Thanks to their hard work the new bridge has been finished.A. behind scheduleB. ahead of

问题补充：

Thanks to their hard work, the new bridge has been finished.

A. behind schedule

B. ahead of schedule

C. in front of schedule

D. beside schedule

答案：

A. behind schedule

(答案→)B. ahead of schedule

C. in front of schedule

D. beside schedule

解析：ahead of schedule；in advance；ahead of time这三个短语都是“提前”。

句意：多亏了他们的艰苦劳动，新桥才能提前完成。