一道高中水平左右的英语题.

题目

一道高中水平左右的英语题.
I have got the order from the boss that the work( )finished before 5pm today.
A ,would be
B,be
C,will have been
D,could be
选什么,给点充分的理由?

答案

B 本来是should be的,但是should 可以省略.
一些表示建议、命令、要求、想法等的名词,如 agreement,decision,determination,suggestion,proposal,idea,plan,order,等后的表语从句、同位语从句的谓语要用虚拟语气,即should+动词原形或 只用动词原形 .常用的这类名词有：advice (建议),command (命令),demand (要求),desire (要求),idea (意见),motion (提议),order (命令),plan (计划),proposal (提议),preference (偏爱),insistence (主张),suggestion (建议),recommendation (劝告)等.这里should可以省略.