is this your sister?的答语为什么是Yes,it/she is.,两种人称,it,she都可以呢?

is this your sister?的答语为什么是Yes,it/she is.,两种人称,it,she都可以呢? 请问Is this your sister?的答语是 Yes,it is还是Yes,she is. Is this your sister?的答语是Yes,it/she is. Is this your sister?的回答是yes,it is还是yes she is Is this/that your sister 的答语是Yes,it is./ No,it isn’t 为什么要用it Is this your mother?的答语是Yes,it is 还是Yes,she is 请说明原因 Is this your mother 的答语是yes ,it is 还是yes,she is 请说明原因 Is this girl your sister?肯定回答是Yes,it is.还是Yes,she is. Is this your sister?的答句是“Yes,it is.”还是“Yes,she's.” Is this your sister 答语为什么要用it is. Is this your sister?Yes ,----填it is还是she is that girl your sister?,回答是：yes it is.还是：yes she is.