Banking staff __(be) to be given more training to help them deal with armed robbers.

问题描述:

Banking staff __(be) to be given more training to help them deal with armed robbers.
which and why thanks you~
动作的执行者没有指出来,怎么判断单复数呢?
...

被动语态的邻近原则?
记得高中是这么讲过的~
LZ不要死抠语法 you are welcome,你说这句话的动作执行者出来了吗?