excuse me,do you know miss black's telephone number?sorry,i don't know.
问题描述:
excuse me,do you know miss black's telephone number?sorry,i don't know.
she ( )it since yesterday.
a.has changed
b.have changed
为什么?she 不是应该选a的吗
答
B 无论如何是不对的,请放心.
she 后面只能接 has 或 had (过去式)