The prime advantage of getting old is put an end to the thin
3个回答

The prime advantage of getting old is putting an end to the things which seem never satisfying.

变老的主要好处在于结束那些似乎从来都不令人满意的事情.

seem用单数,定语从句的先行词是things复数.修饰things,形容词应该用-ing形式.

be put表示被动了.这里是主动含义.