参考答案：2005年7月我国允许人民币元对美元的汇率每天在0.3%的幅度内浮动。自那时以来，中国货币已升值8%以上。

解析：[听力原文]
The Chinese currency has appreciated by more than 8 percent since July 2005 when the country allowed the yuan to float against the U. S. dollar within a daily band of 0.3 percent.