—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


解析:

由could have been avoided（本來可以避免）可知雙方在談?wù)撨^去的事。故選A

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