填空题 The goal at which he had fought all his life no longer seemed important to him.
【正确答案】
【答案解析】at which应改为for which[解析] 分析句子结构可知，the goal后面应为修饰它的定语从句。再由fight for(为……而奋斗，斗争)可知，此处应用介词for+关系代词 which来引导定语从句。