Had it been possible I would have gone to attend Monica in the hospital but I fully occu

问题补充：

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

答案：

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。