It'sbeen three years since Isaw you last.什么意思?

It'sbeen three years since Isaw you last.什么意思? It three years since I smoked.翻译 It was three years before he came it was i met miss white in hangzhou A:three years before B:three years ago that C:three years whenD:three years ago since three years I have been here for three years.=It is three years ______I____here It take me three years to write the book 对three years 提问 It takes me three years to write the book.就three years 提问?怎么提问? It's three years since he was married .的翻译 It is three years since she was in the My uncle 什么 it from my gandfather three years ago. It will be three years before we meet again. 英语翻译还有It will be three years before he graduated. it well be three years before we can meet again It was three years ago ( ) he left 为什么是that? 翻译three years had pasted before I knew it Three years went by before I knew it. it was three years i met miss white in hangzhou A:three years before B:three years ago thatC:three years when D:three years ago sinceit was i met miss white in hangzhou