问题
选择题
He commanded that all the gates _____when it was getting dark in case thieves came in .
A．were shut
B．must be shut
C．could be shut
D．be shut
答案
答案：D
题目分析：考查虚拟语气：句意：他命令所有的门天黑的时候要关闭，以防小偷进来。主句的谓语是command，宾语从句的谓语是虚拟语气，谓语是should do，should可以省略，因为the gates和shut是被动关系，用be shut，选D。