Helen couldn’t go to France after all. That’s too bad. I’m sure she would have enjoyed it

问题补充：

Helen couldn’t go to France after all. That’s too bad. I’m sure she would have enjoyed it if .

A. she’s gone

B. she’ll go

C. she’d gone

D. she’d go

答案：

A. she’s gone

B. she’ll go

(答案→)C. she’d gone

D. she’d go

解析：表示与过去事实相反，从句用过去完成时。