In recent times, however, the careful genetic study of hidden variation has (confirm/ been confirm) that "pure" races do not exist. 괄호 안 중에 뭐가 맞는지랑 이유좀 알려줄래??
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In recent times, however, the careful genetic study of hidden variation has (confirm/ been confirm) that "pure" races do not exist. 괄호 안 중에 뭐가 맞는지랑 이유좀 알려줄래??
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