now judy is using the same mobile phone __was used by Alice two days ago.为什么用as

now judy is using the same mobile phone __was used by Alice two days ago.为什么用as
now judy is using the same mobile phone __was used by Alice two days ago.
为什么用as

now judy is using the same mobile phone __was used by Alice two days ago.为什么用as
as which
前面有the same,后面要用as.注意：前后所说的手机并不是同一台,仅是同一型号.因此不能用which/that.
希望能提供帮助.

考查定语从句，如定语从句的先行词前有the same/ as/ such/ so 修饰，引导词用as.(词义相当于that/ which/who/whom)