They are working ______ time to fulfill the task according to the schedule.

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问题 They are working ______ time to fulfill the task according to the schedule.

选项 A、against
B、over
C、ahead of
D、before

答案A

解析 A．against time争分夺秒地；B．over time随着时间的推移；C．ahead of time提早；D．before在……以前。

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