All the preparations for the task ，and we're ready to start.
A. pleted
B. plete
C. had been pleted
D. have been pleted
网友回答
A. pleted
B. plete
C. had been pleted
(答案→)D. have been pleted
解析：
现在完成时表示过去做的事对现在的影响。从and we're ready to start句意可知，一切准备工作已经就续，可以开始工作了。plete是及物动词，与句子的主语是被动关系，所以需要用被动语态表达。