—Such a mistake could have been avoided.
—Unfortunately, he ________ the mistake again and again.
A．repeatedB．would repeatC．had repeatedD．would have repeated
A
因為could have done是對過去發(fā)生的事表示遺憾，所以答語也應(yīng)該是指他在過去一再犯這樣的錯誤。
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