前面两位的回答中,都有语法错误.
need表示被动的时候的用法是
need to bedone或need doing
而值得做某事是worth doing
所以应该是
Cherish what worths cherishing,
Give up what needs to be given up.
cherish what worths to be cherished,
give up what needs to be gave up
cherish what worths to be cherished,
give up what needs to be gave up