问题描述：
[单选]
All the tasks（）ahead of time， they decided to go on holiday for a week．
A．had been fulfilled
B．having been fulfilled
C．were fulfilled
D．been fulfilled
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答案解析：无
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上一篇：All flights（）because of the snowstorm， many passengers could do nothing but take the train．
下一篇：As for the winter， it is inconvenient to be cold， with most of（）furnace fuel is allowed savedfor the dawn．
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