单选题
I would have come to see you______, but I was so busy then.
A、
had it been possible
B、
were it possible
C、
if it were to be possible
D、
if it should have been possible
【正确答案】
A
【答案解析】
解析：句意：如果可能我当时就来看你了，但是我当时太忙了。本题考查的是虚拟语气，对过去的虚拟，主句用的是一般过去时，从句用过去完成时。
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