问题描述: my sister is 12.[对画线部分提问 1个回答 分类:英语 2014-09-28 问题解答: 我来补答 1.如果对my sister划线提问,则为:Who is 12?2.如果是对my划线提问,则为:Whose sister is 12?3.如果是对12划线提问,则为:How old is your sister?我觉得应该是第三种, 展开全文阅读