Order came that all the army supply to the front before daybreak.A. be sentB. should send

问题补充：

Order came that all the army supply to the front before daybreak.

A. be sent

B. should send

C. were sent

D. should have sent

答案：

(答案→)A. be sent

B. should send

C. were sent

D. should have sent

解析：考查同位语从句和虚拟语气。名词order后面的同位语从句要使用“should+动词原形：构成的虚拟语气，should可以省略。句意：命令传来，所有的供应物资都要在天亮之前被送到前线。故A正确。