解题思路： 根据句意和语法进行，注意大小写和词的变化形式。
解题过程：
1 Is this your pencil? No, it isn’t. It is hers
2 Is that his eraser? Yes. They are his
3 These dictionaries are not Bobs. They are mine
4 Are these books my parents?
5 Is that yours? No, it isn’t. It is hers.
最终答案： 1 Is this your pencil? No, it isn’t. It is hers 2 Is that his eraser? Yes. They are his 3 These dictionaries are not Bobs. They are mine 4 Are these books my parents? 5 Is that yours? No, it isn’t. It is hers.
