It---------- (be) four years since I moved here.

问题描述:

It---------- (be) four years since I moved here.

填写is或者has been,最好填has been,比较正规,意思是自从我搬到这儿已经四年了.
您的支持就是我继续前行,帮助别人的动力 愿您与我共同携手传播『 爱心 』之种
望采纳↖(^ω^)↗