【题目】Had it been possible, I would have gone to attend Monica in the hospital, but I _______ fully occupied last month.
A. had been B. was C. am D. have been
在线课程【答案】B
【解析】
试题分析：句意：如果可能会到医院照顾Monica，但是上个月我很忙。本题but前面一句是虚拟语气，表示与过去事实相反。But的后面使用陈述语气，前面是与过去事实相反，说明后面使用一般过去时。故B正确。