loudspeakers were fixed in the hall so that everyone an opportunity to hear

问题描述:

loudspeakers were fixed in the hall so that everyone an opportunity to hear
loudspeakers were fixed in the hall so that everyone an opportunity to hear
the speach.
A ought to B must have
C may have D should have
为什么选D不选A?
这是虚拟语气吗?我怎么觉得不是?

虚拟语气不仅用于条件从句,下面的从句也需要用虚拟语气:1.表示个人意愿(如建议、命令、要求、主张等)的名词从句——动词要用 should do 或者省略 should 直接用动词原形 do,如:1)宾语从句:I suggested that he...