【正确答案】:
OLD PEOPLE HAVE STRENGTHS BUT ALSO GREAT WEAKNESSES—THEY TREND TO BE STUBBORN, FOR EXAMPLE—AND THEY SHOULD BE AWARE OF THAT. 
【题目解析】:容易指的是一种性格的趋向,而be easy to do指的是容易简单的程度。所以这里应该把趋向翻译出来。trend to倾向于,be apt to/inclined这几种表达均可。
OLD PEOPLE HAVE STRENGTHS BUT ALSO GREAT WEAKNESSES—THEY TREND TO BE STUBBORN, FOR EXAMPLE—AND THEY SHOULD BE AWARE OF THAT.