lily__ a student ,and__ mother is a teacher A is | she B is\her 选什么 解析下

lily__ a student ,and__ mother is a teacher A is | she B is\her 选什么 解析下
lily__ a student ,and__ mother is a teacher A is | she B is\her 选什么 解析下

lily__ a student ,and__ mother is a teacher A is | she B is\her 选什么 解析下
lily 第三人称单数,用is,her 形容词物主代词,她的

B
前一个空为单数形式的第三人称助动词is，后一个空应为第三人称所有格(阴性)。