Is that your sister?怎么回答

Is that your sister?怎么回答 is that your sister?应该怎样回答? Is that ( ) your sister Is that your sister?的肯定回答是什么 Is that girl your sister?做否定回答 How is your sister 应该怎么回答?(英语口试) is that your sister改为复数形式,怎么改? Is this/that your uncle?怎么回答? is this your father?否定回答 that is his sister?复数句 that girl your sister?,回答是：yes it is.还是：yes she is. This is your sister That is my Is this your sister?否定回答