单选题 The problem ______ success is that by the time you are rich enough to sleep late, you are so old that you always wake up early.

【正确答案】 C

【答案解析】这里是介词的用法问题。不用of因为这里problem与Success没有修饰关系、同位关系、偏正关系、主谓关系、动宾关系等。而with是指成功后问题来了的意思，就像前面第77题一样be happy with。