—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
—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
.A
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