He commanded that all the gates .A. should shutB. would be shutC. shutD. be shut

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A. should shut
B. would be shut
C. shut
(答案→)D. be shut
解析：mand后跟宾语从句时，从句中用should＋动词原形，should可以省略。gates与谓语动词shut之间有被动关系，因而用被动语态。故选D。