The manager demanded that the workers extra hours to complete the task ahead of time.A. w

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(答案→)A. work
B. were working
C. worked
D. would work
解析：考查虚拟语气：句意：经理要求工人工作额外的时间来提前完成任务。主语的谓语是demand +从句，demand后接宾语从句时，从句谓语一般要用虚拟语气，即＂should + 动词原形＂；should可以省略。选A。