—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