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？

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.