susan arrived here a week 空格,and has been here ever 空格.

问题描述:

susan arrived here a week 空格,and has been here ever 空格.
a.befor;ago b.befor;since c.ago;befor d.ago;since 选一个

D
苏珊一周前来的这里,从那之后就一直待在这里了.