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?

问题描述:

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.

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?