She's back from Australia,____ she ? A wasn't B doesn't C isn't D hasn't为什么不能选A,句中没有体现时态的词啊?求详细点的解释.

lucy’s mother -----（刚回来）back from work.she is tired She S Coming Back 歌词 She's Back (Again) 歌词 She 's from She s from She's back from Australia,_C__ she A wasn't B doesn't C isn't D hasn't She's been quite different since coming back from America.句中的she's 中的's是is ,还是has 的缩写 She's just back from school ,____she 选项 A.isn't B.doesn't C.hasn't D.wasn't He's come back from Canada.是什么意思 翻译That's different from back home She's Never Coming Back 歌词 she’s back on her feet She's from Australia.She'______Australian girl She is from ankrica she s--- English She's back from USA,___ she?A.wasn't B isn't我知道选B可为什么不是A Mary s( )English.She's from England 英语back和be back有什么区别?She will back from school.She will be back from school.有区别么? back from