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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