has been proposed that we —— our decision until the next morning.

问题描述:

has been proposed that we —— our decision until the next morning.
A.delay Bcan delay C.are to delay D.delayed
该选哪一个?可以说明理由吗?

A
虚拟语气.
虚拟10动词之一.三个建议之一的propose,其宾语从句用 should +V
should 省略的结果.
这里是变成了被动语态,则成为主语从句了.