All the preparations for the task , and we're ready to start.
A. pleted
B. plete
C. hadbeenpleted
D. havebeenpleted
网友回答
A. pleted
B. plete
C. hadbeenpleted
(答案→)D. havebeenpleted
解析：现在完成时表示过去的动作对现在造成的影响。从and we're ready to start 可知，一切准备工作已经就绪，可以开始工作了。