Not until he left home ＿＿to know how important the family wa

Not until he left home ＿＿to know how important the family wa Not until he left his home _ how important the family was fo he did not know how to work out the probblems When he was a child,he left home.Until it became the home of It is important for the host family to know We do not know how important something is until we lose it 什 he did not go home until he finished the work.为什么这里要用until?不 He did not know how to fight ,but he knocked the boxer 【 】填介 He dod not know how to filght ,but he knocked the boxer（ ） 后 填副词或介词He did not know how to fight,but he knocked the boxer he does not know how he can get to the train station个 He did not know how to fight,but he knocked the boxer______.