All the tasks ______ ahead of time, they decided to go on holiday for a week.A、b

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问题 All the tasks ______ ahead of time, they decided to go on holiday for a week.

选项 A、been fulfilled
B、having been fulfilled
C、were fulfilled
D、had been fulfilled

答案 B

解析独立主格结构题。分析句子结构发现，此空部分为整个句子的状语，“分词逻辑主语+分词”为独立主格结构，可在句中作状语。因为分词逻辑主语和分词之间是被动关系，同时又发生在谓语动词decide之前，故用现在分词的完成被动式having been fulfilled。

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Inthesentence"Allthetaskshavingbeenfulfilledaheadoftime,theydecided