It's easy to said than done中间的to到底要不要?

It's easy to said than done中间的to到底要不要? It's not so easy to loving It's not easy to be everybody! it's not easy to do It's Easy To Remember 歌词 It's easy to say汉语翻译 .it's easy to understand 还是.it's easy to understand it It's easy to get thirsty_____ it's too hot. It's easy to talk in English is'n it. ：It's an easy question.Why can't you answer it correctly?The teacher said a__ It's not easy to be an astronaut’s son .. It's easy to understand the question为什么用TO? R :It's easy to say,but hard to do. It's _(easy) to say than to do. Well,it's comfortable,easy to keep clean,easy to keep warm,no need to paint it’s easy to say ,but it’s------- to do it It's never easy to admit you are wrong. They think it's easy to ride a