The manager demanded that the task within a week.A. must completeB. would be completedC.

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A. must plete
B. would be pleted
(答案→)C. be pleted
D. must be pleted
解析：考查虚拟语气。Demand(要求)后面接宾语从句，从句中使用虚拟语气（should）+动词原形。句意：经理要求这个任务要在一个星期内完成。本句的任务与finish构成被动关系，故C正确。