He manded 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
网友回答
A. were shut
B. must be shut
C. could be shut
(答案→)D. be shut
解析：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mand，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。