【正确答案】 A

【答案解析】[解析] 本句意思是“他们拒不承认失败。”句中acknowledge“承认，认可”，例如：He is unwilling to acknowledge defeat．他不愿认输。admit“承认”，例如：I must admit，it's more deficit than I thought it would he．我必须承认，这比我想象的要困难得多。declare“宣布”，例如：He declared that he was innocent．他声称自己是无罪的。agree“同意”，commit“许诺”，例如：He would not commit himself in any way．他不愿做出任何承诺。只有admit意思上和acknowledge最接近。