求英语高手,关于虚拟语气的问题,说的详细点.As Commander-in-Chief of the armed force,I have directed that all measures________ for our defence.这个空填的是be taken.

问题描述:

求英语高手,关于虚拟语气的问题,说的详细点.
As Commander-in-Chief of the armed force,I have directed that all measures________ for our defence.
这个空填的是be taken.

就是说应该利用所有的手段来防御外敌
因为是说应该怎么样,说明其实没有这样,所以是虚拟语气