the life we were used to __ greatly since 1992

问题描述:

the life we were used to __ greatly since 1992
A.change B.has changed C.changing D.have changed
请各位说一哈为什么,

因为since 所以是完成时
主语是life 第三人称单数
综上 选b
the life(we were used to )has changed greatly since 1992
注意:括号里是定语 只起修饰作用哦