Long before they graduate from high school

Long before they graduate from high school It was not _____ they came back.A.long before B.before long C.long time before D.long after They had bought a house there_______ they moved there.A.before long B.long before C.long ago D.after long before和before long before 和before long before和before 翻译下面的句子：They had not known each other long before they got married. It is not long before they are so accustomed to swimming that they can pick up weights from the floor of the pool.It is not long before long before,before long,soon before,before soon的区别 before long 和 long before 怎么分辨? before long 和long before的区别 before long和long before区别 long before ,before long的区别 before long 与 long before的区别 before long和 long before的意思. long before和before long解释 举例 before long 和long before怎么区别? they worked three days_____before ago long for哪一个?before和ago有什么区别,简洁些,