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

来源：百度知道编辑：UC知道时间：2024/05/17 06:50:27

A had been filled B having been filled

C were filled D been filled
why

B having been filled
逗号后面是一个完整的句子，又没有and连接，所以，前面的句子，不应该是一个完整的句子，其他选项放进去，都是一个完整的句子，也就是说，had，were都可以做谓语动词。
D的话，没有have提示，怎么能用been呢，been是过去分词，和have一起，才能表示完成时的，不能单独用

B独立主格的结构

all of the students i like Tom _ Ms Jones is trying to offer all the details _ to the matter under discussion.. the following tasks can be performed with admintool. The children were given tasks appropriate to their ablilties. steve likes to do all the a _ like running,playing chess and so on all the sports The GreatestLove Of All all the ...的用法 all the thing 是什么意思 all over the place