It's______ a long time since I started to teach at this school

问题描述:

It's______ a long time since I started to teach at this school
为什么

It's been a long time since I started to teach at this school.
我在这所学校任教已有很长时间了.
【说明】It's = It has + been 因为后面的时间状语从句since引导,主句用完成时态.填quite 为什么quite adv.相当, 颇, 有点儿的意思这里用quite a long time也可以,是固定搭配,用于强调时间很长。eg: I had waited for quite a long time before he turned up.我等了他半天,他才来。