是表达与过去事实相反的情况，从句中应用had done形式。如果if去掉，句子需用倒装。句意为：如果我知道的话，我就告诉你了。
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