It ___ 6 years since we left middle school.A.was B.had been C.has been D.were

Kitty came here three years ago=It ___ ___ ___ ___ since Kitty __ ___ It ___ 6 years since we left middle school.A.was B.had been C.has been D.were It ___ six years since I left school.空格填什么?It ___ six years since I left school.能填is,那has been 能不能填啊? it's years since i It's five years since he ___ (come) here说明原因 It has been ten years since I ___(be) a teacher. It ___(be)one and a half years since I __(begin) to study English. her grandmather has been dead for two years同义句it ___ two years since her grandmather __ It is said that it ___ here since hundreds of years ago Ahas been existed Bhas existed it is ten years since he became a doctor同义句He became a doctor ___ ___ ___ ___.(4条线) It three years since I smoked.翻译 It is five years since he smoked 1.it is about 600 years ago __ the frist clock was made.(that until when since)2.it was eight'clock ___ he came to school.it was at eight ___ he came to school.(that before since when ) She has been a nurse for five years(改为同义句) It ___ ____ five years since she became a nurse.只有两个空格,该怎么填 it is over ten years since my aunt left American同义句要写成My aunt ___ ____ ____from America for over years Three years ___(pass)since I left school.急! They got married for many years .= Many years ___ ___ since they got married. it's seems like years since it's been