we have received an order that we ___ the lab for a couple of days
问题描述:
we have received an order that we ___ the lab for a couple of days
A .mustn't use B .not use 为什么选B 不选A .
答
答案:B.解释:此题考查虚拟语气.1. 如果是order/command/advice/suggestion等表示“命令/建议/要求”等名词的同位语从句,则从句必须使用虚拟语气,即从句的谓语动词由“should + 动词原形”构成,且should经常被省略....