“Aron Ralston is an man who is interested in mountain climbing. As a mountain climber,Aron used to taking risks.This is one of the exciting things about doing in dangerous sports”
最后一句中的this指代mountain climbing还是taking risks？为何？谢谢！
Aron used to taking risks. 应改为 Aron is used to taking risks.
This为近指代词。假如前句有二个名词，this 指代近期的那个名词。所以，this 指代的是taking risks. 语法上不允许其跳过taking 而指代更远的 mountain climbing.