原文：在过去20年改革开放的过程中，中田已经成为世界上经济增长最快的国家之一。译文：China is one of the fastest growing economies in the world over the past two decades since its reform and opening-up.
【正确答案】：改译：China has been one of the fastest growing economics in the world over the past two decades since its reform and opening-up.
【题目解析】：翻译时要注意since引导的是现在完成时。
