试题详情

I would have gone to visit him in the hospital had it been at all possible,but（ ）fully occupied the whole of last week.

该题考查句子结构。根据题意，but前是一与过去相反假设的虚拟语气，而其后从句意看是一真实条件句并且出现过去的时间状语，故答案为D。