问题详情：
用括号内所给单词的适当形式填空。
1．Excuse ________ (I)．Is this your ruler?
2．—Is that your cup?
—No.________ (my)is white.
3．—Are those his English books?
—No，they are ________ (her)．
4．That is not ________ (Jane)eraser.
5．My parents are ________ (teacher)in a middle school.
【回答】
's hers
知识点：构词法
题型：完成句子
