i would have gone to visit him had it been at all possible,but i __ fully occupied last week.

问题描述:

i would have gone to visit him had it been at all possible,but i __ fully occupied last week.
A.was B.had been
had it been是虚拟if 省略的倒装吗?

你说的对,had it been是虚拟if 省略的倒装,but后面陈述的是 last week的一个状态,所以选A