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
网友回答
A. had been
(答案→)B. was
C. am
D. have been
解析：句意：假如说可能的话，我就会去医院照顾Monica，但是上个月我一直很忙。这里有时间状语last month，句子要用一般过去时。故选B。