we have received an order that we ___ the lab for a couple o

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/13 23:49:36

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.
2. B not use = should not use,should被省略了.
所以正确答案是B.

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