问题
选择题
All the task ____ ahead of time, they decided to go on holiday for a week.
A．had been finished
B．were finished
C．having been finished
D．been finished
答案
答案：C
本题主要考查对句子结构的辨析。根据句子中的逗号可知，逗号前面部分不能是单独的句子，从而排除选项A、B；再根据动词的过去分词没有被动语态这一知识可知，选项D错误。