How time flies!Several years ____since we started our middle school life.We will keep the pleasantexperiences in our minds.A.have pass B.has passed C.will pass选哪个?为什么?

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Howtimeflies!Severalyears____sincewestartedourmiddleschoollife.Wewillkeepthepleasantexperiencesinour

How time flies!Several years ____since we started our middle school life.We will keep the pleasantexperiences in our minds.A.have pass B.has passed C.will pass选哪个?为什么?
How time flies!Several years ____since we started our middle school life.We will keep the pleasant
experiences in our minds.
A.have pass B.has passed C.will pass
选哪个?为什么?

How time flies!Several years ____since we started our middle school life.We will keep the pleasantexperiences in our minds.A.have pass B.has passed C.will pass选哪个?为什么?
B since 引导的从句,主句常和现在完成时连用

B 因为后面是since 所以这里必须用完成时