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 (against以……为竞争对手)。句意为:为了按时完成任务,他们只争朝夕地工作。B.over同work连用,意为“检查”;C.ahead of后跟time,意为“提前”;D. before在……之前。
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