How time flies!Several years ____since we started our middle school life.We will keep the pleasant
问题描述：
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?
答
B since 引导的从句,主句常和现在完成时连用