—Such a mistake could have been avoided.
—Unfortunately, he the mistake again and again.
A. repeated
B. would repeat
C. had repeated
D. would have repeated
网友回答
(答案→)A. repeated
B. would repeat
C. had repeated
D. would have repeated
解析:由could have been avoided(本来可以避免)可知双方在谈论过去的事。故选A