英语题目AB有何区别The work()ahead of the schedule,they went to the s
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The work()ahead of the schedule,they went to the seaside to have some fun.

A.had been finishedB.having been finished

选 择A,被动语态的过去完成时态,工作已提前完成了,他们去海边玩.

B仅仅是个分词结构,不能做谓语

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