Hard work__success.Success___hard work.A.results from result in B.results in results fromC.leads to is according to D.is led to comes from需解析

Hard work__success.Success___hard work.A.results from result in B.results in results fromC.leads to is according to D.is led to comes from需解析 it's hard to A Hard Day's Night A Hard Day's Night it's hard to tell~ Hard work leads to s ---- “It's hard to die. let's play hard to It's So Hard 歌词 oh,it's too hard oh,it's too hard pull one's hard strings It's too hard for it's hard for me think(s) hard 有s吗 it's (),so we must().A a hard work,work hard B work hard,hard work C hard work,work hard Look.It's raining ____（hard） it's hard to make living It's hard to die怎么解释?