你能改变句中划线单词的一个字母或加上一个字母构成新词，填入空白处，使句意通畅吗？

题目

你能改变句中划线单词的一个字母或加上一个字母构成新词，填入空白处，使句意通畅吗？
This is our classroom ._____ is on the right ours（ours画线）
The boy throws the _____ to his sister,but she doesn't catch（catch画线） it.
The twin like（like画线）to_____ in the countryside with their grandparents together.

答案

This is our classroom.Yours is on the right.
The boy throws the match to his sister,but she doesn;t catch it.
The twin like to live in the countryside with their grandparents together.
请问第一题的right ours 之间是不是少个of?