询问并回答 Who's this/that? — 英语选择题
题目
放学后，Lingling 带同学 Mingming 回家。Mingming 看见一位老奶奶，问："Who's this?" Lingling 回答："This is my grandma." 接着，Lingling 指着院子里较远处的一位老爷爷问 Mingming："And who's that?" 如果按本单元句型正确回答，Lingling 应该说：A. This is my grandpa. B. That is my grandpa. C. That is my grandma. D. This is my grandma.