It ___ 6 years since we left middle school. A．was B．had been

It ___ 6 years since we left middle school. It ___ five years since he left for Beijing.A.was B.had been It___ten years since he left Shanghai.A.was B.is C.had been It --- five years since he left for Beijing. A.was B.had bee 1.it ____ 5 years since we knew each other.A is B had been C since 急it was ten years since i had left my hometown.leave是终 It ____ five years since he has left for Beijing.A.was B.has dong英语的进来1\It ___ten years since he ____here.A.is;left B.was it has been three years since i left school（be away for）用括号内 It __ years since we had the last holiday.A.looks like B.sou It ___ six years since I left school.空格填什么? Several years has passed since we started our middle school