问题补充:
Even if you had not been able to see her, you us.
A. told
B. had told
C. should tell
D. should have told
答案:
A. told
B. had told
C. should tell
(答案→)D. should have told
解析:考查虚拟语气的用法。由had not been able 可以看出条件状语从句是对过去的虚拟,主句没有自己的时间状语从语义上看也是对过去的虚拟,所以谓语动词应该是should have done句意:即使你见不着她,你也应该告诉我们一声。故选D; should也可用ought to,“should have done”表示本应该做某事却没做。